From 7f2803866d8a52f130de58e2e845eb0ea37d744d Mon Sep 17 00:00:00 2001
From: Javinator9889 <javialonso007@hotmail.es>
Date: Mon, 18 Jun 2018 17:02:26 +0200
Subject: [PATCH] Finished SQL modeling

---
 Design/DB_STRUCTURE/Logical.svg               | 221 +++++++++
 Design/DB_STRUCTURE/Relational.svg            | 453 ++++++++++++++++++
 Design/DB_STRUCTURE/database_design.dmd       |   8 +
 .../database_design/ChangeRequests.local      |   2 +
 .../businessinfo/Business Information.xml     |   7 +
 .../businessinfo/Objects.local                |   2 +
 .../datatypes/DDLSelection.local              |   2 +
 .../database_design/datatypes/DataTypes.xml   |  15 +
 .../database_design/datatypes/Diagrams.local  |   4 +
 .../database_design/datatypes/Objects.local   |   5 +
 .../47E390DE-0671-C4B1-8428-0F45CBEE18F8.xml  |  10 +
 .../F72C39E0-D1CA-8821-2AD7-A1E95A37D3D1.xml  |  10 +
 .../CFDE5FC8-D6A4-DF2D-FAA9-F1FC327377FA.xml  |  26 +
 .../database_design/dl_settings.xml           | 434 +++++++++++++++++
 .../database_design/dmd_open.local            |   6 +
 .../database_design/logical/Diagrams.local    |   4 +
 .../database_design/logical/Logical.xml       |   7 +
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 ...RM351C3A3B-985F-1B54-60FE-A46161E8F350.xml |   3 +
 ...RMC5DFC5DD-35E9-B422-B2BF-B7648E7DE99B.xml |   7 +
 .../database_design/mapping/ExtendedMap.xml   |   3 +
 ...RM351C3A3B-985F-1B54-60FE-A46161E8F350.xml |   3 +
 ...RMC5DFC5DD-35E9-B422-B2BF-B7648E7DE99B.xml |  86 ++++
 .../database_design/pm/Objects.local          |   2 +
 .../database_design/pm/Process Model.xml      |   7 +
 .../rdbms/database_design_RDBMSSites.xml      |   2 +
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 .../C5DFC5DD-B7648E7DE99B/DDLSelection.local  |   2 +
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 .../F0AD5A40-5659-C806-BEA1-595FD0DB5F39.xml  |  76 +++
 Design/DB_STRUCTURE/db_script.ddl             | 147 ++++++
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+<use xlink:href="#fk_sym" x="4" y="101" width="8" height="8" fill-opacity="1.0"/><a xlink:href="#Music" >
+<text x="16" y="108" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+Metadata_Music_FK (Music_file_id)
+</text></a>
+<line x1="0" y1="114" x2="225" y2="114" fill="none" stroke="rgb(0,0,255)"/>
+<text x="2" y="128" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+U
+</text>
+<text x="16" y="128" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+Metadata__IDX (Music_file_id)
+</text>
+</g>
+<g  fill="rgb(255,255,180)" stroke="rgb(0,0,255)" fill-opacity="1.0" stroke-opacity="1.0" clip-path="url(#clipPath3_0_)" transform="translate(382,38)" >
+<rect x="0" y="0" width="264" height="131" />
+<text id="Music" x="117" y="14" fill="rgb(0,0,255)" font-weight="bold"  fill-opacity="1.0" font-size="10" stroke="none">
+Music
+</text>
+<line x1="0" y1="18" x2="263" y2="18" fill="none" stroke="rgb(0,0,255)"/>
+<text x="16" y="32" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+*
+</text>
+<text x="2" y="32" fill="rgb(0,0,255)" fill-opacity="1.0" font-size="10" stroke="none">
+P
+</text>
+<text x="26" y="32" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+file_id
+</text>
+<text x="146" y="32" fill="rgb(0,128,0)" fill-opacity="1.0" font-size="10" stroke="none">
+VARCHAR2 (256 CHAR)
+</text>
+<text x="16" y="46" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+
+</text>
+<text x="26" y="46" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+video_id
+</text>
+<text x="146" y="46" fill="rgb(0,128,0)" fill-opacity="1.0" font-size="10" stroke="none">
+VARCHAR2 (20 CHAR)
+</text>
+<text x="16" y="60" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+
+</text>
+<text x="26" y="60" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+audio_quality
+</text>
+<text x="146" y="60" fill="rgb(0,128,0)" fill-opacity="1.0" font-size="10" stroke="none">
+INTEGER
+</text>
+<text x="16" y="74" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+
+</text>
+<text x="26" y="74" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+audio_format
+</text>
+<text x="146" y="74" fill="rgb(0,128,0)" fill-opacity="1.0" font-size="10" stroke="none">
+INTEGER
+</text>
+<text x="16" y="88" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+
+</text>
+<text x="26" y="88" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+times_requested
+</text>
+<text x="146" y="88" fill="rgb(0,128,0)" fill-opacity="1.0" font-size="10" stroke="none">
+INTEGER
+</text>
+<text x="16" y="102" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+
+</text>
+<text x="26" y="102" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+is_metadata_by_user
+</text>
+<text x="146" y="102" fill="rgb(0,128,0)" fill-opacity="1.0" font-size="10" stroke="none">
+CHAR (1)
+</text>
+<line x1="0" y1="108" x2="263" y2="108" fill="none" stroke="rgb(0,0,255)"/>
+<use xlink:href="#pk_sym" x="4" y="115" width="8" height="8" fill-opacity="1.0"/>
+<text x="16" y="122" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+Music_PK (file_id)
+</text>
+</g>
+<g  fill="rgb(255,255,180)" stroke="rgb(0,0,255)" fill-opacity="1.0" stroke-opacity="1.0" clip-path="url(#clipPath4_0_)" transform="translate(42,289)" >
+<rect x="0" y="0" width="250" height="109" />
+<text id="Playlist" x="107" y="14" fill="rgb(0,0,255)" font-weight="bold"  fill-opacity="1.0" font-size="10" stroke="none">
+Playlist
+</text>
+<line x1="0" y1="18" x2="249" y2="18" fill="none" stroke="rgb(0,0,255)"/>
+<text x="16" y="32" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+*
+</text>
+<text x="2" y="32" fill="rgb(0,0,255)" fill-opacity="1.0" font-size="10" stroke="none">
+P
+</text>
+<text x="26" y="32" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+playlist_id
+</text>
+<text x="131" y="32" fill="rgb(0,128,0)" fill-opacity="1.0" font-size="10" stroke="none">
+VARCHAR2 (256 CHAR)
+</text>
+<text x="16" y="46" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+
+</text>
+<text x="26" y="46" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+number_elements
+</text>
+<text x="131" y="46" fill="rgb(0,128,0)" fill-opacity="1.0" font-size="10" stroke="none">
+INTEGER
+</text>
+<text x="16" y="60" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+
+</text>
+<text x="26" y="60" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+times_requested
+</text>
+<text x="131" y="60" fill="rgb(0,128,0)" fill-opacity="1.0" font-size="10" stroke="none">
+INTEGER
+</text>
+<line x1="0" y1="66" x2="249" y2="66" fill="none" stroke="rgb(0,0,255)"/>
+<use xlink:href="#pk_sym" x="4" y="73" width="8" height="8" fill-opacity="1.0"/>
+<text x="16" y="80" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+Playlist_PK (playlist_id)
+</text>
+</g>
+<g  fill="rgb(255,255,180)" stroke="rgb(0,0,255)" fill-opacity="1.0" stroke-opacity="1.0" clip-path="url(#clipPath6_0_)" transform="translate(677,415)" >
+<rect x="0" y="0" width="256" height="137" />
+<text id="Preferences" x="98" y="14" fill="rgb(0,0,255)" font-weight="bold"  fill-opacity="1.0" font-size="10" stroke="none">
+Preferences
+</text>
+<line x1="0" y1="18" x2="255" y2="18" fill="none" stroke="rgb(0,0,255)"/>
+<text x="16" y="32" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+
+</text>
+<text x="26" y="32" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+audio_quality
+</text>
+<text x="148" y="32" fill="rgb(0,128,0)" fill-opacity="1.0" font-size="10" stroke="none">
+VARCHAR2 (5 CHAR)
+</text>
+<text x="16" y="46" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+
+</text>
+<text x="26" y="46" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+audio_format
+</text>
+<text x="148" y="46" fill="rgb(0,128,0)" fill-opacity="1.0" font-size="10" stroke="none">
+VARCHAR2 (5 CHAR)
+</text>
+<text x="16" y="60" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+
+</text>
+<text x="26" y="60" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+os
+</text>
+<text x="148" y="60" fill="rgb(0,128,0)" fill-opacity="1.0" font-size="10" stroke="none">
+VARCHAR2 (10 CHAR)
+</text>
+<text x="16" y="74" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+
+</text>
+<text x="26" y="74" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+should_ask_metadata
+</text>
+<text x="148" y="74" fill="rgb(0,128,0)" fill-opacity="1.0" font-size="10" stroke="none">
+CHAR (1)
+</text>
+<text x="16" y="88" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+*
+</text>
+<text x="2" y="88" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+F
+</text>
+<text x="26" y="88" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+User_user_id
+</text>
+<text x="148" y="88" fill="rgb(0,128,0)" fill-opacity="1.0" font-size="10" stroke="none">
+INTEGER
+</text>
+<line x1="0" y1="94" x2="255" y2="94" fill="none" stroke="rgb(0,0,255)"/>
+<use xlink:href="#fk_sym" x="4" y="101" width="8" height="8" fill-opacity="1.0"/><a xlink:href="#User" >
+<text x="16" y="108" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+Preferences_User_FK (User_user_id)
+</text></a>
+<line x1="0" y1="114" x2="255" y2="114" fill="none" stroke="rgb(0,0,255)"/>
+<text x="2" y="128" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+U
+</text>
+<text x="16" y="128" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+Preferences__IDX (User_user_id)
+</text>
+</g>
+<g  fill="rgb(255,255,180)" stroke="rgb(0,0,255)" fill-opacity="1.0" stroke-opacity="1.0" clip-path="url(#clipPath7_0_)" transform="translate(402,426)" >
+<rect x="0" y="0" width="204" height="109" />
+<text id="User" x="91" y="14" fill="rgb(0,0,255)" font-weight="bold"  fill-opacity="1.0" font-size="10" stroke="none">
+User
+</text>
+<line x1="0" y1="18" x2="203" y2="18" fill="none" stroke="rgb(0,0,255)"/>
+<text x="16" y="32" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+*
+</text>
+<text x="2" y="32" fill="rgb(0,0,255)" fill-opacity="1.0" font-size="10" stroke="none">
+P
+</text>
+<text x="26" y="32" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+user_id
+</text>
+<text x="92" y="32" fill="rgb(0,128,0)" fill-opacity="1.0" font-size="10" stroke="none">
+INTEGER
+</text>
+<text x="16" y="46" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+
+</text>
+<text x="26" y="46" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+username
+</text>
+<text x="92" y="46" fill="rgb(0,128,0)" fill-opacity="1.0" font-size="10" stroke="none">
+VARCHAR2 (45 CHAR)
+</text>
+<text x="16" y="60" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+
+</text>
+<text x="26" y="60" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+name
+</text>
+<text x="92" y="60" fill="rgb(0,128,0)" fill-opacity="1.0" font-size="10" stroke="none">
+CLOB
+</text>
+<line x1="0" y1="66" x2="203" y2="66" fill="none" stroke="rgb(0,0,255)"/>
+<use xlink:href="#pk_sym" x="4" y="73" width="8" height="8" fill-opacity="1.0"/>
+<text x="16" y="80" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+User_PK (user_id)
+</text>
+</g>
+<g  fill="rgb(255,255,180)" stroke="rgb(0,0,255)" fill-opacity="1.0" stroke-opacity="1.0" clip-path="url(#clipPath5_0_)" transform="translate(2,30)" >
+<rect x="0" y="0" width="305" height="111" />
+<text id="Playlist_has_Music" x="105" y="14" fill="rgb(0,0,255)" font-weight="bold"  fill-opacity="1.0" font-size="10" stroke="none">
+Playlist_has_Music
+</text>
+<line x1="0" y1="18" x2="304" y2="18" fill="none" stroke="rgb(0,0,255)"/>
+<text x="16" y="32" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+*
+</text>
+<text x="2" y="32" fill="rgb(0,0,255)" fill-opacity="1.0" font-size="10" stroke="none">
+PF
+</text>
+<text x="26" y="32" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+Playlist_playlist_id
+</text>
+<text x="134" y="32" fill="rgb(0,128,0)" fill-opacity="1.0" font-size="10" stroke="none">
+VARCHAR2 (256 CHAR)
+</text>
+<text x="16" y="46" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+*
+</text>
+<text x="2" y="46" fill="rgb(0,0,255)" fill-opacity="1.0" font-size="10" stroke="none">
+PF
+</text>
+<text x="26" y="46" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+Music_file_id
+</text>
+<text x="134" y="46" fill="rgb(0,128,0)" fill-opacity="1.0" font-size="10" stroke="none">
+VARCHAR2 (256 CHAR)
+</text>
+<line x1="0" y1="52" x2="304" y2="52" fill="none" stroke="rgb(0,0,255)"/>
+<use xlink:href="#pk_sym" x="4" y="59" width="8" height="8" fill-opacity="1.0"/>
+<text x="16" y="66" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+Playlist_has_Music_PK (Playlist_playlist_id, Music_file_id)
+</text>
+<line x1="0" y1="72" x2="304" y2="72" fill="none" stroke="rgb(0,0,255)"/>
+<use xlink:href="#fk_sym" x="4" y="79" width="8" height="8" fill-opacity="1.0"/><a xlink:href="#Playlist" >
+<text x="16" y="86" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+Playlist_has_Music_Playlist_FK (Playlist_playlist_id)
+</text></a>
+<use xlink:href="#fk_sym" x="4" y="93" width="8" height="8" fill-opacity="1.0"/><a xlink:href="#Music" >
+<text x="16" y="100" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+Playlist_has_Music_Music_FK (Music_file_id)
+</text></a>
+</g>
+<g  fill="rgb(255,255,180)" stroke="rgb(0,0,255)" fill-opacity="1.0" stroke-opacity="1.0" clip-path="url(#clipPath1_0_)" transform="translate(396,238)" >
+<rect x="0" y="0" width="234" height="117" />
+<text id="History" x="100" y="14" fill="rgb(0,0,255)" font-weight="bold"  fill-opacity="1.0" font-size="10" stroke="none">
+History
+</text>
+<line x1="0" y1="18" x2="233" y2="18" fill="none" stroke="rgb(0,0,255)"/>
+<text x="16" y="32" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+*
+</text>
+<text x="2" y="32" fill="rgb(0,0,255)" fill-opacity="1.0" font-size="10" stroke="none">
+PF
+</text>
+<text x="26" y="32" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+User_user_id
+</text>
+<text x="110" y="32" fill="rgb(0,128,0)" fill-opacity="1.0" font-size="10" stroke="none">
+INTEGER
+</text>
+<text x="16" y="46" fill="rgb(255,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+*
+</text>
+<text x="2" y="46" fill="rgb(0,0,255)" fill-opacity="1.0" font-size="10" stroke="none">
+PF
+</text>
+<text x="26" y="46" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+Music_file_id
+</text>
+<text x="110" y="46" fill="rgb(0,128,0)" fill-opacity="1.0" font-size="10" stroke="none">
+VARCHAR2 (256 CHAR)
+</text>
+<line x1="0" y1="52" x2="233" y2="52" fill="none" stroke="rgb(0,0,255)"/>
+<use xlink:href="#pk_sym" x="4" y="59" width="8" height="8" fill-opacity="1.0"/>
+<text x="16" y="66" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+History_PK (User_user_id, Music_file_id)
+</text>
+<line x1="0" y1="72" x2="233" y2="72" fill="none" stroke="rgb(0,0,255)"/>
+<use xlink:href="#fk_sym" x="4" y="79" width="8" height="8" fill-opacity="1.0"/><a xlink:href="#User" >
+<text x="16" y="86" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+History_User_FK (User_user_id)
+</text></a>
+<use xlink:href="#fk_sym" x="4" y="93" width="8" height="8" fill-opacity="1.0"/><a xlink:href="#Music" >
+<text x="16" y="100" fill="rgb(0,0,0)" fill-opacity="1.0" font-size="10" stroke="none">
+History_Music_FK (Music_file_id)
+</text></a>
+</g>
+
+</svg>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design.dmd b/Design/DB_STRUCTURE/database_design.dmd
new file mode 100644
index 0000000..56c7fe3
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design.dmd
@@ -0,0 +1,8 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<OSDM_Design class="oracle.dbtools.crest.model.design.Design" name="database_design" id="3C168D0F-3177-9281-C715-B5AB03BB32C4" version="3.5">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:24:29 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<capitalNames>false</capitalNames>
+<designId>3C168D0F-3177-9281-C715-B5AB03BB32C4</designId>
+</OSDM_Design>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/ChangeRequests.local b/Design/DB_STRUCTURE/database_design/ChangeRequests.local
new file mode 100644
index 0000000..647e766
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/ChangeRequests.local
@@ -0,0 +1,2 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<oracle.dbtools.crest.model.design.Design/>
diff --git a/Design/DB_STRUCTURE/database_design/businessinfo/Business Information.xml b/Design/DB_STRUCTURE/database_design/businessinfo/Business Information.xml
new file mode 100644
index 0000000..0efdef7
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/businessinfo/Business Information.xml	
@@ -0,0 +1,7 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<BusinessInfoDesign class="oracle.dbtools.crest.model.businessinfo.BusinessInfoDesign" name="Business Information" id="59BF102E-D6AA-D04B-9C26-BF948677664C">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:24:30 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<shouldBeOpen>false</shouldBeOpen>
+</BusinessInfoDesign>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/businessinfo/Objects.local b/Design/DB_STRUCTURE/database_design/businessinfo/Objects.local
new file mode 100644
index 0000000..d8a4386
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/businessinfo/Objects.local
@@ -0,0 +1,2 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<oracle.dbtools.crest.model.businessinfo.BusinessInfoDesign/>
diff --git a/Design/DB_STRUCTURE/database_design/datatypes/DDLSelection.local b/Design/DB_STRUCTURE/database_design/datatypes/DDLSelection.local
new file mode 100644
index 0000000..0030592
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/datatypes/DDLSelection.local
@@ -0,0 +1,2 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<oracle.dbtools.crest.model.design.datatypes.DataTypesDesign objectID="DE3FC7A8-6D17-E34E-603A-3A735F2357ED"/>
diff --git a/Design/DB_STRUCTURE/database_design/datatypes/DataTypes.xml b/Design/DB_STRUCTURE/database_design/datatypes/DataTypes.xml
new file mode 100644
index 0000000..542e77f
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/datatypes/DataTypes.xml
@@ -0,0 +1,15 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<DataTypesDesign class="oracle.dbtools.crest.model.design.datatypes.DataTypesDesign" name="DataTypes" id="DE3FC7A8-6D17-E34E-603A-3A735F2357ED" mainViewID="CFDE5FC8-D6A4-DF2D-FAA9-F1FC327377FA">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:24:30 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<shouldBeOpen>false</shouldBeOpen>
+<collectionOfRefsPrefix>array_ref_</collectionOfRefsPrefix>
+<collectionPrefix>array_</collectionPrefix>
+<defaultArrayLimit>10</defaultArrayLimit>
+<defaultCollectionType_Kind>ARRAY</defaultCollectionType_Kind>
+<defaultCollectionType_Suffix>_Array</defaultCollectionType_Suffix>
+<embeddedStructuredTypePrefix>inst_</embeddedStructuredTypePrefix>
+<referencePrefix>ref_</referencePrefix>
+<useRoleInAssociationEndAsName>true</useRoleInAssociationEndAsName>
+</DataTypesDesign>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/datatypes/Diagrams.local b/Design/DB_STRUCTURE/database_design/datatypes/Diagrams.local
new file mode 100644
index 0000000..c1f552c
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/datatypes/Diagrams.local
@@ -0,0 +1,4 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<oracle.dbtools.crest.model.design.datatypes.DataTypesDesign>
+   <object objectType="main_view" objectID="CFDE5FC8-D6A4-DF2D-FAA9-F1FC327377FA" name="DataTypes" visible="false"/>
+</oracle.dbtools.crest.model.design.datatypes.DataTypesDesign>
diff --git a/Design/DB_STRUCTURE/database_design/datatypes/Objects.local b/Design/DB_STRUCTURE/database_design/datatypes/Objects.local
new file mode 100644
index 0000000..aedbb26
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/datatypes/Objects.local
@@ -0,0 +1,5 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<oracle.dbtools.crest.model.design.datatypes.DataTypesDesign>
+   <object objectType="StructuredType" objectID="47E390DE-0671-C4B1-8428-0F45CBEE18F8" name="SDO_GEOMETRY" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.datatypes.StructuredType" propertyParentId="DE3FC7A8-6D17-E34E-603A-3A735F2357ED" propertySourceId="" propertyTargetId=""/>
+   <object objectType="StructuredType" objectID="F72C39E0-D1CA-8821-2AD7-A1E95A37D3D1" name="XMLTYPE" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.datatypes.StructuredType" propertyParentId="DE3FC7A8-6D17-E34E-603A-3A735F2357ED" propertySourceId="" propertyTargetId=""/>
+</oracle.dbtools.crest.model.design.datatypes.DataTypesDesign>
diff --git a/Design/DB_STRUCTURE/database_design/datatypes/structuredtype/seg_0/47E390DE-0671-C4B1-8428-0F45CBEE18F8.xml b/Design/DB_STRUCTURE/database_design/datatypes/structuredtype/seg_0/47E390DE-0671-C4B1-8428-0F45CBEE18F8.xml
new file mode 100644
index 0000000..3013800
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/datatypes/structuredtype/seg_0/47E390DE-0671-C4B1-8428-0F45CBEE18F8.xml
@@ -0,0 +1,10 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<StructuredType class="oracle.dbtools.crest.model.design.datatypes.StructuredType" name="SDO_GEOMETRY" directorySegmentName="seg_0" id="47E390DE-0671-C4B1-8428-0F45CBEE18F8">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:24:30 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<visible>false</visible>
+<predefined>true</predefined>
+<final>false</final>
+<instantiable>true</instantiable>
+</StructuredType>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/datatypes/structuredtype/seg_0/F72C39E0-D1CA-8821-2AD7-A1E95A37D3D1.xml b/Design/DB_STRUCTURE/database_design/datatypes/structuredtype/seg_0/F72C39E0-D1CA-8821-2AD7-A1E95A37D3D1.xml
new file mode 100644
index 0000000..a6fb615
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/datatypes/structuredtype/seg_0/F72C39E0-D1CA-8821-2AD7-A1E95A37D3D1.xml
@@ -0,0 +1,10 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<StructuredType class="oracle.dbtools.crest.model.design.datatypes.StructuredType" name="XMLTYPE" directorySegmentName="seg_0" id="F72C39E0-D1CA-8821-2AD7-A1E95A37D3D1">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:24:30 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<visible>false</visible>
+<predefined>true</predefined>
+<final>false</final>
+<instantiable>true</instantiable>
+</StructuredType>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/datatypes/subviews/CFDE5FC8-D6A4-DF2D-FAA9-F1FC327377FA.xml b/Design/DB_STRUCTURE/database_design/datatypes/subviews/CFDE5FC8-D6A4-DF2D-FAA9-F1FC327377FA.xml
new file mode 100644
index 0000000..ba94c3b
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/datatypes/subviews/CFDE5FC8-D6A4-DF2D-FAA9-F1FC327377FA.xml
@@ -0,0 +1,26 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<Diagram class="oracle.dbtools.crest.swingui.datatypes.DPVDataTypes" id="CFDE5FC8-D6A4-DF2D-FAA9-F1FC327377FA">
+<createdBy>Javier Alonso Silva</createdBy>
+<modifiedBy>Javier Alonso Silva</modifiedBy>
+<createdTime>2018-06-18 14:24:30 UTC</createdTime>
+<autoRoute>false</autoRoute>
+<boxInbox>true</boxInbox>
+<showLegend>false</showLegend>
+<showLabels>true</showLabels>
+<showRelAttributes>false</showRelAttributes>
+<gridEnabled>false</gridEnabled>
+<showGrid>false</showGrid>
+<diagramColor>-1</diagramColor>
+<display>false</display>
+<notation>1</notation>
+<objectViews>
+<OView class="oracle.dbtools.crest.swingui.datatypes.TVStructuredType" oid="47E390DE-0671-C4B1-8428-0F45CBEE18F8" otype="StructuredType" vid="08D9F187-2170-179A-8933-4118C225057C">
+<hideElementsInCurrentOnly>false</hideElementsInCurrentOnly>
+<bounds x="20" y="20" width="100" height="100"/>
+</OView>
+<OView class="oracle.dbtools.crest.swingui.datatypes.TVStructuredType" oid="F72C39E0-D1CA-8821-2AD7-A1E95A37D3D1" otype="StructuredType" vid="C35D1DCC-9595-9B5E-0910-9B2BFBA28B33">
+<hideElementsInCurrentOnly>false</hideElementsInCurrentOnly>
+<bounds x="20" y="20" width="100" height="100"/>
+</OView>
+</objectViews>
+</Diagram>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/dl_settings.xml b/Design/DB_STRUCTURE/database_design/dl_settings.xml
new file mode 100644
index 0000000..2bee852
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/dl_settings.xml
@@ -0,0 +1,434 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<settings>
+	<logical_type_for_domain_presentation value="false" />
+	<automatic_pk_generation value="false" />
+	<automatic_uk_generation value="false" />
+	<automatic_fk_generation value="false" />
+	<preserve_ddl_generation_options value="false" />
+	<use_global_design_level_settings value="false" />
+	<use_preferred_classification_types value="false" />
+	<substitution_patterns>
+	</substitution_patterns>
+	<classification_types>
+		<type name="Hecho" color="-7482" fgcolor="-16776961" prefix="" id="1" preferred="false" >
+		<fonts>
+			<font_object fo_type="Título" font_color="-16776961" font_name="Dialog" font_size="10" font_style="1"/>
+			<font_object fo_type="Elemento" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Tipo de Dato" font_color="-16744448" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Elemento de Clave Primaria" font_color="-16776961" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Elemento de Clave Ajena" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Elemento de Clave Única" font_color="-16776961" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="No Nulo" font_color="-65536" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Clave" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Comentarios" font_color="-12566464" font_name="Dialog" font_size="10" font_style="0"/>
+		</fonts>
+		</type>
+		<type name="Dimensión" color="-1781507" fgcolor="-16776961" prefix="" id="2" preferred="false" >
+		<fonts>
+			<font_object fo_type="Título" font_color="-16776961" font_name="Dialog" font_size="10" font_style="1"/>
+			<font_object fo_type="Elemento" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Tipo de Dato" font_color="-16744448" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Elemento de Clave Primaria" font_color="-16776961" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Elemento de Clave Ajena" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Elemento de Clave Única" font_color="-16776961" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="No Nulo" font_color="-65536" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Clave" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Comentarios" font_color="-12566464" font_name="Dialog" font_size="10" font_style="0"/>
+		</fonts>
+		</type>
+		<type name="Registro" color="-1776412" fgcolor="-16776961" prefix="" id="3" preferred="false" >
+		<fonts>
+			<font_object fo_type="Título" font_color="-16776961" font_name="Dialog" font_size="10" font_style="1"/>
+			<font_object fo_type="Elemento" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Tipo de Dato" font_color="-16744448" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Elemento de Clave Primaria" font_color="-16776961" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Elemento de Clave Ajena" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Elemento de Clave Única" font_color="-16776961" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="No Nulo" font_color="-65536" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Clave" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Comentarios" font_color="-12566464" font_name="Dialog" font_size="10" font_style="0"/>
+		</fonts>
+		</type>
+		<type name="Resumen" color="-3148598" fgcolor="-16776961" prefix="" id="4" preferred="false" >
+		<fonts>
+			<font_object fo_type="Título" font_color="-16776961" font_name="Dialog" font_size="10" font_style="1"/>
+			<font_object fo_type="Elemento" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Tipo de Dato" font_color="-16744448" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Elemento de Clave Primaria" font_color="-16776961" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Elemento de Clave Ajena" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Elemento de Clave Única" font_color="-16776961" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="No Nulo" font_color="-65536" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Clave" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Comentarios" font_color="-12566464" font_name="Dialog" font_size="10" font_style="0"/>
+		</fonts>
+		</type>
+		<type name="Temporal" color="-1" fgcolor="-16776961" prefix="" id="5" preferred="false" >
+		<fonts>
+			<font_object fo_type="Título" font_color="-16776961" font_name="Dialog" font_size="10" font_style="1"/>
+			<font_object fo_type="Elemento" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Tipo de Dato" font_color="-16744448" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Elemento de Clave Primaria" font_color="-16776961" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Elemento de Clave Ajena" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Elemento de Clave Única" font_color="-16776961" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="No Nulo" font_color="-65536" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Clave" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Comentarios" font_color="-12566464" font_name="Dialog" font_size="10" font_style="0"/>
+		</fonts>
+		</type>
+		<type name="Externo" color="-720908" fgcolor="-16776961" prefix="" id="6" preferred="false" >
+		<fonts>
+			<font_object fo_type="Título" font_color="-16776961" font_name="Dialog" font_size="10" font_style="1"/>
+			<font_object fo_type="Elemento" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Tipo de Dato" font_color="-16744448" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Elemento de Clave Primaria" font_color="-16776961" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Elemento de Clave Ajena" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Elemento de Clave Única" font_color="-16776961" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="No Nulo" font_color="-65536" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Clave" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Comentarios" font_color="-12566464" font_name="Dialog" font_size="10" font_style="0"/>
+		</fonts>
+		</type>
+		</classification_types>
+	<default_fonts_and_colors>
+		<fc_object classname="Entity" background="-5971457" foreground="-16776961" noBackgroundColor="false" noForegroundColor="false">
+		<fonts>
+			<font_object fo_type="Título" font_color="-16776961" font_name="Dialog" font_size="10" font_style="1"/>
+			<font_object fo_type="Atributo" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Tipo de Dato" font_color="-16744448" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Elemento de Clave Primaria" font_color="-16776961" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Elemento de Clave Ajena" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Elemento de Clave Única" font_color="-16776961" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="No Nulo" font_color="-65536" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Clave" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Comentarios" font_color="-12566464" font_name="Dialog" font_size="10" font_style="0"/>
+		</fonts>
+		</fc_object>
+		<fc_object classname="Logical View" background="-25750" foreground="-16776961" noBackgroundColor="false" noForegroundColor="false">
+		<fonts>
+			<font_object fo_type="Título" font_color="-16776961" font_name="Dialog" font_size="10" font_style="1"/>
+			<font_object fo_type="Atributo" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Tipo de Dato" font_color="-16744448" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Comentarios" font_color="-12566464" font_name="Dialog" font_size="10" font_style="0"/>
+		</fonts>
+		</fc_object>
+		<fc_object classname="Table" background="-76" foreground="-16776961" noBackgroundColor="false" noForegroundColor="false">
+		<fonts>
+			<font_object fo_type="Título" font_color="-16776961" font_name="Dialog" font_size="10" font_style="1"/>
+			<font_object fo_type="Columna" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Tipo de Dato" font_color="-16744448" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Elemento de Clave Primaria" font_color="-16776961" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Elemento de Clave Ajena" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Elemento de Clave Única" font_color="-16776961" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="No Nulo" font_color="-65536" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Clave" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Comentarios" font_color="-12566464" font_name="Dialog" font_size="10" font_style="0"/>
+		</fonts>
+		</fc_object>
+		<fc_object classname="Relational View" background="-6881386" foreground="-16776961" noBackgroundColor="false" noForegroundColor="false">
+		<fonts>
+			<font_object fo_type="Título" font_color="-16776961" font_name="Dialog" font_size="10" font_style="1"/>
+			<font_object fo_type="Columna" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Tipo de Dato" font_color="-16744448" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Elemento de Clave Primaria" font_color="-16776961" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Elemento de Clave Ajena" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Elemento de Clave Única" font_color="-16776961" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="No Nulo" font_color="-65536" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Clave" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Comentarios" font_color="-12566464" font_name="Dialog" font_size="10" font_style="0"/>
+		</fonts>
+		</fc_object>
+		<fc_object classname="Structured Type" background="-7537956" foreground="-16777216" noBackgroundColor="false" noForegroundColor="false">
+		<fonts>
+			<font_object fo_type="Título" font_color="-16776961" font_name="Dialog" font_size="10" font_style="1"/>
+			<font_object fo_type="Atributo" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Tipo de Dato" font_color="-16777056" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Método" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="No Instanciable" font_color="-65536" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Obligatorio" font_color="-65536" font_name="Dialog" font_size="10" font_style="0"/>
+		</fonts>
+		</fc_object>
+		<fc_object classname="Cube" background="-7482" foreground="-16777216" noBackgroundColor="false" noForegroundColor="false">
+		<fonts>
+			<font_object fo_type="Título" font_color="-16776961" font_name="Dialog" font_size="10" font_style="1"/>
+			<font_object fo_type="Entidades de Hechos" font_color="-16776961" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Tipo de Medida" font_color="-16776961" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Medida" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Función" font_color="-16777056" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Fórmula" font_color="-65536" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Atributos de Secundario a Principal" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+		</fonts>
+		</fc_object>
+		<fc_object classname="Dimension" background="-16713196" foreground="-16777216" noBackgroundColor="false" noForegroundColor="false">
+		<fonts>
+			<font_object fo_type="Título" font_color="-16776961" font_name="Dialog" font_size="10" font_style="1"/>
+		</fonts>
+		</fc_object>
+		<fc_object classname="Level" background="-1781507" foreground="-16777216" noBackgroundColor="false" noForegroundColor="false">
+		<fonts>
+			<font_object fo_type="Título" font_color="-16776961" font_name="Dialog" font_size="10" font_style="1"/>
+			<font_object fo_type="Entidad de Nivel" font_color="-16776961" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Tipo" font_color="-16776961" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Atributo" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Función" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+		</fonts>
+		</fc_object>
+		<fc_object classname="Process" background="-106" foreground="-16777216" noBackgroundColor="false" noForegroundColor="false">
+		<fonts>
+			<font_object fo_type="Título" font_color="-16776961" font_name="Dialog" font_size="10" font_style="1"/>
+			<font_object fo_type="Número de Proceso" font_color="-65536" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Tarea de Transformación" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+		</fonts>
+		</fc_object>
+		<fc_object classname="External Agent" background="-5570646" foreground="-16777216" noBackgroundColor="false" noForegroundColor="false">
+		<fonts>
+			<font_object fo_type="Título" font_color="-16776961" font_name="Dialog" font_size="10" font_style="1"/>
+		</fonts>
+		</fc_object>
+		<fc_object classname="Information Store" background="-10170881" foreground="-16777216" noBackgroundColor="false" noForegroundColor="false">
+		<fonts>
+			<font_object fo_type="Título" font_color="-16776961" font_name="Dialog" font_size="10" font_style="1"/>
+			<font_object fo_type="Número" font_color="-1" font_name="Dialog" font_size="10" font_style="1"/>
+		</fonts>
+		</fc_object>
+		<fc_object classname="In-Out Parameters" background="-328966" foreground="-16777216" noBackgroundColor="false" noForegroundColor="false">
+		<fonts>
+			<font_object fo_type="Título" font_color="-16777216" font_name="Dialog" font_size="10" font_style="1"/>
+			<font_object fo_type="Parámetros" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Tipo de Dato" font_color="-65536" font_name="Dialog" font_size="10" font_style="0"/>
+		</fonts>
+		</fc_object>
+		<fc_object classname="Transformation" background="-43" foreground="-16777216" noBackgroundColor="false" noForegroundColor="false">
+		<fonts>
+			<font_object fo_type="Título" font_color="-16777216" font_name="Dialog" font_size="10" font_style="1"/>
+			<font_object fo_type="Número de Proceso" font_color="-65536" font_name="Dialog" font_size="10" font_style="0"/>
+		</fonts>
+		</fc_object>
+		<fc_object classname="Note" background="-4144960" foreground="-16777216" noBackgroundColor="false" noForegroundColor="false">
+		<fonts>
+			<font_object fo_type="Título" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+		</fonts>
+		</fc_object>
+		<fc_object classname="Label" background="-1" foreground="-16777216" noBackgroundColor="true" noForegroundColor="true">
+		<fonts>
+			<font_object fo_type="Texto" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+		</fonts>
+		</fc_object>
+		<fc_object classname="Relationship Attributes" background="-26266" foreground="-16777216" noBackgroundColor="false" noForegroundColor="false">
+		<fonts>
+			<font_object fo_type="Atributo" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Tipo de Dato" font_color="-16744448" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="No Nulo" font_color="-65536" font_name="Dialog" font_size="10" font_style="0"/>
+		</fonts>
+		</fc_object>
+		<fc_object classname="Legend" background="-1" foreground="-16777216" noBackgroundColor="false" noForegroundColor="false">
+		<fonts>
+			<font_object fo_type="Diagrama" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Autor" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Creado el" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Modificado el" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Modificado por" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Diseño" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Modelo" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+			<font_object fo_type="Propiedades Definidas por el Usuario" font_color="-16777216" font_name="Dialog" font_size="10" font_style="0"/>
+		</fonts>
+		</fc_object>
+	</default_fonts_and_colors>
+	<default_line_widths_and_colors>
+		<lwc_object classname="Logical Relation" color="-16777216" width="1">
+		</lwc_object>
+		<lwc_object classname="Logical Inheritance" color="-65536" width="1">
+		</lwc_object>
+		<lwc_object classname="Relational Foreign Key" color="-16777216" width="1">
+		</lwc_object>
+		<lwc_object classname="Type Substitution" color="-16725996" width="1">
+		</lwc_object>
+		<lwc_object classname="Datatype Reference" color="-16776961" width="1">
+		</lwc_object>
+		<lwc_object classname="Datatype Inheritance" color="-65536" width="1">
+		</lwc_object>
+		<lwc_object classname="Multidimentional Link" color="-16776961" width="1">
+		</lwc_object>
+		<lwc_object classname="Multidimensional Hierarchy" color="-16725996" width="1">
+		</lwc_object>
+		<lwc_object classname="Process Flow" color="-65536" width="1">
+		</lwc_object>
+	</default_line_widths_and_colors>
+	<naming_standard_rules>
+		<logical>
+			<separator value= "Space" char=" "/>
+			<entity>
+			</entity>
+			<attribute>
+			</attribute>
+		</logical>
+		<relational>
+			<separator value= "_" abbreviated_only="false"/>
+			<table>
+			</table>
+			<column>
+			</column>
+		</relational>
+		<domains>
+			<separator value= " "/>
+			<domain>
+			</domain>
+		</domains>
+		<constraints>
+			<pk value="{table}_PK"/>
+			<fk value="{child}_{parent}_FK"/>
+			<ck value="{table}_CK"/>
+			<un value="{table}_{column}_UN"/>
+			<idx value="{table}_{column}_IDX"/>
+			<automatic_idx value="{table}_{column}_IDX"/>
+			<colck value="CK_{table}_{column}"/>
+			<colnnc value="NNC_{table abbr}_{column}"/>
+			<column_foreign_key value="{ref table}_{ref column}"/>
+			<ui value="{entity} PK"/>
+			<relation_attribute value="{ref entity}_{ref attribute}"/>
+			<surrogate_key value="{table abbr}_PK"/>
+			<surrogate_key_col value="{table abbr}_ID"/>
+			<discriminator_col value="{table abbr}_TYPE"/>
+		</constraints>
+		<glossaries>
+		</glossaries>
+	</naming_standard_rules>
+	<comparemapping>
+	</comparemapping>
+	<engineering_params>
+		<delete_without_origin value="false"/>
+		<engineer_coordinates value="true"/>
+		<engineer_generated value="true"/>
+		<show_engineering_intree value="false"/>
+		<apply_naming_std value="true"/>
+		<use_pref_abbreviation value="true"/>
+		<upload_directory value=""/>
+		<date_format value="YYYY/MM/DD HH24:MI:SS"/>
+		<timestamp_format value="YYYY/MM/DD HH24:MI:SS.FF"/>
+		<timestamp_tz_format value="YYYY/MM/DD HH24:MI:SS.FFTZH:TZM"/>
+	</engineering_params>
+	<eng_compare show_sel_prop_only="true" not_apply_for_new_objects="true" exclude_from_tree="false">
+		<entity_table>
+			<property name="Nombre" selected="true"/>
+			<property name="Abreviatura" selected="true"/>
+			<property name="En desuso" selected="true"/>
+			<property name="Comentario" selected="true"/>
+			<property name="Comentarios en RDBMS" selected="true"/>
+			<property name="Notas" selected="true"/>
+			<property name="Ámbito de Tabla Temporal" selected="true"/>
+			<property name="Tipo de Tabla" selected="true"/>
+			<property name="Tipo Estructurado" selected="true"/>
+			<property name="Sustitución de Tipo (Objeto de Supertipo)" selected="true"/>
+			<property name="Permitir Sustitución de Tipo" selected="true"/>
+			<property name="Volúmenes Mínimos" selected="true"/>
+			<property name="Volúmenes Esperados" selected="true"/>
+			<property name="Volúmenes Máximos" selected="true"/>
+			<property name="Porcentaje de Crecimiento" selected="true"/>
+			<property name="Tipo de Crecimiento" selected="true"/>
+			<property name="Formulario Normal::" selected="true"/>
+			<property name="Con Normalización Adecuada" selected="true"/>
+		</entity_table>
+		<attribute_column>
+			<property name="Nombre" selected="true"/>
+			<property name="En desuso" selected="true"/>
+			<property name="Tipo de Dato" selected="true"/>
+			<property name="Clase de Tipo de Dato" selected="true"/>
+			<property name="Obligatorio" selected="true"/>
+			<property name="Valor por Defecto" selected="true"/>
+			<property name="Nombre de Restricción de Control" selected="true"/>
+			<property name="Usar Restricción de Dominio" selected="true"/>
+			<property name="Restricción de Control" selected="true"/>
+			<property name="Restricción de Rango" selected="true"/>
+			<property name="Restricción de LOV" selected="true"/>
+			<property name="Comentario" selected="true"/>
+			<property name="Comentarios en RDBMS" selected="true"/>
+			<property name="Notas" selected="true"/>
+			<property name="Tipo de Origen" selected="true"/>
+			<property name="Descripción de Fórmula" selected="true"/>
+			<property name="Sustitución de Tipo" selected="true"/>
+			<property name="Ámbito" selected="true"/>
+		</attribute_column>
+		<key_index>
+			<property name="Nombre" selected="true"/>
+			<property name="En desuso" selected="true"/>
+			<property name="Comentario" selected="true"/>
+			<property name="Comentarios en RDBMS" selected="true"/>
+			<property name="Notas" selected="true"/>
+			<property name="Clave Primaria" selected="true"/>
+			<property name="Atributos/Columnas" selected="true"/>
+		</key_index>
+		<relation_fk>
+			<property name="Nombre" selected="true"/>
+			<property name="Suprimir Regla" selected="true"/>
+			<property name="Comentario" selected="true"/>
+			<property name="Comentarios en RDBMS" selected="true"/>
+			<property name="Notas" selected="true"/>
+		</relation_fk>
+		<relation_table>
+			<property name="Nombre" selected="true"/>
+			<property name="Comentario" selected="true"/>
+			<property name="Comentarios en RDBMS" selected="true"/>
+			<property name="Notas" selected="true"/>
+		</relation_table>
+		<entityview_view>
+			<property name="Nombre" selected="true"/>
+			<property name="En desuso" selected="true"/>
+			<property name="Comentario" selected="true"/>
+			<property name="Comentarios en RDBMS" selected="true"/>
+			<property name="Notas" selected="true"/>
+			<property name="Tipo Estructurado" selected="true"/>
+			<property name="Sustitución de Tipo (Objeto de Supertipo)" selected="true"/>
+			<property name="WHERE" selected="true"/>
+			<property name="HAVING" selected="true"/>
+			<property name="SQL Definido por el Usuario" selected="true"/>
+		</entityview_view>
+	</eng_compare>
+	<model_compare_props_filter>
+	</model_compare_props_filter>
+	<model_compare_dyn_props_filter>
+	</model_compare_dyn_props_filter>
+	<model_compare_storage_props_filter>
+	</model_compare_storage_props_filter>
+	<naming_options>
+		<model_options objectid="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B">
+			<naming_option class_name="oracle.dbtools.crest.model.design.relational.Table" max_name_length="30" case_type="2" valid_characters="" all_valid="true" />
+			<naming_option class_name="oracle.dbtools.crest.model.design.relational.Column" max_name_length="30" case_type="2" valid_characters="" all_valid="true" />
+			<naming_option class_name="oracle.dbtools.crest.model.design.relational.TableView" max_name_length="30" case_type="2" valid_characters="" all_valid="true" />
+			<naming_option class_name="oracle.dbtools.crest.model.design.constraint.TableLevelConstraint" max_name_length="30" case_type="2" valid_characters="" all_valid="true" />
+			<naming_option class_name="oracle.dbtools.crest.model.design.relational.FKIndexAssociation" max_name_length="30" case_type="2" valid_characters="" all_valid="true" />
+			<naming_option class_name="oracle.dbtools.crest.model.design.relational.Index" max_name_length="30" case_type="2" valid_characters="" all_valid="true" />
+		</model_options>
+		<model_options objectid="6F505A55-3C56-E65E-61AB-E3E34318876E">
+			<naming_option class_name="oracle.dbtools.crest.model.design.logical.Entity" max_name_length="254" case_type="2" valid_characters="" all_valid="true" />
+			<naming_option class_name="oracle.dbtools.crest.model.design.logical.Attribute" max_name_length="254" case_type="2" valid_characters="" all_valid="true" />
+			<naming_option class_name="oracle.dbtools.crest.model.design.logical.EntityView" max_name_length="254" case_type="2" valid_characters="" all_valid="true" />
+		</model_options>
+	</naming_options>
+	<deleted_files>
+	</deleted_files>
+	<dynamic_properties>
+	</dynamic_properties>
+	<design_estimates>
+		<logical_model_estimates>
+			<entities value="70"/>
+			<relations value="70"/>
+			<views value="70"/>
+			<arcs value="70"/>
+		</logical_model_estimates>
+		<data_types_model_estimates>
+			<structured_types value="70"/>
+			<collection_types value="70"/>
+			<distinct_types value="70"/>
+		</data_types_model_estimates>
+		<relational_model_estimates>
+			<relational_model_0_estimates>
+				<relational_model_name value="Relational_1"/>
+				<tables value="70"/>
+				<views value="70"/>
+				<foreign_keys value="70"/>
+				<schemas value="70"/>
+				<subviews value="70"/>
+				<arcs value="70"/>
+			</relational_model_0_estimates>
+		</relational_model_estimates>
+	</design_estimates>
+</settings>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/dmd_open.local b/Design/DB_STRUCTURE/database_design/dmd_open.local
new file mode 100644
index 0000000..19659b5
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/dmd_open.local
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<design id="3C168D0F-3177-9281-C715-B5AB03BB32C4">
+	<models>
+		<model id="351C3A3B-985F-1B54-60FE-A46161E8F350" open="true" open_d_pm="false"/>
+	</models>
+</design>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/logical/Diagrams.local b/Design/DB_STRUCTURE/database_design/logical/Diagrams.local
new file mode 100644
index 0000000..ba42f49
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/logical/Diagrams.local
@@ -0,0 +1,4 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<oracle.dbtools.crest.model.design.logical.LogicalDesign>
+   <object objectType="main_view" objectID="2C149101-C988-9E4D-2C9E-2746FB965570" name="Logical" visible="true"/>
+</oracle.dbtools.crest.model.design.logical.LogicalDesign>
diff --git a/Design/DB_STRUCTURE/database_design/logical/Logical.xml b/Design/DB_STRUCTURE/database_design/logical/Logical.xml
new file mode 100644
index 0000000..7dc2c30
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/logical/Logical.xml
@@ -0,0 +1,7 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<LogicalDesign class="oracle.dbtools.crest.model.design.logical.LogicalDesign" name="Logical" id="6F505A55-3C56-E65E-61AB-E3E34318876E" mainViewID="2C149101-C988-9E4D-2C9E-2746FB965570">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:24:29 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<shouldBeOpen>false</shouldBeOpen>
+</LogicalDesign>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/logical/Objects.local b/Design/DB_STRUCTURE/database_design/logical/Objects.local
new file mode 100644
index 0000000..2113cad
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/logical/Objects.local
@@ -0,0 +1,12 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<oracle.dbtools.crest.model.design.logical.LogicalDesign>
+   <object objectType="Entity" objectID="1558C95F-4CEC-1E30-AA15-58B7C6ACD81B" name="Metadata" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.logical.Entity" propertyParentId="6F505A55-3C56-E65E-61AB-E3E34318876E" propertySourceId="" propertyTargetId=""/>
+   <object objectType="Entity" objectID="FB782D70-50E0-0A98-4654-5E94050F8458" name="Music" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.logical.Entity" propertyParentId="6F505A55-3C56-E65E-61AB-E3E34318876E" propertySourceId="" propertyTargetId=""/>
+   <object objectType="Entity" objectID="52FEBBBF-C76E-AEF4-45C5-3341E59BD946" name="Playlist" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.logical.Entity" propertyParentId="6F505A55-3C56-E65E-61AB-E3E34318876E" propertySourceId="" propertyTargetId=""/>
+   <object objectType="Entity" objectID="312E0255-FAA7-1630-54E5-A4FCB50F6276" name="Preferences" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.logical.Entity" propertyParentId="6F505A55-3C56-E65E-61AB-E3E34318876E" propertySourceId="" propertyTargetId=""/>
+   <object objectType="Entity" objectID="96125017-F1D2-153D-CBAC-D12E0939CF4E" name="User" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.logical.Entity" propertyParentId="6F505A55-3C56-E65E-61AB-E3E34318876E" propertySourceId="" propertyTargetId=""/>
+   <object objectType="Relation" objectID="46906DFA-66DD-2DD5-790C-7A87FFE7755C" name="has" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.logical.Relation" propertyParentId="6F505A55-3C56-E65E-61AB-E3E34318876E" propertySourceId="FB782D70-50E0-0A98-4654-5E94050F8458" propertyTargetId="1558C95F-4CEC-1E30-AA15-58B7C6ACD81B"/>
+   <object objectType="Relation" objectID="DDBAFE8B-B820-1773-EE96-8B363262CAA9" name="History" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.logical.Relation" propertyParentId="6F505A55-3C56-E65E-61AB-E3E34318876E" propertySourceId="96125017-F1D2-153D-CBAC-D12E0939CF4E" propertyTargetId="FB782D70-50E0-0A98-4654-5E94050F8458"/>
+   <object objectType="Relation" objectID="1D1B52B1-8974-5046-5AB7-7AB4BF89C08A" name="Playlist_has_Music" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.logical.Relation" propertyParentId="6F505A55-3C56-E65E-61AB-E3E34318876E" propertySourceId="52FEBBBF-C76E-AEF4-45C5-3341E59BD946" propertyTargetId="FB782D70-50E0-0A98-4654-5E94050F8458"/>
+   <object objectType="Relation" objectID="C49FD692-24A0-3030-2280-A4D5B8CDFC01" name="sets" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.logical.Relation" propertyParentId="6F505A55-3C56-E65E-61AB-E3E34318876E" propertySourceId="96125017-F1D2-153D-CBAC-D12E0939CF4E" propertyTargetId="312E0255-FAA7-1630-54E5-A4FCB50F6276"/>
+</oracle.dbtools.crest.model.design.logical.LogicalDesign>
diff --git a/Design/DB_STRUCTURE/database_design/logical/entity/seg_0/1558C95F-4CEC-1E30-AA15-58B7C6ACD81B.xml b/Design/DB_STRUCTURE/database_design/logical/entity/seg_0/1558C95F-4CEC-1E30-AA15-58B7C6ACD81B.xml
new file mode 100644
index 0000000..10dc797
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/logical/entity/seg_0/1558C95F-4CEC-1E30-AA15-58B7C6ACD81B.xml
@@ -0,0 +1,89 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<Entity class="oracle.dbtools.crest.model.design.logical.Entity" directorySegmentName="seg_0" id="1558C95F-4CEC-1E30-AA15-58B7C6ACD81B" name="Metadata">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:34:31 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<engineerTo>
+<item key="351C3A3B-985F-1B54-60FE-A46161E8F350" value="true"/>
+</engineerTo>
+<adequatelyNormalized>NO</adequatelyNormalized>
+<expectedVolumes>0</expectedVolumes>
+<fwdEngineeringStrategyName>Single Table</fwdEngineeringStrategyName>
+<growthPercent>0</growthPercent>
+<growthType>Year</growthType>
+<maxVolumes>9999999</maxVolumes>
+<minVolumes>0</minVolumes>
+<normalForm>Third</normalForm>
+<attributes itemClass="oracle.dbtools.crest.model.design.logical.Attribute">
+<Attribute name="title" id="49089203-E88B-9C71-4BAB-AA5574F6A82F">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:34:36 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<engineerTo>
+<item key="351C3A3B-985F-1B54-60FE-A46161E8F350" value="true"/>
+</engineerTo>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT024</logicalDatatype>
+<dataTypeSize>256 CHAR</dataTypeSize>
+<ownDataTypeParameters>256 CHAR,,</ownDataTypeParameters>
+</Attribute>
+<Attribute name="artist" id="312A4237-841B-F0D6-219B-47FD4C4AA4AD">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:34:47 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<engineerTo>
+<item key="351C3A3B-985F-1B54-60FE-A46161E8F350" value="true"/>
+</engineerTo>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT024</logicalDatatype>
+<dataTypeSize>256 CHAR</dataTypeSize>
+<ownDataTypeParameters>256 CHAR,,</ownDataTypeParameters>
+</Attribute>
+<Attribute name="cover" id="74912055-663D-B1D1-BE49-9179459CBBCB">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:34:59 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<engineerTo>
+<item key="351C3A3B-985F-1B54-60FE-A46161E8F350" value="true"/>
+</engineerTo>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT040</logicalDatatype>
+<ownDataTypeParameters>,,</ownDataTypeParameters>
+</Attribute>
+<Attribute name="duration" id="1E9D1478-D7E1-147D-DAFA-C42220EE51DC">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:35:02 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<engineerTo>
+<item key="351C3A3B-985F-1B54-60FE-A46161E8F350" value="true"/>
+</engineerTo>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT024</logicalDatatype>
+<dataTypeSize>20 CHAR</dataTypeSize>
+<ownDataTypeParameters>20 CHAR,,</ownDataTypeParameters>
+</Attribute>
+<Attribute name="file_id" id="BA20C781-6605-F30A-9E03-F6286452BDDC">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:43:05 UTC</createdTime>
+<generatorID>46906DFA-66DD-2DD5-790C-7A87FFE7755C</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<engineerTo>
+<item key="351C3A3B-985F-1B54-60FE-A46161E8F350" value="true"/>
+</engineerTo>
+<referedAttribute>CAFF56A3-E241-F64F-19BE-CEA2E258C602</referedAttribute>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT024</logicalDatatype>
+<dataTypeSize>256 CHAR</dataTypeSize>
+<ownDataTypeParameters>,,</ownDataTypeParameters>
+</Attribute>
+</attributes>
+</Entity>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/logical/entity/seg_0/312E0255-FAA7-1630-54E5-A4FCB50F6276.xml b/Design/DB_STRUCTURE/database_design/logical/entity/seg_0/312E0255-FAA7-1630-54E5-A4FCB50F6276.xml
new file mode 100644
index 0000000..096bae2
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/logical/entity/seg_0/312E0255-FAA7-1630-54E5-A4FCB50F6276.xml
@@ -0,0 +1,89 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<Entity class="oracle.dbtools.crest.model.design.logical.Entity" directorySegmentName="seg_0" id="312E0255-FAA7-1630-54E5-A4FCB50F6276" name="Preferences">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:29:16 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<engineerTo>
+<item key="351C3A3B-985F-1B54-60FE-A46161E8F350" value="true"/>
+</engineerTo>
+<adequatelyNormalized>NO</adequatelyNormalized>
+<expectedVolumes>0</expectedVolumes>
+<fwdEngineeringStrategyName>Single Table</fwdEngineeringStrategyName>
+<growthPercent>0</growthPercent>
+<growthType>Year</growthType>
+<maxVolumes>9999999</maxVolumes>
+<minVolumes>0</minVolumes>
+<normalForm>Third</normalForm>
+<attributes itemClass="oracle.dbtools.crest.model.design.logical.Attribute">
+<Attribute name="audio_quality" id="2DFD054F-D34B-E405-1BE4-892DD74BA271">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:29:24 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<engineerTo>
+<item key="351C3A3B-985F-1B54-60FE-A46161E8F350" value="true"/>
+</engineerTo>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT024</logicalDatatype>
+<dataTypeSize>5 CHAR</dataTypeSize>
+<ownDataTypeParameters>5 CHAR,,</ownDataTypeParameters>
+</Attribute>
+<Attribute name="audio_format" id="DA295574-77E1-2B18-8034-394D422AFB44">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:29:37 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<engineerTo>
+<item key="351C3A3B-985F-1B54-60FE-A46161E8F350" value="true"/>
+</engineerTo>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT024</logicalDatatype>
+<dataTypeSize>5 CHAR</dataTypeSize>
+<ownDataTypeParameters>5 CHAR,,</ownDataTypeParameters>
+</Attribute>
+<Attribute name="os" id="6A072B91-6717-56AE-E792-D79219943063">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:29:54 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<engineerTo>
+<item key="351C3A3B-985F-1B54-60FE-A46161E8F350" value="true"/>
+</engineerTo>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT024</logicalDatatype>
+<dataTypeSize>10 CHAR</dataTypeSize>
+<ownDataTypeParameters>10 CHAR,,</ownDataTypeParameters>
+</Attribute>
+<Attribute name="should_ask_metadata" id="861DF039-AE33-7187-ED33-DE8065B1D145">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:30:07 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<engineerTo>
+<item key="351C3A3B-985F-1B54-60FE-A46161E8F350" value="true"/>
+</engineerTo>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT006</logicalDatatype>
+<dataTypeSize>1 BYTE</dataTypeSize>
+<ownDataTypeParameters>1 BYTE,,</ownDataTypeParameters>
+</Attribute>
+<Attribute name="user_id" id="41D91414-1277-D3D5-F7EF-FBB7131C89A4">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:43:31 UTC</createdTime>
+<generatorID>C49FD692-24A0-3030-2280-A4D5B8CDFC01</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<engineerTo>
+<item key="351C3A3B-985F-1B54-60FE-A46161E8F350" value="true"/>
+</engineerTo>
+<referedAttribute>8775EFB1-2319-5282-E470-92105C133D68</referedAttribute>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT011</logicalDatatype>
+<ownDataTypeParameters>,,</ownDataTypeParameters>
+</Attribute>
+</attributes>
+</Entity>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/logical/entity/seg_0/52FEBBBF-C76E-AEF4-45C5-3341E59BD946.xml b/Design/DB_STRUCTURE/database_design/logical/entity/seg_0/52FEBBBF-C76E-AEF4-45C5-3341E59BD946.xml
new file mode 100644
index 0000000..774e49d
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/logical/entity/seg_0/52FEBBBF-C76E-AEF4-45C5-3341E59BD946.xml
@@ -0,0 +1,73 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<Entity class="oracle.dbtools.crest.model.design.logical.Entity" directorySegmentName="seg_0" id="52FEBBBF-C76E-AEF4-45C5-3341E59BD946" name="Playlist">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:37:34 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<engineerTo>
+<item key="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" value="true"/>
+</engineerTo>
+<adequatelyNormalized>NO</adequatelyNormalized>
+<expectedVolumes>0</expectedVolumes>
+<fwdEngineeringStrategyName>Single Table</fwdEngineeringStrategyName>
+<growthPercent>0</growthPercent>
+<growthType>Year</growthType>
+<maxVolumes>9999999</maxVolumes>
+<minVolumes>0</minVolumes>
+<normalForm>Third</normalForm>
+<attributes itemClass="oracle.dbtools.crest.model.design.logical.Attribute">
+<Attribute name="playlist_id" id="16C788DC-D5DE-47B4-78C1-EA4DE822865E">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:37:39 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<engineerTo>
+<item key="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" value="true"/>
+</engineerTo>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT024</logicalDatatype>
+<dataTypeSize>256 CHAR</dataTypeSize>
+<ownDataTypeParameters>256 CHAR,,</ownDataTypeParameters>
+</Attribute>
+<Attribute name="number_elements" id="50EBAA05-F745-2124-1987-2152ACF6FF08">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:38:11 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<engineerTo>
+<item key="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" value="true"/>
+</engineerTo>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT011</logicalDatatype>
+<ownDataTypeParameters>,,</ownDataTypeParameters>
+</Attribute>
+<Attribute name="times_requested" id="41476BC0-DA37-E595-3F64-45358C275271">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:39:24 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<engineerTo>
+<item key="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" value="true"/>
+</engineerTo>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT011</logicalDatatype>
+<ownDataTypeParameters>,,</ownDataTypeParameters>
+</Attribute>
+</attributes>
+<identifiers itemClass="oracle.dbtools.crest.model.design.logical.CandidateKey">
+<identifier id="E3C428C4-0B62-6F66-F2BC-DB1AEE9F9400" name="Playlist PK">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:38:08 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<shouldEngineer>false</shouldEngineer>
+<engineerTo>
+<item key="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" value="false"/>
+</engineerTo>
+<pk>true</pk>
+<usedAttributes>
+<attributeRef>16C788DC-D5DE-47B4-78C1-EA4DE822865E</attributeRef>
+</usedAttributes>
+</identifier>
+</identifiers>
+</Entity>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/logical/entity/seg_0/96125017-F1D2-153D-CBAC-D12E0939CF4E.xml b/Design/DB_STRUCTURE/database_design/logical/entity/seg_0/96125017-F1D2-153D-CBAC-D12E0939CF4E.xml
new file mode 100644
index 0000000..bd61c26
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/logical/entity/seg_0/96125017-F1D2-153D-CBAC-D12E0939CF4E.xml
@@ -0,0 +1,73 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<Entity class="oracle.dbtools.crest.model.design.logical.Entity" directorySegmentName="seg_0" id="96125017-F1D2-153D-CBAC-D12E0939CF4E" name="User">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:28:40 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<engineerTo>
+<item key="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" value="true"/>
+</engineerTo>
+<adequatelyNormalized>NO</adequatelyNormalized>
+<expectedVolumes>0</expectedVolumes>
+<fwdEngineeringStrategyName>Single Table</fwdEngineeringStrategyName>
+<growthPercent>0</growthPercent>
+<growthType>Year</growthType>
+<maxVolumes>9999999</maxVolumes>
+<minVolumes>0</minVolumes>
+<normalForm>Third</normalForm>
+<attributes itemClass="oracle.dbtools.crest.model.design.logical.Attribute">
+<Attribute name="user_id" id="8775EFB1-2319-5282-E470-92105C133D68">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:28:44 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<engineerTo>
+<item key="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" value="true"/>
+</engineerTo>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT011</logicalDatatype>
+<ownDataTypeParameters>,,</ownDataTypeParameters>
+</Attribute>
+<Attribute name="username" id="DD1E5201-1D06-B0BD-F764-99D672888063">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:28:57 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<engineerTo>
+<item key="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" value="true"/>
+</engineerTo>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT024</logicalDatatype>
+<dataTypeSize>45 CHAR</dataTypeSize>
+<ownDataTypeParameters>45 CHAR,,</ownDataTypeParameters>
+</Attribute>
+<Attribute name="name" id="E8A2F3A1-63F6-7D92-7D9A-B9668238C030">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:29:07 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<engineerTo>
+<item key="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" value="true"/>
+</engineerTo>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT040</logicalDatatype>
+<ownDataTypeParameters>,,</ownDataTypeParameters>
+</Attribute>
+</attributes>
+<identifiers itemClass="oracle.dbtools.crest.model.design.logical.CandidateKey">
+<identifier id="3E09607E-650C-5E05-C7AC-0E839F482CA2" name="User PK">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:28:55 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<shouldEngineer>false</shouldEngineer>
+<engineerTo>
+<item key="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" value="false"/>
+</engineerTo>
+<pk>true</pk>
+<usedAttributes>
+<attributeRef>8775EFB1-2319-5282-E470-92105C133D68</attributeRef>
+</usedAttributes>
+</identifier>
+</identifiers>
+</Entity>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/logical/entity/seg_0/FB782D70-50E0-0A98-4654-5E94050F8458.xml b/Design/DB_STRUCTURE/database_design/logical/entity/seg_0/FB782D70-50E0-0A98-4654-5E94050F8458.xml
new file mode 100644
index 0000000..337593d
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/logical/entity/seg_0/FB782D70-50E0-0A98-4654-5E94050F8458.xml
@@ -0,0 +1,114 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<Entity class="oracle.dbtools.crest.model.design.logical.Entity" directorySegmentName="seg_0" id="FB782D70-50E0-0A98-4654-5E94050F8458" name="Music">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:30:33 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<engineerTo>
+<item key="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" value="true"/>
+</engineerTo>
+<adequatelyNormalized>NO</adequatelyNormalized>
+<expectedVolumes>0</expectedVolumes>
+<fwdEngineeringStrategyName>Single Table</fwdEngineeringStrategyName>
+<growthPercent>0</growthPercent>
+<growthType>Year</growthType>
+<maxVolumes>9999999</maxVolumes>
+<minVolumes>0</minVolumes>
+<normalForm>Third</normalForm>
+<attributes itemClass="oracle.dbtools.crest.model.design.logical.Attribute">
+<Attribute name="file_id" id="CAFF56A3-E241-F64F-19BE-CEA2E258C602">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:30:37 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<engineerTo>
+<item key="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" value="true"/>
+</engineerTo>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT024</logicalDatatype>
+<dataTypeSize>256 CHAR</dataTypeSize>
+<ownDataTypeParameters>256 CHAR,,</ownDataTypeParameters>
+</Attribute>
+<Attribute name="video_id" id="F8C2F601-3EC1-B326-E4FF-67F526339C68">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:30:48 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<engineerTo>
+<item key="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" value="true"/>
+</engineerTo>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT024</logicalDatatype>
+<dataTypeSize>20 CHAR</dataTypeSize>
+<ownDataTypeParameters>20 CHAR,,</ownDataTypeParameters>
+</Attribute>
+<Attribute name="audio_quality" id="B61AEEA2-7623-7334-D69C-F52A0DCF68A1">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:31:00 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<engineerTo>
+<item key="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" value="true"/>
+</engineerTo>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT011</logicalDatatype>
+<ownDataTypeParameters>,,</ownDataTypeParameters>
+</Attribute>
+<Attribute name="audio_format" id="5AEEEE54-E69D-8679-E7E7-646D336C8773">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:31:14 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<engineerTo>
+<item key="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" value="true"/>
+</engineerTo>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT011</logicalDatatype>
+<ownDataTypeParameters>,,</ownDataTypeParameters>
+</Attribute>
+<Attribute name="times_requested" id="571F95C4-86B3-8290-242D-003807560AFA">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:31:24 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<engineerTo>
+<item key="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" value="true"/>
+</engineerTo>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT011</logicalDatatype>
+<ownDataTypeParameters>,,</ownDataTypeParameters>
+</Attribute>
+<Attribute name="is_metadata_by_user" id="1017AB39-0480-C236-5621-1E00FD454B4C">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:33:59 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<engineerTo>
+<item key="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" value="true"/>
+</engineerTo>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT006</logicalDatatype>
+<dataTypeSize>1 BYTE</dataTypeSize>
+<ownDataTypeParameters>1 BYTE,,</ownDataTypeParameters>
+</Attribute>
+</attributes>
+<identifiers itemClass="oracle.dbtools.crest.model.design.logical.CandidateKey">
+<identifier id="2F9B98EF-2E48-6530-04A0-1E62A0B7E323" name="Music PK">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:30:47 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<shouldEngineer>false</shouldEngineer>
+<engineerTo>
+<item key="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" value="false"/>
+</engineerTo>
+<pk>true</pk>
+<usedAttributes>
+<attributeRef>CAFF56A3-E241-F64F-19BE-CEA2E258C602</attributeRef>
+</usedAttributes>
+</identifier>
+</identifiers>
+</Entity>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/logical/relation/seg_0/1D1B52B1-8974-5046-5AB7-7AB4BF89C08A.xml b/Design/DB_STRUCTURE/database_design/logical/relation/seg_0/1D1B52B1-8974-5046-5AB7-7AB4BF89C08A.xml
new file mode 100644
index 0000000..af3ba67
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/logical/relation/seg_0/1D1B52B1-8974-5046-5AB7-7AB4BF89C08A.xml
@@ -0,0 +1,20 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<Relation class="oracle.dbtools.crest.model.design.logical.Relation" name="Playlist_has_Music" directorySegmentName="seg_0" id="1D1B52B1-8974-5046-5AB7-7AB4BF89C08A">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:39:41 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<engineerTo>
+<item key="351C3A3B-985F-1B54-60FE-A46161E8F350" value="true"/>
+</engineerTo>
+<sourcePk>E3C428C4-0B62-6F66-F2BC-DB1AEE9F9400</sourcePk>
+<targetPk>2F9B98EF-2E48-6530-04A0-1E62A0B7E323</targetPk>
+<identifying>false</identifying>
+<optionalSource>true</optionalSource>
+<optionalTarget>false</optionalTarget>
+<sourceCardinality>*</sourceCardinality>
+<sourceEntity>52FEBBBF-C76E-AEF4-45C5-3341E59BD946</sourceEntity>
+<targetCardinalityString>*</targetCardinalityString>
+<targetEntity>FB782D70-50E0-0A98-4654-5E94050F8458</targetEntity>
+<transferable>true</transferable>
+<deleteRule>NO ACTION</deleteRule>
+</Relation>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/logical/relation/seg_0/46906DFA-66DD-2DD5-790C-7A87FFE7755C.xml b/Design/DB_STRUCTURE/database_design/logical/relation/seg_0/46906DFA-66DD-2DD5-790C-7A87FFE7755C.xml
new file mode 100644
index 0000000..a643608
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/logical/relation/seg_0/46906DFA-66DD-2DD5-790C-7A87FFE7755C.xml
@@ -0,0 +1,19 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<Relation class="oracle.dbtools.crest.model.design.logical.Relation" name="has" directorySegmentName="seg_0" id="46906DFA-66DD-2DD5-790C-7A87FFE7755C">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:43:05 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<engineerTo>
+<item key="351C3A3B-985F-1B54-60FE-A46161E8F350" value="true"/>
+</engineerTo>
+<sourcePk>2F9B98EF-2E48-6530-04A0-1E62A0B7E323</sourcePk>
+<identifying>false</identifying>
+<optionalSource>true</optionalSource>
+<optionalTarget>false</optionalTarget>
+<sourceCardinality>1</sourceCardinality>
+<sourceEntity>FB782D70-50E0-0A98-4654-5E94050F8458</sourceEntity>
+<targetCardinalityString>1</targetCardinalityString>
+<targetEntity>1558C95F-4CEC-1E30-AA15-58B7C6ACD81B</targetEntity>
+<transferable>true</transferable>
+<deleteRule>CASCADE</deleteRule>
+</Relation>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/logical/relation/seg_0/C49FD692-24A0-3030-2280-A4D5B8CDFC01.xml b/Design/DB_STRUCTURE/database_design/logical/relation/seg_0/C49FD692-24A0-3030-2280-A4D5B8CDFC01.xml
new file mode 100644
index 0000000..08922b3
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/logical/relation/seg_0/C49FD692-24A0-3030-2280-A4D5B8CDFC01.xml
@@ -0,0 +1,19 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<Relation class="oracle.dbtools.crest.model.design.logical.Relation" name="sets" directorySegmentName="seg_0" id="C49FD692-24A0-3030-2280-A4D5B8CDFC01">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:43:31 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<engineerTo>
+<item key="351C3A3B-985F-1B54-60FE-A46161E8F350" value="true"/>
+</engineerTo>
+<sourcePk>3E09607E-650C-5E05-C7AC-0E839F482CA2</sourcePk>
+<identifying>false</identifying>
+<optionalSource>true</optionalSource>
+<optionalTarget>false</optionalTarget>
+<sourceCardinality>1</sourceCardinality>
+<sourceEntity>96125017-F1D2-153D-CBAC-D12E0939CF4E</sourceEntity>
+<targetCardinalityString>1</targetCardinalityString>
+<targetEntity>312E0255-FAA7-1630-54E5-A4FCB50F6276</targetEntity>
+<transferable>true</transferable>
+<deleteRule>CASCADE</deleteRule>
+</Relation>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/logical/relation/seg_0/DDBAFE8B-B820-1773-EE96-8B363262CAA9.xml b/Design/DB_STRUCTURE/database_design/logical/relation/seg_0/DDBAFE8B-B820-1773-EE96-8B363262CAA9.xml
new file mode 100644
index 0000000..1f2266b
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/logical/relation/seg_0/DDBAFE8B-B820-1773-EE96-8B363262CAA9.xml
@@ -0,0 +1,19 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<Relation class="oracle.dbtools.crest.model.design.logical.Relation" name="History" directorySegmentName="seg_0" id="DDBAFE8B-B820-1773-EE96-8B363262CAA9">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:36:55 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<engineerTo>
+<item key="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" value="true"/>
+</engineerTo>
+<targetPk>2F9B98EF-2E48-6530-04A0-1E62A0B7E323</targetPk>
+<identifying>false</identifying>
+<optionalSource>true</optionalSource>
+<optionalTarget>false</optionalTarget>
+<sourceCardinality>*</sourceCardinality>
+<sourceEntity>96125017-F1D2-153D-CBAC-D12E0939CF4E</sourceEntity>
+<targetCardinalityString>*</targetCardinalityString>
+<targetEntity>FB782D70-50E0-0A98-4654-5E94050F8458</targetEntity>
+<transferable>true</transferable>
+<deleteRule>CASCADE</deleteRule>
+</Relation>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/logical/subviews/2C149101-C988-9E4D-2C9E-2746FB965570.xml b/Design/DB_STRUCTURE/database_design/logical/subviews/2C149101-C988-9E4D-2C9E-2746FB965570.xml
new file mode 100644
index 0000000..79d56d6
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/logical/subviews/2C149101-C988-9E4D-2C9E-2746FB965570.xml
@@ -0,0 +1,76 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<Diagram class="oracle.dbtools.crest.swingui.logical.DPVLogical" name="Logical" id="2C149101-C988-9E4D-2C9E-2746FB965570">
+<createdBy>Javier Alonso Silva</createdBy>
+<modifiedBy>Javier Alonso Silva</modifiedBy>
+<createdTime>2018-06-18 14:24:39 UTC</createdTime>
+<autoRoute>false</autoRoute>
+<boxInbox>true</boxInbox>
+<showLegend>false</showLegend>
+<showLabels>false</showLabels>
+<showRelAttributes>false</showRelAttributes>
+<gridEnabled>false</gridEnabled>
+<showGrid>false</showGrid>
+<diagramColor>-1</diagramColor>
+<display>false</display>
+<notation>1</notation>
+<objectViews>
+<OView class="oracle.dbtools.crest.swingui.logical.TVEntity" oid="1558C95F-4CEC-1E30-AA15-58B7C6ACD81B" otype="Entity" vid="E25F6FDB-43A3-B920-0BDC-3C812035D323">
+<hideElementsInCurrentOnly>false</hideElementsInCurrentOnly>
+<bounds x="578" y="285" width="170" height="110"/>
+</OView>
+<OView class="oracle.dbtools.crest.swingui.logical.TVEntity" oid="312E0255-FAA7-1630-54E5-A4FCB50F6276" otype="Entity" vid="753E8511-1D46-AB9A-60AD-1FBB71C19E3D">
+<hideElementsInCurrentOnly>false</hideElementsInCurrentOnly>
+<bounds x="592" y="29" width="170" height="110"/>
+</OView>
+<OView class="oracle.dbtools.crest.swingui.logical.TVEntity" oid="52FEBBBF-C76E-AEF4-45C5-3341E59BD946" otype="Entity" vid="DD60E213-B73F-3C81-0524-A77FA5DD2A3F">
+<hideElementsInCurrentOnly>false</hideElementsInCurrentOnly>
+<bounds x="42" y="289" width="170" height="110"/>
+</OView>
+<OView class="oracle.dbtools.crest.swingui.logical.TVEntity" oid="96125017-F1D2-153D-CBAC-D12E0939CF4E" otype="Entity" vid="1835A4EB-FF4E-AE49-E18C-B55630335F66">
+<hideElementsInCurrentOnly>false</hideElementsInCurrentOnly>
+<bounds x="302" y="31" width="170" height="110"/>
+</OView>
+<OView class="oracle.dbtools.crest.swingui.logical.TVEntity" oid="FB782D70-50E0-0A98-4654-5E94050F8458" otype="Entity" vid="6228CAAB-3F20-C75A-DB18-93B20B112ABE">
+<hideElementsInCurrentOnly>false</hideElementsInCurrentOnly>
+<bounds x="305" y="287" width="170" height="110"/>
+</OView>
+</objectViews>
+<connectors>
+<Connector class="oracle.dbtools.crest.swingui.logical.TVRelation" oid="1D1B52B1-8974-5046-5AB7-7AB4BF89C08A" otype="Relation" vid_source="DD60E213-B73F-3C81-0524-A77FA5DD2A3F" vid_target="6228CAAB-3F20-C75A-DB18-93B20B112ABE">
+<hideElementsInCurrentOnly>false</hideElementsInCurrentOnly>
+<backgroundColor>-16777216</backgroundColor>
+<lineWidth>1</lineWidth>
+<points>
+<point x="212" y="343"/>
+<point x="305" y="343"/>
+</points>
+</Connector>
+<Connector class="oracle.dbtools.crest.swingui.logical.TVRelation" oid="46906DFA-66DD-2DD5-790C-7A87FFE7755C" otype="Relation" vid_source="6228CAAB-3F20-C75A-DB18-93B20B112ABE" vid_target="E25F6FDB-43A3-B920-0BDC-3C812035D323">
+<hideElementsInCurrentOnly>false</hideElementsInCurrentOnly>
+<backgroundColor>-16777216</backgroundColor>
+<lineWidth>1</lineWidth>
+<points>
+<point x="475" y="345"/>
+<point x="578" y="345"/>
+</points>
+</Connector>
+<Connector class="oracle.dbtools.crest.swingui.logical.TVRelation" oid="C49FD692-24A0-3030-2280-A4D5B8CDFC01" otype="Relation" vid_source="1835A4EB-FF4E-AE49-E18C-B55630335F66" vid_target="753E8511-1D46-AB9A-60AD-1FBB71C19E3D">
+<hideElementsInCurrentOnly>false</hideElementsInCurrentOnly>
+<backgroundColor>-16777216</backgroundColor>
+<lineWidth>1</lineWidth>
+<points>
+<point x="472" y="85"/>
+<point x="592" y="85"/>
+</points>
+</Connector>
+<Connector class="oracle.dbtools.crest.swingui.logical.TVRelation" oid="DDBAFE8B-B820-1773-EE96-8B363262CAA9" otype="Relation" vid_source="1835A4EB-FF4E-AE49-E18C-B55630335F66" vid_target="6228CAAB-3F20-C75A-DB18-93B20B112ABE">
+<hideElementsInCurrentOnly>false</hideElementsInCurrentOnly>
+<backgroundColor>-16777216</backgroundColor>
+<lineWidth>1</lineWidth>
+<points>
+<point x="388" y="141"/>
+<point x="388" y="287"/>
+</points>
+</Connector>
+</connectors>
+</Diagram>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/mapping/DeletedMap_RM351C3A3B-985F-1B54-60FE-A46161E8F350.xml b/Design/DB_STRUCTURE/database_design/mapping/DeletedMap_RM351C3A3B-985F-1B54-60FE-A46161E8F350.xml
new file mode 100644
index 0000000..ec75f01
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/mapping/DeletedMap_RM351C3A3B-985F-1B54-60FE-A46161E8F350.xml
@@ -0,0 +1,3 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<RMDeletedMap class="oracle.dbtools.crest.model.xtdmapping.RMDeletedMap">
+</RMDeletedMap>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/mapping/DeletedMap_RMC5DFC5DD-35E9-B422-B2BF-B7648E7DE99B.xml b/Design/DB_STRUCTURE/database_design/mapping/DeletedMap_RMC5DFC5DD-35E9-B422-B2BF-B7648E7DE99B.xml
new file mode 100644
index 0000000..f06a149
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/mapping/DeletedMap_RMC5DFC5DD-35E9-B422-B2BF-B7648E7DE99B.xml
@@ -0,0 +1,7 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<RMDeletedMap class="oracle.dbtools.crest.model.xtdmapping.RMDeletedMap">
+<mappings itemClass="oracle.dbtools.crest.model.xtdmapping.XtdMapping">
+<delm id="DDBAFE8B-8B363262CAA9F6B7459C-4E20587270D8" delID="F6B7459C-5D42-0BCA-091D-4E20587270D8" oDP="6F505A55-3C56-E65E-61AB-E3E34318876E" oID="DDBAFE8B-B820-1773-EE96-8B363262CAA9" oType="3" rSEnt="96125017-F1D2-153D-CBAC-D12E0939CF4E" rTEnt="FB782D70-50E0-0A98-4654-5E94050F8458" tDP="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" tID="F6B7459C-5D42-0BCA-091D-4E20587270D8" tType="8">
+</delm>
+</mappings>
+</RMDeletedMap>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/mapping/ExtendedMap.xml b/Design/DB_STRUCTURE/database_design/mapping/ExtendedMap.xml
new file mode 100644
index 0000000..6811f63
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/mapping/ExtendedMap.xml
@@ -0,0 +1,3 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<ExtendedMap class="oracle.dbtools.crest.model.xtdmapping.ExtendedMap">
+</ExtendedMap>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/mapping/ExtendedMap_RM351C3A3B-985F-1B54-60FE-A46161E8F350.xml b/Design/DB_STRUCTURE/database_design/mapping/ExtendedMap_RM351C3A3B-985F-1B54-60FE-A46161E8F350.xml
new file mode 100644
index 0000000..7ea5df0
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/mapping/ExtendedMap_RM351C3A3B-985F-1B54-60FE-A46161E8F350.xml
@@ -0,0 +1,3 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<RMExtendedMap class="oracle.dbtools.crest.model.xtdmapping.RMExtendedMap">
+</RMExtendedMap>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/mapping/ExtendedMap_RMC5DFC5DD-35E9-B422-B2BF-B7648E7DE99B.xml b/Design/DB_STRUCTURE/database_design/mapping/ExtendedMap_RMC5DFC5DD-35E9-B422-B2BF-B7648E7DE99B.xml
new file mode 100644
index 0000000..a53c215
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/mapping/ExtendedMap_RMC5DFC5DD-35E9-B422-B2BF-B7648E7DE99B.xml
@@ -0,0 +1,86 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<RMExtendedMap class="oracle.dbtools.crest.model.xtdmapping.RMExtendedMap">
+<mappings itemClass="oracle.dbtools.crest.model.xtdmapping.ContainerMapping">
+<CM id="1558C95F-58B7C6ACD81BD1128F38-14F78EDBE4CB" lID="1558C95F-4CEC-1E30-AA15-58B7C6ACD81B" lT="0" rID="D1128F38-5763-FC3D-4FB1-14F78EDBE4CB" rT="4">
+<containedMappings itemClass="oracle.dbtools.crest.model.xtdmapping.RelMapping">
+<Mg id="1E9D1478-C42220EE51DCD23F98D6-42EC7A930AA1" lID="1E9D1478-D7E1-147D-DAFA-C42220EE51DC" rID="D23F98D6-4E09-B8AD-4C7F-42EC7A930AA1">
+</Mg>
+<Mg id="312A4237-47FD4C4AA4AD56FC47A3-E9B1D45E394F" lID="312A4237-841B-F0D6-219B-47FD4C4AA4AD" rID="56FC47A3-F574-6AD0-F406-E9B1D45E394F">
+</Mg>
+<Mg id="49089203-AA5574F6A82F87951F1E-3B5736A6001B" lID="49089203-E88B-9C71-4BAB-AA5574F6A82F" rID="87951F1E-A09B-F590-3B22-3B5736A6001B">
+</Mg>
+<Mg id="74912055-9179459CBBCB0C29B2E8-ADE19E2390B7" lID="74912055-663D-B1D1-BE49-9179459CBBCB" rID="0C29B2E8-7158-1578-5C91-ADE19E2390B7">
+</Mg>
+<Mg id="BA20C781-F6286452BDDC4E2D5316-39DC22832571" lID="BA20C781-6605-F30A-9E03-F6286452BDDC" rID="4E2D5316-C5B0-94A6-D60F-39DC22832571">
+</Mg>
+</containedMappings>
+</CM>
+<CM id="1D1B52B1-7AB4BF89C08A47A181FD-0B7F53C88FB3" lID="1D1B52B1-8974-5046-5AB7-7AB4BF89C08A" lT="3" rID="47A181FD-9D20-6987-2EAE-0B7F53C88FB3" rT="4" rSEnt="52FEBBBF-C76E-AEF4-45C5-3341E59BD946" rTEnt="FB782D70-50E0-0A98-4654-5E94050F8458">
+</CM>
+<CM id="312E0255-A4FCB50F6276D088A558-4F7712E4AEF1" lID="312E0255-FAA7-1630-54E5-A4FCB50F6276" lT="0" rID="D088A558-CA22-9A96-F938-4F7712E4AEF1" rT="4">
+<containedMappings itemClass="oracle.dbtools.crest.model.xtdmapping.RelMapping">
+<Mg id="2DFD054F-892DD74BA271F6A481E9-E8A79D924643" lID="2DFD054F-D34B-E405-1BE4-892DD74BA271" rID="F6A481E9-1265-91A9-3936-E8A79D924643">
+</Mg>
+<Mg id="41D91414-FBB7131C89A4ED4B8B19-E06AA357326F" lID="41D91414-1277-D3D5-F7EF-FBB7131C89A4" rID="ED4B8B19-788A-C6AB-2B29-E06AA357326F">
+</Mg>
+<Mg id="6A072B91-D79219943063559E1A0B-03F5504E9CB2" lID="6A072B91-6717-56AE-E792-D79219943063" rID="559E1A0B-1DD2-CE99-49E2-03F5504E9CB2">
+</Mg>
+<Mg id="861DF039-DE8065B1D1456359C17F-A210438C83E2" lID="861DF039-AE33-7187-ED33-DE8065B1D145" rID="6359C17F-BB55-BF0A-2119-A210438C83E2">
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+</Mg>
+</containedMappings>
+</CM>
+<CM id="52FEBBBF-3341E59BD9460AF231FE-0DFDC72D4D26" lID="52FEBBBF-C76E-AEF4-45C5-3341E59BD946" lT="0" rID="0AF231FE-3CA2-BFD0-E42B-0DFDC72D4D26" rT="4">
+<keysSelection>E3C428C4-0B62-6F66-F2BC-DB1AEE9F9400</keysSelection>
+<containedMappings itemClass="oracle.dbtools.crest.model.xtdmapping.RelMapping">
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+<keysSelection>3E09607E-650C-5E05-C7AC-0E839F482CA2</keysSelection>
+<containedMappings itemClass="oracle.dbtools.crest.model.xtdmapping.RelMapping">
+<Mg id="3E09607E-0E839F482CA2D02538CD-9BD9CDCB8B5D" lID="3E09607E-650C-5E05-C7AC-0E839F482CA2" lT="2" rID="D02538CD-C7A9-1C9E-7706-9BD9CDCB8B5D" rT="7">
+</Mg>
+<Mg id="8775EFB1-92105C133D687794EE2F-DF17DC38EB8E" lID="8775EFB1-2319-5282-E470-92105C133D68" rID="7794EE2F-2CCF-4261-4CE3-DF17DC38EB8E">
+</Mg>
+<Mg id="DD1E5201-99D67288806305A6D064-9F505F814098" lID="DD1E5201-1D06-B0BD-F764-99D672888063" rID="05A6D064-A844-05CE-EA54-9F505F814098">
+</Mg>
+<Mg id="E8A2F3A1-B9668238C030BADE10A9-E59863AAF4E8" lID="E8A2F3A1-63F6-7D92-7D9A-B9668238C030" rID="BADE10A9-0873-F33A-619F-E59863AAF4E8">
+</Mg>
+</containedMappings>
+</CM>
+<CM id="DDBAFE8B-8B363262CAA9F0AD5A40-595FD0DB5F39" lID="DDBAFE8B-B820-1773-EE96-8B363262CAA9" lT="3" rID="F0AD5A40-5659-C806-BEA1-595FD0DB5F39" rT="4" rSEnt="96125017-F1D2-153D-CBAC-D12E0939CF4E" rTEnt="FB782D70-50E0-0A98-4654-5E94050F8458">
+</CM>
+<CM id="FB782D70-5E94050F845825DE0936-9EAA1E0DA843" lID="FB782D70-50E0-0A98-4654-5E94050F8458" lT="0" rID="25DE0936-5106-79A2-1678-9EAA1E0DA843" rT="4">
+<keysSelection>2F9B98EF-2E48-6530-04A0-1E62A0B7E323</keysSelection>
+<containedMappings itemClass="oracle.dbtools.crest.model.xtdmapping.RelMapping">
+<Mg id="1017AB39-1E00FD454B4CC3FBA2D2-1E5273DF1069" lID="1017AB39-0480-C236-5621-1E00FD454B4C" rID="C3FBA2D2-F257-F159-AFD9-1E5273DF1069">
+</Mg>
+<Mg id="2F9B98EF-1E62A0B7E3235EE86BBE-B287A7214DD4" lID="2F9B98EF-2E48-6530-04A0-1E62A0B7E323" lT="2" rID="5EE86BBE-3C43-6A0D-DECB-B287A7214DD4" rT="7">
+</Mg>
+<Mg id="571F95C4-003807560AFA1B8B92C7-852EBEE2F1C4" lID="571F95C4-86B3-8290-242D-003807560AFA" rID="1B8B92C7-16C5-D32F-C04B-852EBEE2F1C4">
+</Mg>
+<Mg id="5AEEEE54-646D336C8773CC8C045A-2BD3B4510BD6" lID="5AEEEE54-E69D-8679-E7E7-646D336C8773" rID="CC8C045A-384B-03FC-28A5-2BD3B4510BD6">
+</Mg>
+<Mg id="B61AEEA2-F52A0DCF68A11A16F378-6E480A73D80F" lID="B61AEEA2-7623-7334-D69C-F52A0DCF68A1" rID="1A16F378-0DFC-2403-B78D-6E480A73D80F">
+</Mg>
+<Mg id="CAFF56A3-CEA2E258C6021F1E7DDA-CC9CC8B4A8FB" lID="CAFF56A3-E241-F64F-19BE-CEA2E258C602" rID="1F1E7DDA-F1AD-9264-27B3-CC9CC8B4A8FB">
+</Mg>
+<Mg id="F8C2F601-67F526339C68B2272C58-C89F6F6E72A5" lID="F8C2F601-3EC1-B326-E4FF-67F526339C68" rID="B2272C58-988F-9FD9-CD26-C89F6F6E72A5">
+</Mg>
+</containedMappings>
+</CM>
+<CM id="46906DFA-7A87FFE7755C6A45C1C6-BA841A05B730" lID="46906DFA-66DD-2DD5-790C-7A87FFE7755C" lT="3" rID="6A45C1C6-8C3B-317C-9221-BA841A05B730" rT="8" rSEnt="FB782D70-50E0-0A98-4654-5E94050F8458" rTEnt="1558C95F-4CEC-1E30-AA15-58B7C6ACD81B">
+</CM>
+<CM id="C49FD692-A4D5B8CDFC01C7DC4550-5E37D6D8832D" lID="C49FD692-24A0-3030-2280-A4D5B8CDFC01" lT="3" rID="C7DC4550-6D2C-B38B-5C23-5E37D6D8832D" rT="8" rSEnt="96125017-F1D2-153D-CBAC-D12E0939CF4E" rTEnt="312E0255-FAA7-1630-54E5-A4FCB50F6276">
+</CM>
+</mappings>
+</RMExtendedMap>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/pm/Objects.local b/Design/DB_STRUCTURE/database_design/pm/Objects.local
new file mode 100644
index 0000000..385decc
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/pm/Objects.local
@@ -0,0 +1,2 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<oracle.dbtools.crest.model.design.process.ProcessModel/>
diff --git a/Design/DB_STRUCTURE/database_design/pm/Process Model.xml b/Design/DB_STRUCTURE/database_design/pm/Process Model.xml
new file mode 100644
index 0000000..7811946
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/pm/Process Model.xml	
@@ -0,0 +1,7 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<ProcessModel class="oracle.dbtools.crest.model.design.process.ProcessModel" name="Process Model" id="3894222A-16DA-CB7E-8FD8-A9963D603342">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:24:30 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<shouldBeOpen>false</shouldBeOpen>
+</ProcessModel>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/rdbms/database_design_RDBMSSites.xml b/Design/DB_STRUCTURE/database_design/rdbms/database_design_RDBMSSites.xml
new file mode 100644
index 0000000..42c1454
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/rdbms/database_design_RDBMSSites.xml
@@ -0,0 +1,2 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<metadatadoc version="2.0"/>
diff --git a/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B.xml b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B.xml
new file mode 100644
index 0000000..0cdf79c
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B.xml
@@ -0,0 +1,8 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<relationalModel class="oracle.dbtools.crest.model.design.relational.RelationalDesign" name="Relational_1" id="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" mainViewID="DDF9FCBE-2830-5AB6-3DD0-B2CFAA840673">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:04 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<shouldBeOpen>false</shouldBeOpen>
+<selectedRDBMSSite>32076570-2523-435C-2E92-BF29817DFF70</selectedRDBMSSite>
+</relationalModel>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/DDLSelection.local b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/DDLSelection.local
new file mode 100644
index 0000000..5a4a6b6
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/DDLSelection.local
@@ -0,0 +1,2 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<oracle.dbtools.crest.model.design.relational.RelationalDesign objectID="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B"/>
diff --git a/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/Diagrams.local b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/Diagrams.local
new file mode 100644
index 0000000..11539ab
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/Diagrams.local
@@ -0,0 +1,4 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<oracle.dbtools.crest.model.design.relational.RelationalDesign>
+   <object objectType="main_view" objectID="DDF9FCBE-2830-5AB6-3DD0-B2CFAA840673" name="Relational_1" visible="true"/>
+</oracle.dbtools.crest.model.design.relational.RelationalDesign>
diff --git a/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/Objects.local b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/Objects.local
new file mode 100644
index 0000000..581f249
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/Objects.local
@@ -0,0 +1,16 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<oracle.dbtools.crest.model.design.relational.RelationalDesign>
+   <object objectType="Table" objectID="F0AD5A40-5659-C806-BEA1-595FD0DB5F39" name="History" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.relational.Table" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="" propertyTargetId=""/>
+   <object objectType="Table" objectID="D1128F38-5763-FC3D-4FB1-14F78EDBE4CB" name="Metadata" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.relational.Table" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="" propertyTargetId=""/>
+   <object objectType="Table" objectID="25DE0936-5106-79A2-1678-9EAA1E0DA843" name="Music" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.relational.Table" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="" propertyTargetId=""/>
+   <object objectType="Table" objectID="0AF231FE-3CA2-BFD0-E42B-0DFDC72D4D26" name="Playlist" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.relational.Table" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="" propertyTargetId=""/>
+   <object objectType="Table" objectID="47A181FD-9D20-6987-2EAE-0B7F53C88FB3" name="Playlist_has_Music" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.relational.Table" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="" propertyTargetId=""/>
+   <object objectType="Table" objectID="D088A558-CA22-9A96-F938-4F7712E4AEF1" name="Preferences" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.relational.Table" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="" propertyTargetId=""/>
+   <object objectType="Table" objectID="175D64CD-6D93-E0AE-DD13-FF75CAB2DC92" name="User" seqName="seg_0" propertyClassName="oracle.dbtools.crest.model.design.relational.Table" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="" propertyTargetId=""/>
+   <object objectType="FKIndexAssociation" objectID="14761BF2-0284-F09E-1C36-5AD59C18B84E" name="History_Music_FK" seqName="seg_0" containerID="F0AD5A40-5659-C806-BEA1-595FD0DB5F39" refContainerID="25DE0936-5106-79A2-1678-9EAA1E0DA843" propertyClassName="oracle.dbtools.crest.model.design.relational.FKIndexAssociation" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="25DE0936-5106-79A2-1678-9EAA1E0DA843" propertyTargetId="F0AD5A40-5659-C806-BEA1-595FD0DB5F39"/>
+   <object objectType="FKIndexAssociation" objectID="6AA622A5-D308-C63C-2AF6-730CF06EBF34" name="History_User_FK" seqName="seg_0" containerID="F0AD5A40-5659-C806-BEA1-595FD0DB5F39" refContainerID="175D64CD-6D93-E0AE-DD13-FF75CAB2DC92" propertyClassName="oracle.dbtools.crest.model.design.relational.FKIndexAssociation" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="175D64CD-6D93-E0AE-DD13-FF75CAB2DC92" propertyTargetId="F0AD5A40-5659-C806-BEA1-595FD0DB5F39"/>
+   <object objectType="FKIndexAssociation" objectID="6A45C1C6-8C3B-317C-9221-BA841A05B730" name="Metadata_Music_FK" seqName="seg_0" containerID="D1128F38-5763-FC3D-4FB1-14F78EDBE4CB" refContainerID="25DE0936-5106-79A2-1678-9EAA1E0DA843" propertyClassName="oracle.dbtools.crest.model.design.relational.FKIndexAssociation" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="25DE0936-5106-79A2-1678-9EAA1E0DA843" propertyTargetId="D1128F38-5763-FC3D-4FB1-14F78EDBE4CB"/>
+   <object objectType="FKIndexAssociation" objectID="B59DC6EC-C75B-86D4-AFA3-705630B49873" name="Playlist_has_Music_Music_FK" seqName="seg_0" containerID="47A181FD-9D20-6987-2EAE-0B7F53C88FB3" refContainerID="25DE0936-5106-79A2-1678-9EAA1E0DA843" propertyClassName="oracle.dbtools.crest.model.design.relational.FKIndexAssociation" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="25DE0936-5106-79A2-1678-9EAA1E0DA843" propertyTargetId="47A181FD-9D20-6987-2EAE-0B7F53C88FB3"/>
+   <object objectType="FKIndexAssociation" objectID="518E00B2-30C8-083A-0841-D61034BE188E" name="Playlist_has_Music_Playlist_FK" seqName="seg_0" containerID="47A181FD-9D20-6987-2EAE-0B7F53C88FB3" refContainerID="0AF231FE-3CA2-BFD0-E42B-0DFDC72D4D26" propertyClassName="oracle.dbtools.crest.model.design.relational.FKIndexAssociation" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="0AF231FE-3CA2-BFD0-E42B-0DFDC72D4D26" propertyTargetId="47A181FD-9D20-6987-2EAE-0B7F53C88FB3"/>
+   <object objectType="FKIndexAssociation" objectID="C7DC4550-6D2C-B38B-5C23-5E37D6D8832D" name="Preferences_User_FK" seqName="seg_0" containerID="D088A558-CA22-9A96-F938-4F7712E4AEF1" refContainerID="175D64CD-6D93-E0AE-DD13-FF75CAB2DC92" propertyClassName="oracle.dbtools.crest.model.design.relational.FKIndexAssociation" propertyParentId="C5DFC5DD-35E9-B422-B2BF-B7648E7DE99B" propertySourceId="175D64CD-6D93-E0AE-DD13-FF75CAB2DC92" propertyTargetId="D088A558-CA22-9A96-F938-4F7712E4AEF1"/>
+</oracle.dbtools.crest.model.design.relational.RelationalDesign>
diff --git a/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/foreignkey/seg_0/14761BF2-0284-F09E-1C36-5AD59C18B84E.xml b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/foreignkey/seg_0/14761BF2-0284-F09E-1C36-5AD59C18B84E.xml
new file mode 100644
index 0000000..5e7fa5f
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/foreignkey/seg_0/14761BF2-0284-F09E-1C36-5AD59C18B84E.xml
@@ -0,0 +1,17 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<FKIndexAssociation class="oracle.dbtools.crest.model.design.relational.FKIndexAssociation" directorySegmentName="seg_0" id="14761BF2-0284-F09E-1C36-5AD59C18B84E" containerWithKeyObject="F0AD5A40-5659-C806-BEA1-595FD0DB5F39" localFKIndex="F4787963-BEB2-ACB7-3BF2-7B6E392B75DE" name="History_Music_FK">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:53:19 UTC</createdTime>
+<generatorID>DDBAFE8B-B820-1773-EE96-8B363262CAA9</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<referredTableLongName>Music</referredTableLongName>
+<deleteRule>CASCADE</deleteRule>
+<referredTableID>25DE0936-5106-79A2-1678-9EAA1E0DA843</referredTableID>
+<keyObject>5EE86BBE-3C43-6A0D-DECB-B287A7214DD4</keyObject>
+<referredKeyID>5EE86BBE-3C43-6A0D-DECB-B287A7214DD4</referredKeyID>
+<mandatory>true</mandatory>
+<refColNames>file_id</refColNames>
+<transferable>true</transferable>
+<rely>false</rely>
+<columnDependencyConstraintGenerateInDDL>true</columnDependencyConstraintGenerateInDDL>
+</FKIndexAssociation>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/foreignkey/seg_0/518E00B2-30C8-083A-0841-D61034BE188E.xml b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/foreignkey/seg_0/518E00B2-30C8-083A-0841-D61034BE188E.xml
new file mode 100644
index 0000000..9295929
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/foreignkey/seg_0/518E00B2-30C8-083A-0841-D61034BE188E.xml
@@ -0,0 +1,17 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<FKIndexAssociation class="oracle.dbtools.crest.model.design.relational.FKIndexAssociation" directorySegmentName="seg_0" id="518E00B2-30C8-083A-0841-D61034BE188E" containerWithKeyObject="47A181FD-9D20-6987-2EAE-0B7F53C88FB3" localFKIndex="2E42E7DB-DC1C-B6A6-1678-89DFBEE716F9" name="Playlist_has_Music_Playlist_FK">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>1D1B52B1-8974-5046-5AB7-7AB4BF89C08A</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<referredTableLongName>Playlist</referredTableLongName>
+<deleteRule>NO ACTION</deleteRule>
+<referredTableID>0AF231FE-3CA2-BFD0-E42B-0DFDC72D4D26</referredTableID>
+<keyObject>0AAA742E-85E9-ABBB-3457-D0D166522D31</keyObject>
+<referredKeyID>0AAA742E-85E9-ABBB-3457-D0D166522D31</referredKeyID>
+<mandatory>true</mandatory>
+<refColNames>playlist_id</refColNames>
+<transferable>true</transferable>
+<rely>false</rely>
+<columnDependencyConstraintGenerateInDDL>true</columnDependencyConstraintGenerateInDDL>
+</FKIndexAssociation>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/foreignkey/seg_0/6A45C1C6-8C3B-317C-9221-BA841A05B730.xml b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/foreignkey/seg_0/6A45C1C6-8C3B-317C-9221-BA841A05B730.xml
new file mode 100644
index 0000000..6eb319e
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/foreignkey/seg_0/6A45C1C6-8C3B-317C-9221-BA841A05B730.xml
@@ -0,0 +1,17 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<FKIndexAssociation class="oracle.dbtools.crest.model.design.relational.FKIndexAssociation" directorySegmentName="seg_0" id="6A45C1C6-8C3B-317C-9221-BA841A05B730" containerWithKeyObject="D1128F38-5763-FC3D-4FB1-14F78EDBE4CB" localFKIndex="A0664BE3-7AF8-ED5A-E836-901C1922B6FB" name="Metadata_Music_FK">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>46906DFA-66DD-2DD5-790C-7A87FFE7755C</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<referredTableLongName>Music</referredTableLongName>
+<deleteRule>CASCADE</deleteRule>
+<referredTableID>25DE0936-5106-79A2-1678-9EAA1E0DA843</referredTableID>
+<keyObject>5EE86BBE-3C43-6A0D-DECB-B287A7214DD4</keyObject>
+<referredKeyID>5EE86BBE-3C43-6A0D-DECB-B287A7214DD4</referredKeyID>
+<mandatory>true</mandatory>
+<refColNames>file_id</refColNames>
+<transferable>true</transferable>
+<rely>false</rely>
+<columnDependencyConstraintGenerateInDDL>true</columnDependencyConstraintGenerateInDDL>
+</FKIndexAssociation>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/foreignkey/seg_0/6AA622A5-D308-C63C-2AF6-730CF06EBF34.xml b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/foreignkey/seg_0/6AA622A5-D308-C63C-2AF6-730CF06EBF34.xml
new file mode 100644
index 0000000..79bad92
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/foreignkey/seg_0/6AA622A5-D308-C63C-2AF6-730CF06EBF34.xml
@@ -0,0 +1,17 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<FKIndexAssociation class="oracle.dbtools.crest.model.design.relational.FKIndexAssociation" directorySegmentName="seg_0" id="6AA622A5-D308-C63C-2AF6-730CF06EBF34" containerWithKeyObject="F0AD5A40-5659-C806-BEA1-595FD0DB5F39" localFKIndex="7854E7A3-36BD-5278-CD52-59B6D1C94E9E" name="History_User_FK">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:53:19 UTC</createdTime>
+<generatorID>DDBAFE8B-B820-1773-EE96-8B363262CAA9</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<referredTableLongName>User</referredTableLongName>
+<deleteRule>CASCADE</deleteRule>
+<referredTableID>175D64CD-6D93-E0AE-DD13-FF75CAB2DC92</referredTableID>
+<keyObject>D02538CD-C7A9-1C9E-7706-9BD9CDCB8B5D</keyObject>
+<referredKeyID>D02538CD-C7A9-1C9E-7706-9BD9CDCB8B5D</referredKeyID>
+<mandatory>true</mandatory>
+<refColNames>user_id</refColNames>
+<transferable>true</transferable>
+<rely>false</rely>
+<columnDependencyConstraintGenerateInDDL>true</columnDependencyConstraintGenerateInDDL>
+</FKIndexAssociation>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/foreignkey/seg_0/B59DC6EC-C75B-86D4-AFA3-705630B49873.xml b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/foreignkey/seg_0/B59DC6EC-C75B-86D4-AFA3-705630B49873.xml
new file mode 100644
index 0000000..ba83f9b
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/foreignkey/seg_0/B59DC6EC-C75B-86D4-AFA3-705630B49873.xml
@@ -0,0 +1,17 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<FKIndexAssociation class="oracle.dbtools.crest.model.design.relational.FKIndexAssociation" directorySegmentName="seg_0" id="B59DC6EC-C75B-86D4-AFA3-705630B49873" containerWithKeyObject="47A181FD-9D20-6987-2EAE-0B7F53C88FB3" localFKIndex="40965CD0-1F34-A725-D6F7-9DE5157A00AD" name="Playlist_has_Music_Music_FK">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>1D1B52B1-8974-5046-5AB7-7AB4BF89C08A</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<referredTableLongName>Music</referredTableLongName>
+<deleteRule>NO ACTION</deleteRule>
+<referredTableID>25DE0936-5106-79A2-1678-9EAA1E0DA843</referredTableID>
+<keyObject>5EE86BBE-3C43-6A0D-DECB-B287A7214DD4</keyObject>
+<referredKeyID>5EE86BBE-3C43-6A0D-DECB-B287A7214DD4</referredKeyID>
+<mandatory>true</mandatory>
+<refColNames>file_id</refColNames>
+<transferable>true</transferable>
+<rely>false</rely>
+<columnDependencyConstraintGenerateInDDL>true</columnDependencyConstraintGenerateInDDL>
+</FKIndexAssociation>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/foreignkey/seg_0/C7DC4550-6D2C-B38B-5C23-5E37D6D8832D.xml b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/foreignkey/seg_0/C7DC4550-6D2C-B38B-5C23-5E37D6D8832D.xml
new file mode 100644
index 0000000..85fe559
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/foreignkey/seg_0/C7DC4550-6D2C-B38B-5C23-5E37D6D8832D.xml
@@ -0,0 +1,17 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<FKIndexAssociation class="oracle.dbtools.crest.model.design.relational.FKIndexAssociation" directorySegmentName="seg_0" id="C7DC4550-6D2C-B38B-5C23-5E37D6D8832D" containerWithKeyObject="D088A558-CA22-9A96-F938-4F7712E4AEF1" localFKIndex="83FE0090-5C03-399C-F8A0-507E18B766B4" name="Preferences_User_FK">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>C49FD692-24A0-3030-2280-A4D5B8CDFC01</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<referredTableLongName>User</referredTableLongName>
+<deleteRule>CASCADE</deleteRule>
+<referredTableID>175D64CD-6D93-E0AE-DD13-FF75CAB2DC92</referredTableID>
+<keyObject>D02538CD-C7A9-1C9E-7706-9BD9CDCB8B5D</keyObject>
+<referredKeyID>D02538CD-C7A9-1C9E-7706-9BD9CDCB8B5D</referredKeyID>
+<mandatory>true</mandatory>
+<refColNames>user_id</refColNames>
+<transferable>true</transferable>
+<rely>false</rely>
+<columnDependencyConstraintGenerateInDDL>true</columnDependencyConstraintGenerateInDDL>
+</FKIndexAssociation>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/subviews/DDF9FCBE-2830-5AB6-3DD0-B2CFAA840673.xml b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/subviews/DDF9FCBE-2830-5AB6-3DD0-B2CFAA840673.xml
new file mode 100644
index 0000000..f612e0b
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/subviews/DDF9FCBE-2830-5AB6-3DD0-B2CFAA840673.xml
@@ -0,0 +1,102 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<Diagram class="oracle.dbtools.crest.swingui.relational.DPVRelational" name="Relational_1" id="DDF9FCBE-2830-5AB6-3DD0-B2CFAA840673">
+<createdBy>Javier Alonso Silva</createdBy>
+<modifiedBy>Javier Alonso Silva</modifiedBy>
+<createdTime>2018-06-18 14:51:04 UTC</createdTime>
+<autoRoute>false</autoRoute>
+<boxInbox>true</boxInbox>
+<showLegend>false</showLegend>
+<showLabels>false</showLabels>
+<showRelAttributes>false</showRelAttributes>
+<gridEnabled>false</gridEnabled>
+<showGrid>false</showGrid>
+<diagramColor>-1</diagramColor>
+<display>false</display>
+<notation>1</notation>
+<objectViews>
+<OView class="oracle.dbtools.crest.swingui.relational.TVTable" oid="0AF231FE-3CA2-BFD0-E42B-0DFDC72D4D26" otype="Table" vid="EE21C7FE-C85E-5A2F-1C78-65A01371BC3B">
+<hideElementsInCurrentOnly>false</hideElementsInCurrentOnly>
+<bounds x="42" y="289" width="251" height="110"/>
+</OView>
+<OView class="oracle.dbtools.crest.swingui.relational.TVTable" oid="175D64CD-6D93-E0AE-DD13-FF75CAB2DC92" otype="Table" vid="D2EC0BC0-F700-1329-2716-2C21984B5622">
+<hideElementsInCurrentOnly>false</hideElementsInCurrentOnly>
+<bounds x="402" y="426" width="205" height="110"/>
+</OView>
+<OView class="oracle.dbtools.crest.swingui.relational.TVTable" oid="25DE0936-5106-79A2-1678-9EAA1E0DA843" otype="Table" vid="2EF161ED-9225-9235-FB82-8D46B46E7C99">
+<hideElementsInCurrentOnly>false</hideElementsInCurrentOnly>
+<bounds x="382" y="38" width="265" height="132"/>
+</OView>
+<OView class="oracle.dbtools.crest.swingui.relational.TVTable" oid="47A181FD-9D20-6987-2EAE-0B7F53C88FB3" otype="Table" vid="44FE6C73-9DC7-1AD1-9776-430C14CF03AD">
+<hideElementsInCurrentOnly>false</hideElementsInCurrentOnly>
+<bounds x="2" y="30" width="306" height="112"/>
+</OView>
+<OView class="oracle.dbtools.crest.swingui.relational.TVTable" oid="D088A558-CA22-9A96-F938-4F7712E4AEF1" otype="Table" vid="A05D5803-ED8E-B325-BEA5-C740A63CE2DF">
+<hideElementsInCurrentOnly>false</hideElementsInCurrentOnly>
+<bounds x="677" y="415" width="257" height="138"/>
+</OView>
+<OView class="oracle.dbtools.crest.swingui.relational.TVTable" oid="D1128F38-5763-FC3D-4FB1-14F78EDBE4CB" otype="Table" vid="D81A6E47-E007-9797-50BE-F7FF859B5323">
+<hideElementsInCurrentOnly>false</hideElementsInCurrentOnly>
+<bounds x="740" y="40" width="227" height="138"/>
+</OView>
+<OView class="oracle.dbtools.crest.swingui.relational.TVTable" oid="F0AD5A40-5659-C806-BEA1-595FD0DB5F39" otype="Table" vid="CA7E6911-92B6-3662-B80D-2237D96C2937">
+<hideElementsInCurrentOnly>false</hideElementsInCurrentOnly>
+<bounds x="396" y="238" width="235" height="118"/>
+</OView>
+</objectViews>
+<connectors>
+<Connector class="oracle.dbtools.crest.swingui.relational.TVFKRelation" oid="14761BF2-0284-F09E-1C36-5AD59C18B84E" otype="FKIndexAssociation" vid_source="2EF161ED-9225-9235-FB82-8D46B46E7C99" vid_target="CA7E6911-92B6-3662-B80D-2237D96C2937">
+<hideElementsInCurrentOnly>false</hideElementsInCurrentOnly>
+<backgroundColor>-16777216</backgroundColor>
+<lineWidth>1</lineWidth>
+<points>
+<point x="498" y="170"/>
+<point x="498" y="238"/>
+</points>
+</Connector>
+<Connector class="oracle.dbtools.crest.swingui.relational.TVFKRelation" oid="518E00B2-30C8-083A-0841-D61034BE188E" otype="FKIndexAssociation" vid_source="EE21C7FE-C85E-5A2F-1C78-65A01371BC3B" vid_target="44FE6C73-9DC7-1AD1-9776-430C14CF03AD">
+<hideElementsInCurrentOnly>false</hideElementsInCurrentOnly>
+<backgroundColor>-16777216</backgroundColor>
+<lineWidth>1</lineWidth>
+<points>
+<point x="167" y="289"/>
+<point x="167" y="142"/>
+</points>
+</Connector>
+<Connector class="oracle.dbtools.crest.swingui.relational.TVFKRelation" oid="6A45C1C6-8C3B-317C-9221-BA841A05B730" otype="FKIndexAssociation" vid_source="2EF161ED-9225-9235-FB82-8D46B46E7C99" vid_target="D81A6E47-E007-9797-50BE-F7FF859B5323">
+<hideElementsInCurrentOnly>false</hideElementsInCurrentOnly>
+<backgroundColor>-16777216</backgroundColor>
+<lineWidth>1</lineWidth>
+<points>
+<point x="647" y="105"/>
+<point x="740" y="105"/>
+</points>
+</Connector>
+<Connector class="oracle.dbtools.crest.swingui.relational.TVFKRelation" oid="6AA622A5-D308-C63C-2AF6-730CF06EBF34" otype="FKIndexAssociation" vid_source="D2EC0BC0-F700-1329-2716-2C21984B5622" vid_target="CA7E6911-92B6-3662-B80D-2237D96C2937">
+<hideElementsInCurrentOnly>false</hideElementsInCurrentOnly>
+<backgroundColor>-16777216</backgroundColor>
+<lineWidth>1</lineWidth>
+<points>
+<point x="504" y="426"/>
+<point x="504" y="356"/>
+</points>
+</Connector>
+<Connector class="oracle.dbtools.crest.swingui.relational.TVFKRelation" oid="B59DC6EC-C75B-86D4-AFA3-705630B49873" otype="FKIndexAssociation" vid_source="2EF161ED-9225-9235-FB82-8D46B46E7C99" vid_target="44FE6C73-9DC7-1AD1-9776-430C14CF03AD">
+<hideElementsInCurrentOnly>false</hideElementsInCurrentOnly>
+<backgroundColor>-16777216</backgroundColor>
+<lineWidth>1</lineWidth>
+<points>
+<point x="382" y="90"/>
+<point x="308" y="90"/>
+</points>
+</Connector>
+<Connector class="oracle.dbtools.crest.swingui.relational.TVFKRelation" oid="C7DC4550-6D2C-B38B-5C23-5E37D6D8832D" otype="FKIndexAssociation" vid_source="D2EC0BC0-F700-1329-2716-2C21984B5622" vid_target="A05D5803-ED8E-B325-BEA5-C740A63CE2DF">
+<hideElementsInCurrentOnly>false</hideElementsInCurrentOnly>
+<backgroundColor>-16777216</backgroundColor>
+<lineWidth>1</lineWidth>
+<points>
+<point x="472" y="141"/>
+<point x="677" y="481"/>
+</points>
+</Connector>
+</connectors>
+</Diagram>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/table/seg_0/0AF231FE-3CA2-BFD0-E42B-0DFDC72D4D26.xml b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/table/seg_0/0AF231FE-3CA2-BFD0-E42B-0DFDC72D4D26.xml
new file mode 100644
index 0000000..0451d83
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/table/seg_0/0AF231FE-3CA2-BFD0-E42B-0DFDC72D4D26.xml
@@ -0,0 +1,62 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<Table class="oracle.dbtools.crest.model.design.relational.Table" directorySegmentName="seg_0" id="0AF231FE-3CA2-BFD0-E42B-0DFDC72D4D26" name="Playlist">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>52FEBBBF-C76E-AEF4-45C5-3341E59BD946</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<allowColumnReorder>false</allowColumnReorder>
+<existDependencyGenerateInDDl>true</existDependencyGenerateInDDl>
+<parsed>true</parsed>
+<columns itemClass="oracle.dbtools.crest.model.design.relational.Column">
+<Column name="playlist_id" id="9961C1BD-DFE5-9B3E-1C5F-5FEAC633680C">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>16C788DC-D5DE-47B4-78C1-EA4DE822865E</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT024</logicalDatatype>
+<dataTypeSize>256 CHAR</dataTypeSize>
+<ownDataTypeParameters>256 CHAR,,</ownDataTypeParameters>
+<autoIncrementCycle>false</autoIncrementCycle>
+</Column>
+<Column name="number_elements" id="FCF3FE68-0794-7824-3D90-D04D9CF45D1F">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>50EBAA05-F745-2124-1987-2152ACF6FF08</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT011</logicalDatatype>
+<ownDataTypeParameters>,,</ownDataTypeParameters>
+<autoIncrementCycle>false</autoIncrementCycle>
+</Column>
+<Column name="times_requested" id="8D643548-93DD-FDC0-241F-B1E2D08A20D4">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>41476BC0-DA37-E595-3F64-45358C275271</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT011</logicalDatatype>
+<ownDataTypeParameters>,,</ownDataTypeParameters>
+<autoIncrementCycle>false</autoIncrementCycle>
+</Column>
+</columns>
+<indexes itemClass="oracle.dbtools.crest.model.design.relational.Index">
+<ind_PK_UK id="0AAA742E-85E9-ABBB-3457-D0D166522D31" name="Playlist_PK">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>E3C428C4-0B62-6F66-F2BC-DB1AEE9F9400</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<pk>true</pk>
+<indexState>Primary Constraint</indexState>
+<isSurrogateKey>false</isSurrogateKey>
+<indexColumnUsage>
+<colUsage columnID="9961C1BD-DFE5-9B3E-1C5F-5FEAC633680C"/>
+</indexColumnUsage>
+</ind_PK_UK>
+</indexes>
+</Table>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/table/seg_0/175D64CD-6D93-E0AE-DD13-FF75CAB2DC92.xml b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/table/seg_0/175D64CD-6D93-E0AE-DD13-FF75CAB2DC92.xml
new file mode 100644
index 0000000..40a1315
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/table/seg_0/175D64CD-6D93-E0AE-DD13-FF75CAB2DC92.xml
@@ -0,0 +1,62 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<Table class="oracle.dbtools.crest.model.design.relational.Table" directorySegmentName="seg_0" id="175D64CD-6D93-E0AE-DD13-FF75CAB2DC92" name="User">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>96125017-F1D2-153D-CBAC-D12E0939CF4E</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<allowColumnReorder>false</allowColumnReorder>
+<existDependencyGenerateInDDl>true</existDependencyGenerateInDDl>
+<parsed>true</parsed>
+<columns itemClass="oracle.dbtools.crest.model.design.relational.Column">
+<Column name="user_id" id="7794EE2F-2CCF-4261-4CE3-DF17DC38EB8E">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>8775EFB1-2319-5282-E470-92105C133D68</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT011</logicalDatatype>
+<ownDataTypeParameters>,,</ownDataTypeParameters>
+<autoIncrementCycle>false</autoIncrementCycle>
+</Column>
+<Column name="username" id="05A6D064-A844-05CE-EA54-9F505F814098">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>DD1E5201-1D06-B0BD-F764-99D672888063</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT024</logicalDatatype>
+<dataTypeSize>45 CHAR</dataTypeSize>
+<ownDataTypeParameters>45 CHAR,,</ownDataTypeParameters>
+<autoIncrementCycle>false</autoIncrementCycle>
+</Column>
+<Column name="name" id="BADE10A9-0873-F33A-619F-E59863AAF4E8">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>E8A2F3A1-63F6-7D92-7D9A-B9668238C030</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT040</logicalDatatype>
+<ownDataTypeParameters>,,</ownDataTypeParameters>
+<autoIncrementCycle>false</autoIncrementCycle>
+</Column>
+</columns>
+<indexes itemClass="oracle.dbtools.crest.model.design.relational.Index">
+<ind_PK_UK id="D02538CD-C7A9-1C9E-7706-9BD9CDCB8B5D" name="User_PK">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>3E09607E-650C-5E05-C7AC-0E839F482CA2</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<pk>true</pk>
+<indexState>Primary Constraint</indexState>
+<isSurrogateKey>false</isSurrogateKey>
+<indexColumnUsage>
+<colUsage columnID="7794EE2F-2CCF-4261-4CE3-DF17DC38EB8E"/>
+</indexColumnUsage>
+</ind_PK_UK>
+</indexes>
+</Table>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/table/seg_0/25DE0936-5106-79A2-1678-9EAA1E0DA843.xml b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/table/seg_0/25DE0936-5106-79A2-1678-9EAA1E0DA843.xml
new file mode 100644
index 0000000..b47beed
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/table/seg_0/25DE0936-5106-79A2-1678-9EAA1E0DA843.xml
@@ -0,0 +1,100 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<Table class="oracle.dbtools.crest.model.design.relational.Table" directorySegmentName="seg_0" id="25DE0936-5106-79A2-1678-9EAA1E0DA843" name="Music">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>FB782D70-50E0-0A98-4654-5E94050F8458</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<allowColumnReorder>false</allowColumnReorder>
+<existDependencyGenerateInDDl>true</existDependencyGenerateInDDl>
+<parsed>true</parsed>
+<columns itemClass="oracle.dbtools.crest.model.design.relational.Column">
+<Column name="file_id" id="1F1E7DDA-F1AD-9264-27B3-CC9CC8B4A8FB">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>CAFF56A3-E241-F64F-19BE-CEA2E258C602</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT024</logicalDatatype>
+<dataTypeSize>256 CHAR</dataTypeSize>
+<ownDataTypeParameters>256 CHAR,,</ownDataTypeParameters>
+<autoIncrementCycle>false</autoIncrementCycle>
+</Column>
+<Column name="video_id" id="B2272C58-988F-9FD9-CD26-C89F6F6E72A5">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>F8C2F601-3EC1-B326-E4FF-67F526339C68</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT024</logicalDatatype>
+<dataTypeSize>20 CHAR</dataTypeSize>
+<ownDataTypeParameters>20 CHAR,,</ownDataTypeParameters>
+<autoIncrementCycle>false</autoIncrementCycle>
+</Column>
+<Column name="audio_quality" id="1A16F378-0DFC-2403-B78D-6E480A73D80F">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>B61AEEA2-7623-7334-D69C-F52A0DCF68A1</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT011</logicalDatatype>
+<ownDataTypeParameters>,,</ownDataTypeParameters>
+<autoIncrementCycle>false</autoIncrementCycle>
+</Column>
+<Column name="audio_format" id="CC8C045A-384B-03FC-28A5-2BD3B4510BD6">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>5AEEEE54-E69D-8679-E7E7-646D336C8773</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT011</logicalDatatype>
+<ownDataTypeParameters>,,</ownDataTypeParameters>
+<autoIncrementCycle>false</autoIncrementCycle>
+</Column>
+<Column name="times_requested" id="1B8B92C7-16C5-D32F-C04B-852EBEE2F1C4">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>571F95C4-86B3-8290-242D-003807560AFA</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT011</logicalDatatype>
+<ownDataTypeParameters>,,</ownDataTypeParameters>
+<autoIncrementCycle>false</autoIncrementCycle>
+</Column>
+<Column name="is_metadata_by_user" id="C3FBA2D2-F257-F159-AFD9-1E5273DF1069">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>1017AB39-0480-C236-5621-1E00FD454B4C</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT006</logicalDatatype>
+<dataTypeSize>1 BYTE</dataTypeSize>
+<ownDataTypeParameters>1 BYTE,,</ownDataTypeParameters>
+<autoIncrementCycle>false</autoIncrementCycle>
+</Column>
+</columns>
+<indexes itemClass="oracle.dbtools.crest.model.design.relational.Index">
+<ind_PK_UK id="5EE86BBE-3C43-6A0D-DECB-B287A7214DD4" name="Music_PK">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>2F9B98EF-2E48-6530-04A0-1E62A0B7E323</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<pk>true</pk>
+<indexState>Primary Constraint</indexState>
+<isSurrogateKey>false</isSurrogateKey>
+<indexColumnUsage>
+<colUsage columnID="1F1E7DDA-F1AD-9264-27B3-CC9CC8B4A8FB"/>
+</indexColumnUsage>
+</ind_PK_UK>
+</indexes>
+</Table>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/table/seg_0/47A181FD-9D20-6987-2EAE-0B7F53C88FB3.xml b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/table/seg_0/47A181FD-9D20-6987-2EAE-0B7F53C88FB3.xml
new file mode 100644
index 0000000..7d6b4d0
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/table/seg_0/47A181FD-9D20-6987-2EAE-0B7F53C88FB3.xml
@@ -0,0 +1,77 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<Table class="oracle.dbtools.crest.model.design.relational.Table" directorySegmentName="seg_0" id="47A181FD-9D20-6987-2EAE-0B7F53C88FB3" name="Playlist_has_Music">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<allowColumnReorder>false</allowColumnReorder>
+<existDependencyGenerateInDDl>true</existDependencyGenerateInDDl>
+<parsed>true</parsed>
+<columns itemClass="oracle.dbtools.crest.model.design.relational.Column">
+<Column name="Playlist_playlist_id" id="F4245181-B774-E93A-39C8-0A248335545E">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT024</logicalDatatype>
+<dataTypeSize>256 CHAR</dataTypeSize>
+<ownDataTypeParameters>,,</ownDataTypeParameters>
+<previousColumn>false</previousColumn>
+<autoIncrementCycle>false</autoIncrementCycle>
+<associations>
+<colAssociation fkAssociation="518E00B2-30C8-083A-0841-D61034BE188E" referredColumn="9961C1BD-DFE5-9B3E-1C5F-5FEAC633680C"/>
+</associations>
+</Column>
+<Column name="Music_file_id" id="3132AE0E-35F7-D5FB-7991-D900AE22AD43">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT024</logicalDatatype>
+<dataTypeSize>256 CHAR</dataTypeSize>
+<ownDataTypeParameters>,,</ownDataTypeParameters>
+<previousColumn>false</previousColumn>
+<autoIncrementCycle>false</autoIncrementCycle>
+<associations>
+<colAssociation fkAssociation="B59DC6EC-C75B-86D4-AFA3-705630B49873" referredColumn="1F1E7DDA-F1AD-9264-27B3-CC9CC8B4A8FB"/>
+</associations>
+</Column>
+</columns>
+<indexes itemClass="oracle.dbtools.crest.model.design.relational.Index">
+<ind_PK_UK id="26077F0B-DF80-4C22-9679-E91111201BFD" name="Playlist_has_Music_PK">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<pk>true</pk>
+<indexState>Primary Constraint</indexState>
+<isSurrogateKey>false</isSurrogateKey>
+<indexColumnUsage>
+<colUsage columnID="F4245181-B774-E93A-39C8-0A248335545E"/>
+<colUsage columnID="3132AE0E-35F7-D5FB-7991-D900AE22AD43"/>
+</indexColumnUsage>
+</ind_PK_UK>
+<ind_PK_UK id="2E42E7DB-DC1C-B6A6-1678-89DFBEE716F9" name="Playlist_has_Music_Playlist_FK">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>1D1B52B1-8974-5046-5AB7-7AB4BF89C08A</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<indexState>Foreign Key</indexState>
+<isSurrogateKey>false</isSurrogateKey>
+<indexColumnUsage>
+<colUsage columnID="F4245181-B774-E93A-39C8-0A248335545E"/>
+</indexColumnUsage>
+</ind_PK_UK>
+<ind_PK_UK id="40965CD0-1F34-A725-D6F7-9DE5157A00AD" name="Playlist_has_Music_Music_FK">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>1D1B52B1-8974-5046-5AB7-7AB4BF89C08A</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<indexState>Foreign Key</indexState>
+<isSurrogateKey>false</isSurrogateKey>
+<indexColumnUsage>
+<colUsage columnID="3132AE0E-35F7-D5FB-7991-D900AE22AD43"/>
+</indexColumnUsage>
+</ind_PK_UK>
+</indexes>
+</Table>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/table/seg_0/D088A558-CA22-9A96-F938-4F7712E4AEF1.xml b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/table/seg_0/D088A558-CA22-9A96-F938-4F7712E4AEF1.xml
new file mode 100644
index 0000000..55fbaaa
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/table/seg_0/D088A558-CA22-9A96-F938-4F7712E4AEF1.xml
@@ -0,0 +1,103 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<Table class="oracle.dbtools.crest.model.design.relational.Table" directorySegmentName="seg_0" id="D088A558-CA22-9A96-F938-4F7712E4AEF1" name="Preferences">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>312E0255-FAA7-1630-54E5-A4FCB50F6276</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<allowColumnReorder>false</allowColumnReorder>
+<existDependencyGenerateInDDl>true</existDependencyGenerateInDDl>
+<parsed>true</parsed>
+<columns itemClass="oracle.dbtools.crest.model.design.relational.Column">
+<Column name="audio_quality" id="F6A481E9-1265-91A9-3936-E8A79D924643">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>2DFD054F-D34B-E405-1BE4-892DD74BA271</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT024</logicalDatatype>
+<dataTypeSize>5 CHAR</dataTypeSize>
+<ownDataTypeParameters>5 CHAR,,</ownDataTypeParameters>
+<autoIncrementCycle>false</autoIncrementCycle>
+</Column>
+<Column name="audio_format" id="4A4788CA-F09C-13DB-16BE-E381506ACD66">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>DA295574-77E1-2B18-8034-394D422AFB44</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT024</logicalDatatype>
+<dataTypeSize>5 CHAR</dataTypeSize>
+<ownDataTypeParameters>5 CHAR,,</ownDataTypeParameters>
+<autoIncrementCycle>false</autoIncrementCycle>
+</Column>
+<Column name="os" id="559E1A0B-1DD2-CE99-49E2-03F5504E9CB2">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>6A072B91-6717-56AE-E792-D79219943063</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT024</logicalDatatype>
+<dataTypeSize>10 CHAR</dataTypeSize>
+<ownDataTypeParameters>10 CHAR,,</ownDataTypeParameters>
+<autoIncrementCycle>false</autoIncrementCycle>
+</Column>
+<Column name="should_ask_metadata" id="6359C17F-BB55-BF0A-2119-A210438C83E2">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>861DF039-AE33-7187-ED33-DE8065B1D145</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT006</logicalDatatype>
+<dataTypeSize>1 BYTE</dataTypeSize>
+<ownDataTypeParameters>1 BYTE,,</ownDataTypeParameters>
+<autoIncrementCycle>false</autoIncrementCycle>
+</Column>
+<Column name="User_user_id" id="ED4B8B19-788A-C6AB-2B29-E06AA357326F">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>41D91414-1277-D3D5-F7EF-FBB7131C89A4</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT011</logicalDatatype>
+<ownDataTypeParameters>,,</ownDataTypeParameters>
+<previousColumn>false</previousColumn>
+<autoIncrementCycle>false</autoIncrementCycle>
+<associations>
+<colAssociation fkAssociation="C7DC4550-6D2C-B38B-5C23-5E37D6D8832D" referredColumn="7794EE2F-2CCF-4261-4CE3-DF17DC38EB8E"/>
+</associations>
+</Column>
+</columns>
+<indexes itemClass="oracle.dbtools.crest.model.design.relational.Index">
+<ind_PK_UK id="D45887E7-B0C8-4329-CD2C-2339022EA6B9" name="Preferences__IDX">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<indexState>Unique Plain Index</indexState>
+<isSurrogateKey>false</isSurrogateKey>
+<relationGeneratorID>C49FD692-24A0-3030-2280-A4D5B8CDFC01</relationGeneratorID>
+<indexColumnUsage>
+<colUsage columnID="ED4B8B19-788A-C6AB-2B29-E06AA357326F"/>
+</indexColumnUsage>
+</ind_PK_UK>
+<ind_PK_UK id="83FE0090-5C03-399C-F8A0-507E18B766B4" name="Preferences_User_FK">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>C49FD692-24A0-3030-2280-A4D5B8CDFC01</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<indexState>Foreign Key</indexState>
+<isSurrogateKey>false</isSurrogateKey>
+<indexColumnUsage>
+<colUsage columnID="ED4B8B19-788A-C6AB-2B29-E06AA357326F"/>
+</indexColumnUsage>
+</ind_PK_UK>
+</indexes>
+</Table>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/table/seg_0/D1128F38-5763-FC3D-4FB1-14F78EDBE4CB.xml b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/table/seg_0/D1128F38-5763-FC3D-4FB1-14F78EDBE4CB.xml
new file mode 100644
index 0000000..a07d74f
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/table/seg_0/D1128F38-5763-FC3D-4FB1-14F78EDBE4CB.xml
@@ -0,0 +1,103 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<Table class="oracle.dbtools.crest.model.design.relational.Table" directorySegmentName="seg_0" id="D1128F38-5763-FC3D-4FB1-14F78EDBE4CB" name="Metadata">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>1558C95F-4CEC-1E30-AA15-58B7C6ACD81B</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<allowColumnReorder>false</allowColumnReorder>
+<existDependencyGenerateInDDl>true</existDependencyGenerateInDDl>
+<parsed>true</parsed>
+<columns itemClass="oracle.dbtools.crest.model.design.relational.Column">
+<Column name="title" id="87951F1E-A09B-F590-3B22-3B5736A6001B">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>49089203-E88B-9C71-4BAB-AA5574F6A82F</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT024</logicalDatatype>
+<dataTypeSize>256 CHAR</dataTypeSize>
+<ownDataTypeParameters>256 CHAR,,</ownDataTypeParameters>
+<autoIncrementCycle>false</autoIncrementCycle>
+</Column>
+<Column name="artist" id="56FC47A3-F574-6AD0-F406-E9B1D45E394F">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>312A4237-841B-F0D6-219B-47FD4C4AA4AD</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT024</logicalDatatype>
+<dataTypeSize>256 CHAR</dataTypeSize>
+<ownDataTypeParameters>256 CHAR,,</ownDataTypeParameters>
+<autoIncrementCycle>false</autoIncrementCycle>
+</Column>
+<Column name="cover" id="0C29B2E8-7158-1578-5C91-ADE19E2390B7">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>74912055-663D-B1D1-BE49-9179459CBBCB</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT040</logicalDatatype>
+<ownDataTypeParameters>,,</ownDataTypeParameters>
+<autoIncrementCycle>false</autoIncrementCycle>
+</Column>
+<Column name="duration" id="D23F98D6-4E09-B8AD-4C7F-42EC7A930AA1">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>1E9D1478-D7E1-147D-DAFA-C42220EE51DC</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<nullsAllowed>true</nullsAllowed>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT024</logicalDatatype>
+<dataTypeSize>20 CHAR</dataTypeSize>
+<ownDataTypeParameters>20 CHAR,,</ownDataTypeParameters>
+<autoIncrementCycle>false</autoIncrementCycle>
+</Column>
+<Column name="Music_file_id" id="4E2D5316-C5B0-94A6-D60F-39DC22832571">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>BA20C781-6605-F30A-9E03-F6286452BDDC</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT024</logicalDatatype>
+<dataTypeSize>256 CHAR</dataTypeSize>
+<ownDataTypeParameters>,,</ownDataTypeParameters>
+<previousColumn>false</previousColumn>
+<autoIncrementCycle>false</autoIncrementCycle>
+<associations>
+<colAssociation fkAssociation="6A45C1C6-8C3B-317C-9221-BA841A05B730" referredColumn="1F1E7DDA-F1AD-9264-27B3-CC9CC8B4A8FB"/>
+</associations>
+</Column>
+</columns>
+<indexes itemClass="oracle.dbtools.crest.model.design.relational.Index">
+<ind_PK_UK id="0F87D407-9597-A480-0EE4-7B985D153114" name="Metadata__IDX">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<indexState>Unique Plain Index</indexState>
+<isSurrogateKey>false</isSurrogateKey>
+<relationGeneratorID>46906DFA-66DD-2DD5-790C-7A87FFE7755C</relationGeneratorID>
+<indexColumnUsage>
+<colUsage columnID="4E2D5316-C5B0-94A6-D60F-39DC22832571"/>
+</indexColumnUsage>
+</ind_PK_UK>
+<ind_PK_UK id="A0664BE3-7AF8-ED5A-E836-901C1922B6FB" name="Metadata_Music_FK">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:51:13 UTC</createdTime>
+<generatorID>46906DFA-66DD-2DD5-790C-7A87FFE7755C</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<indexState>Foreign Key</indexState>
+<isSurrogateKey>false</isSurrogateKey>
+<indexColumnUsage>
+<colUsage columnID="4E2D5316-C5B0-94A6-D60F-39DC22832571"/>
+</indexColumnUsage>
+</ind_PK_UK>
+</indexes>
+</Table>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/table/seg_0/F0AD5A40-5659-C806-BEA1-595FD0DB5F39.xml b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/table/seg_0/F0AD5A40-5659-C806-BEA1-595FD0DB5F39.xml
new file mode 100644
index 0000000..6208457
--- /dev/null
+++ b/Design/DB_STRUCTURE/database_design/rel/C5DFC5DD-B7648E7DE99B/table/seg_0/F0AD5A40-5659-C806-BEA1-595FD0DB5F39.xml
@@ -0,0 +1,76 @@
+<?xml version = '1.0' encoding = 'UTF-8'?>
+<Table class="oracle.dbtools.crest.model.design.relational.Table" directorySegmentName="seg_0" id="F0AD5A40-5659-C806-BEA1-595FD0DB5F39" name="History">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:53:19 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<allowColumnReorder>false</allowColumnReorder>
+<existDependencyGenerateInDDl>true</existDependencyGenerateInDDl>
+<parsed>true</parsed>
+<columns itemClass="oracle.dbtools.crest.model.design.relational.Column">
+<Column name="User_user_id" id="6D5B6125-966E-B23F-72CC-DA0BDFA0336F">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:53:19 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT011</logicalDatatype>
+<ownDataTypeParameters>,,</ownDataTypeParameters>
+<previousColumn>false</previousColumn>
+<autoIncrementCycle>false</autoIncrementCycle>
+<associations>
+<colAssociation fkAssociation="6AA622A5-D308-C63C-2AF6-730CF06EBF34" referredColumn="7794EE2F-2CCF-4261-4CE3-DF17DC38EB8E"/>
+</associations>
+</Column>
+<Column name="Music_file_id" id="82E0414D-6D05-78CB-67DE-A112D001ED33">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:53:19 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<useDomainConstraints>false</useDomainConstraints>
+<use>1</use>
+<logicalDatatype>LOGDT024</logicalDatatype>
+<dataTypeSize>256 CHAR</dataTypeSize>
+<ownDataTypeParameters>,,</ownDataTypeParameters>
+<previousColumn>false</previousColumn>
+<autoIncrementCycle>false</autoIncrementCycle>
+<associations>
+<colAssociation fkAssociation="14761BF2-0284-F09E-1C36-5AD59C18B84E" referredColumn="1F1E7DDA-F1AD-9264-27B3-CC9CC8B4A8FB"/>
+</associations>
+</Column>
+</columns>
+<indexes itemClass="oracle.dbtools.crest.model.design.relational.Index">
+<ind_PK_UK id="367D70B2-2ECE-7917-5A09-60611F717824" name="History_PK">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:53:19 UTC</createdTime>
+<ownerDesignName>database_design</ownerDesignName>
+<pk>true</pk>
+<indexState>Primary Constraint</indexState>
+<isSurrogateKey>false</isSurrogateKey>
+<indexColumnUsage>
+<colUsage columnID="6D5B6125-966E-B23F-72CC-DA0BDFA0336F"/>
+<colUsage columnID="82E0414D-6D05-78CB-67DE-A112D001ED33"/>
+</indexColumnUsage>
+</ind_PK_UK>
+<ind_PK_UK id="7854E7A3-36BD-5278-CD52-59B6D1C94E9E" name="History_User_FK">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:53:19 UTC</createdTime>
+<generatorID>DDBAFE8B-B820-1773-EE96-8B363262CAA9</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<indexState>Foreign Key</indexState>
+<isSurrogateKey>false</isSurrogateKey>
+<indexColumnUsage>
+<colUsage columnID="6D5B6125-966E-B23F-72CC-DA0BDFA0336F"/>
+</indexColumnUsage>
+</ind_PK_UK>
+<ind_PK_UK id="F4787963-BEB2-ACB7-3BF2-7B6E392B75DE" name="History_Music_FK">
+<createdBy>Javier Alonso Silva</createdBy>
+<createdTime>2018-06-18 14:53:19 UTC</createdTime>
+<generatorID>DDBAFE8B-B820-1773-EE96-8B363262CAA9</generatorID>
+<ownerDesignName>database_design</ownerDesignName>
+<indexState>Foreign Key</indexState>
+<isSurrogateKey>false</isSurrogateKey>
+<indexColumnUsage>
+<colUsage columnID="82E0414D-6D05-78CB-67DE-A112D001ED33"/>
+</indexColumnUsage>
+</ind_PK_UK>
+</indexes>
+</Table>
\ No newline at end of file
diff --git a/Design/DB_STRUCTURE/db_script.ddl b/Design/DB_STRUCTURE/db_script.ddl
new file mode 100644
index 0000000..a2c2827
--- /dev/null
+++ b/Design/DB_STRUCTURE/db_script.ddl
@@ -0,0 +1,147 @@
+-- Generado por Oracle SQL Developer Data Modeler 18.1.0.082.1035
+--   en:        2018-06-18 16:59:15 CEST
+--   sitio:      Oracle Database 11g
+--   tipo:      Oracle Database 11g
+
+
+
+CREATE TABLE history (
+    user_user_id    INTEGER NOT NULL,
+    music_file_id   VARCHAR2(256 CHAR) NOT NULL
+);
+
+ALTER TABLE history ADD CONSTRAINT history_pk PRIMARY KEY ( user_user_id,
+                                                            music_file_id );
+
+CREATE TABLE metadata (
+    title           VARCHAR2(256 CHAR),
+    artist          VARCHAR2(256 CHAR),
+    cover           CLOB,
+    duration        VARCHAR2(20 CHAR),
+    music_file_id   VARCHAR2(256 CHAR) NOT NULL
+);
+
+CREATE UNIQUE INDEX metadata__idx ON
+    metadata (
+        music_file_id
+    ASC );
+
+CREATE TABLE music (
+    file_id               VARCHAR2(256 CHAR) NOT NULL,
+    video_id              VARCHAR2(20 CHAR),
+    audio_quality         INTEGER,
+    audio_format          INTEGER,
+    times_requested       INTEGER,
+    is_metadata_by_user   CHAR(1)
+);
+
+ALTER TABLE music ADD CONSTRAINT music_pk PRIMARY KEY ( file_id );
+
+CREATE TABLE playlist (
+    playlist_id       VARCHAR2(256 CHAR) NOT NULL,
+    number_elements   INTEGER,
+    times_requested   INTEGER
+);
+
+ALTER TABLE playlist ADD CONSTRAINT playlist_pk PRIMARY KEY ( playlist_id );
+
+CREATE TABLE playlist_has_music (
+    playlist_playlist_id   VARCHAR2(256 CHAR) NOT NULL,
+    music_file_id          VARCHAR2(256 CHAR) NOT NULL
+);
+
+ALTER TABLE playlist_has_music ADD CONSTRAINT playlist_has_music_pk PRIMARY KEY ( playlist_playlist_id,
+                                                                                  music_file_id );
+
+CREATE TABLE preferences (
+    audio_quality         VARCHAR2(5 CHAR),
+    audio_format          VARCHAR2(5 CHAR),
+    os                    VARCHAR2(10 CHAR),
+    should_ask_metadata   CHAR(1),
+    user_user_id          INTEGER NOT NULL
+);
+
+CREATE UNIQUE INDEX preferences__idx ON
+    preferences (
+        user_user_id
+    ASC );
+
+CREATE TABLE "User" (
+    user_id    INTEGER NOT NULL,
+    username   VARCHAR2(45 CHAR),
+    name       CLOB
+);
+
+ALTER TABLE "User" ADD CONSTRAINT user_pk PRIMARY KEY ( user_id );
+
+ALTER TABLE history
+    ADD CONSTRAINT history_music_fk FOREIGN KEY ( music_file_id )
+        REFERENCES music ( file_id )
+            ON DELETE CASCADE;
+
+ALTER TABLE history
+    ADD CONSTRAINT history_user_fk FOREIGN KEY ( user_user_id )
+        REFERENCES "User" ( user_id )
+            ON DELETE CASCADE;
+
+ALTER TABLE metadata
+    ADD CONSTRAINT metadata_music_fk FOREIGN KEY ( music_file_id )
+        REFERENCES music ( file_id )
+            ON DELETE CASCADE;
+
+ALTER TABLE playlist_has_music
+    ADD CONSTRAINT playlist_has_music_music_fk FOREIGN KEY ( music_file_id )
+        REFERENCES music ( file_id );
+
+ALTER TABLE playlist_has_music
+    ADD CONSTRAINT playlist_has_music_playlist_fk FOREIGN KEY ( playlist_playlist_id )
+        REFERENCES playlist ( playlist_id );
+
+ALTER TABLE preferences
+    ADD CONSTRAINT preferences_user_fk FOREIGN KEY ( user_user_id )
+        REFERENCES "User" ( user_id )
+            ON DELETE CASCADE;
+
+
+
+-- Informe de Resumen de Oracle SQL Developer Data Modeler: 
+-- 
+-- CREATE TABLE                             7
+-- CREATE INDEX                             2
+-- ALTER TABLE                             11
+-- CREATE VIEW                              0
+-- ALTER VIEW                               0
+-- CREATE PACKAGE                           0
+-- CREATE PACKAGE BODY                      0
+-- CREATE PROCEDURE                         0
+-- CREATE FUNCTION                          0
+-- CREATE TRIGGER                           0
+-- ALTER TRIGGER                            0
+-- CREATE COLLECTION TYPE                   0
+-- CREATE STRUCTURED TYPE                   0
+-- CREATE STRUCTURED TYPE BODY              0
+-- CREATE CLUSTER                           0
+-- CREATE CONTEXT                           0
+-- CREATE DATABASE                          0
+-- CREATE DIMENSION                         0
+-- CREATE DIRECTORY                         0
+-- CREATE DISK GROUP                        0
+-- CREATE ROLE                              0
+-- CREATE ROLLBACK SEGMENT                  0
+-- CREATE SEQUENCE                          0
+-- CREATE MATERIALIZED VIEW                 0
+-- CREATE SYNONYM                           0
+-- CREATE TABLESPACE                        0
+-- CREATE USER                              0
+-- 
+-- DROP TABLESPACE                          0
+-- DROP DATABASE                            0
+-- 
+-- REDACTION POLICY                         0
+-- 
+-- ORDS DROP SCHEMA                         0
+-- ORDS ENABLE SCHEMA                       0
+-- ORDS ENABLE OBJECT                       0
+-- 
+-- ERRORS                                   0
+-- WARNINGS                                 0