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<p align="right">4/1/2008</p>
<h3 align="center">UMLS<sup>®</sup> KNOWLEDGE SOURCES</h3>
<p align="center"><strong>April Release<br />2008AA<br />DOCUMENTATION</strong></p><!-- for section 0 and 1, file name is UMLSDOC.HTML -->
<dl>
<dt><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/umlsdoc_preface.html#s0_0">Section
0: Preface</a>
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/umlsdoc_preface.html#s0_1">0.1</a>&nbsp;&nbsp;&nbsp;&nbsp;
Purpose of This Documentation
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/umlsdoc_preface.html#s0_2">0.2</a>&nbsp;&nbsp;&nbsp;&nbsp;
Release Schedule
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/umlsdoc_preface.html#s0_3">0.3</a>&nbsp;&nbsp;&nbsp;&nbsp;
Audience
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/umlsdoc_preface.html#s0_4">0.4</a>&nbsp;&nbsp;&nbsp;&nbsp;
How to Use This Documentation
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/umlsdoc_preface.html#s0_5">0.5</a>&nbsp;&nbsp;&nbsp;&nbsp;
What's New for This Version of the UMLS<br /><br /><!-- use this for anchor <a name="s1_0" id="s1_0"> -->
<dt><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/umlsdoc_intro.html#s1_0">Section 1:
Introduction to the UMLS</a>
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/umlsdoc_intro.html#s1_1">1.1</a>&nbsp;&nbsp;&nbsp;&nbsp;
Purpose of the UMLS
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/umlsdoc_intro.html#s1_2">1.2</a>&nbsp;&nbsp;&nbsp;&nbsp;
Conditions of Use of the UMLS
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/umlsdoc_intro.html#s1_3">1.3</a>&nbsp;&nbsp;&nbsp;&nbsp;
Brief Description of the UMLS Knowledge Sources and Associated Tools
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/umlsdoc_intro.html#s1_4">1.4</a>&nbsp;&nbsp;&nbsp;&nbsp;
Getting Started
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/umlsdoc_intro.html#s1_5">1.5</a>&nbsp;&nbsp;&nbsp;&nbsp;
Sources of Additional Information about the UMLS<br /><br /><!-- use this for anchor <a name="s2_0" id="s2_0"> -->
<dt><a href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta2.html#s2_0">Section 2:
Metathesaurus</a>
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta2.html#s2_0">2.0</a>&nbsp;&nbsp;&nbsp;&nbsp;
Introduction
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta2.html#s2_1">2.1</a>&nbsp;&nbsp;&nbsp;&nbsp;
Source Vocabularies
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta2.html#s2_2">2.2</a>&nbsp;&nbsp;&nbsp;&nbsp;
Concepts, Concept Names, and Their Identifiers
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta2.html#s2_3">2.3</a>&nbsp;&nbsp;&nbsp;&nbsp;
Relationships and Relationship Identifiers
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta2.html#s2_4">2.4</a>&nbsp;&nbsp;&nbsp;&nbsp;
Attributes and Attribute Identifiers
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta2.html#s2_5">2.5</a>&nbsp;&nbsp;&nbsp;&nbsp;
Data About the Metathesaurus
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta2.html#s2_6">2.6</a>&nbsp;&nbsp;&nbsp;&nbsp;
Concept Name Indexes
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta2.html#s2_7">2.7</a>&nbsp;&nbsp;&nbsp;&nbsp;
File Formats - Metathesaurus Rich Release Format (RRF) and Original Release
Format (ORF)
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta2.html#s2_8">2.8</a>&nbsp;&nbsp;&nbsp;&nbsp;
Character Sets<br /><br /><!-- use this for anchor <a name="s3_0" id="s3_0"> -->
<dt><a href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta3.html#s3_0">Section 3:
Semantic Network</a>
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta3.html#s3_0">3.0</a>&nbsp;&nbsp;&nbsp;&nbsp;
Introduction
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta3.html#s3_1">3.1</a>&nbsp;&nbsp;&nbsp;&nbsp;
Overview
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta3.html#s3_2">3.2</a>&nbsp;&nbsp;&nbsp;&nbsp;
Semantic Network ASCII Relational Format
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta3.html#s3_3">3.3</a>&nbsp;&nbsp;&nbsp;&nbsp;
Semantic Network ASCII Unit Record Format
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta3.html#s3_4">3.4</a>&nbsp;&nbsp;&nbsp;&nbsp;
Hierarchies for Semantic Types and Relations in the Semantic Network<br /><br /><!-- use this for anchor <a name="s4_0" id="s4_0"> -->
<dt><a href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta4.html#s4_0">Section 4:
SPECIALIST Lexicon and Lexical Tools</a>
<dd><br /><!-- use this for anchor <a name="s5_0" id="s5_0"> -->
<dt><a href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta5.html#s5_0">Section 5:
Using the UMLS Knowledge Source Server (UMLSKS) via the Internet </a>
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta5.html#s5_0">5.0</a>&nbsp;&nbsp;&nbsp;&nbsp;
Background
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta5.html#s5_1">5.1</a>&nbsp;&nbsp;&nbsp;&nbsp;
Downloading UMLS Knowledge Sources
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta5.html#s5_2">5.2</a>&nbsp;&nbsp;&nbsp;&nbsp;
System Architecture
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta5.html#s5_3">5.3</a>&nbsp;&nbsp;&nbsp;&nbsp;
Querying the UMLSKS
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta5.html#s5_4">5.4</a>&nbsp;&nbsp;&nbsp;&nbsp;
Gaining Access to the UMLSKS
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta5.html#s5_5">5.5</a>&nbsp;&nbsp;&nbsp;&nbsp;
UMLSKS Documentation<br /><br /><!-- use this for anchor <a name="s6_0" id="s6_0"> -->
<dt><a href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta6.html#s6_0">Section 6:
MetamorphoSys - the UMLS Installation and Customization Program</a>
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta6.html#s6_0">6.0</a>&nbsp;&nbsp;&nbsp;&nbsp;
Introduction
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta6.html#s6_1">6.1</a>&nbsp;&nbsp;&nbsp;&nbsp;
MetamorphoSys Requirements
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta6.html#s6_2">6.2</a>&nbsp;&nbsp;&nbsp;&nbsp;
Starting MetamorphoSys
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta6.html#s6_3">6.3</a>&nbsp;&nbsp;&nbsp;&nbsp;
Using MetamorphoSys
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta6.html#s6_4">6.4</a>&nbsp;&nbsp;&nbsp;&nbsp;
Select Default Subset
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta6.html#s6_5">6.5</a>&nbsp;&nbsp;&nbsp;&nbsp;
Option Tabs
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta6.html#s6_6">6.6</a>&nbsp;&nbsp;&nbsp;&nbsp;
File Menu
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta6.html#s6_7">6.7</a>&nbsp;&nbsp;&nbsp;&nbsp;
Edit Menu
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta6.html#s6_8">6.8</a>&nbsp;&nbsp;&nbsp;&nbsp;
Options (for Advanced Users)
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta6.html#s6_9">6.9</a>&nbsp;&nbsp;&nbsp;&nbsp;
Reset Menu
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta6.html#s6_10">6.10</a>&nbsp;&nbsp;&nbsp;
Done; Begin Subset
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta6.html#s6_11">6.11</a>&nbsp;&nbsp;&nbsp;
RRF Browser
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta6.html#s6_12">6.12</a>&nbsp;&nbsp;&nbsp;
MRCXT Builder
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta6.html#s6_13">6.13</a>&nbsp;&nbsp;&nbsp;
API Documentation
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta6.html#s6_14">6.14</a>&nbsp;&nbsp;&nbsp;
Getting Help
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta6.html#s6_14">6.15</a>&nbsp;&nbsp;&nbsp;
Acknowledgments<br /><br /><!-- use this for anchor <a name="s7_0" id="s7_0"> -->
<dt><a href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta7.html#s7_0">Section 7:
UMLS DVD</a>
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta7.html#s7_0">7.0</a>&nbsp;&nbsp;&nbsp;&nbsp;
Introduction
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta7.html#s7_1">7.1</a>&nbsp;&nbsp;&nbsp;&nbsp;
Hardware and Software Requirements
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/meta7.html#s7_2">7.2</a>&nbsp;&nbsp;&nbsp;&nbsp;
Installing from the DVD<br /><br /><!-- use this for anchor <a name="sa_0" id="sa_0"> -->
<dt><a href="http://www.nlm.nih.gov/archive/20081104/research/umls/metaa.html#sa_0">Appendix A.
License for Use of the UMLS Metathesaurus</a>
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/metaa1.html">A.1</a>&nbsp;&nbsp;&nbsp;&nbsp;
Appendix to the License Agreement for Use of the UMLS Metathesaurus
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/metaa2.html">A.2</a>&nbsp;&nbsp;&nbsp;&nbsp;
SNOMED CT® Affiliate Licence Agreement<br /><br /><!-- use this for anchor <a name="sb_0" id="sb_0"> -->
<dt><a href="http://www.nlm.nih.gov/archive/20081104/research/umls/metab.html#sb_0">Appendix B.
Metathesaurus Metadata</a>
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/metab.html#sb_1">B.1</a>&nbsp;&nbsp;&nbsp;&nbsp;
Columns and Data Elements
<dd>&nbsp;&nbsp;&nbsp;&nbsp;<a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/metab.html#sb_1.1">B.1.1</a>&nbsp;&nbsp;
Columns and Data Elements in Rich Release Format (RRF)
<dd>&nbsp;&nbsp;&nbsp;&nbsp;<a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/metab.html#sb_1.2">B.1.2</a>&nbsp;&nbsp;
Columns and Data Elements in Original Release Format (ORF)
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/metab2.html#sb2_0">B.2</a>&nbsp;&nbsp;&nbsp;&nbsp;
Attribute Names
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/metab3.html#sb3_0">B.3</a>&nbsp;&nbsp;&nbsp;&nbsp;
Abbreviations Used in Data Elements
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/metab4.html#sb4_0">B.4</a>&nbsp;&nbsp;&nbsp;&nbsp;
Source Vocabularies
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/metab5.html#sb5_0">B.5</a>&nbsp;&nbsp;&nbsp;&nbsp;
Source and Term Type Default Order of Precedence and Suppressibility
<dd><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/release_metadata.html#sb6_0">B.6</a>&nbsp;&nbsp;&nbsp;&nbsp;
Release Metadata<br /><br /><!-- use this for anchor <a name="si_0" id="si_0"> -->
<dt><a
href="http://www.nlm.nih.gov/archive/20081104/research/umls/umlsdoc_index.html#si_0">Documentation
Index</a> </dt></dl></div><!--body--><!-- ************************* Content end ************************* -->
<br/>
<b>First published: </b>20 July 2004<br/><b>Last updated: </b>31 March 2008<br/><b>Date Archived: </b>04 November 2008<br/><a href="http://www.nlm.nih.gov/cgi/viewMeta.pl?url=http://www.nlm.nih.gov/archive//20081104/research/umls/umlsdoc.html&amp;description=full" onclick="javascript:openPopup('http://www.nlm.nih.gov/cgi/viewMeta.pl?url=http://www.nlm.nih.gov/archive//20081104/research/umls/umlsdoc.html&amp;description=full'); return false;"><strong>Metadata</strong></a> | <b> <a href="http://www.nlm.nih.gov/permlevels.html"onclick="javascript:openPopup('http://www.nlm.nih.gov/permlevels.html'); return false;">Permanence level</a>: </b>Permanent: Stable Content<br/><A HREF="http://www.nlm.nih.gov/archive/20080312/research/umls/umlsdoc.html">Replaces</a> | <A HREF="http://www.nlm.nih.gov/archive/20090403/research/umls/umlsdoc.html">Replaced by</a>
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