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SNOMED CT® Release Format 1 (RF1) Guide - ihtsdo

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Table<br />

DescDualKey Table<br />

ConcDualKey Table<br />

Description<br />

Each row in this table is a six-character string<br />

representing the first three letters of a pair of words<br />

followed by a reference to a Description in which these<br />

two words appear.<br />

Each row in this table is a six-character string<br />

representing the first three letters of a pair of words<br />

followed by a reference to a Concept. A Concept is<br />

referenced if both words appear anywhere in the<br />

combination of the Fully Specified Name with the<br />

current valid Preferred Term and Synonyms.<br />

All keywords are regarded as case independent and are presented in the word search tables in upper case.<br />

Case dependent searching can be applied by appropriately filtering the candidate matches.<br />

2.3.7.4.4. Word Equivalents<br />

The Word Equivalent Table is included in the Developer Toolkit of <strong>SNOMED</strong> CT. It supports enhanced<br />

searches that take into account semantically similar words such as KIDNEY and RENAL. It also provides<br />

commonly used abbreviations. This table can be used by implementers to offer additional search capability<br />

in applications without greatly increasing the volume of synonyms. It is not intended as a comprehensive<br />

dictionary of words. Many searches can be completed without using this table; like the other word search<br />

tables, it is completely optional and can be used as an example of a capability that may be customized and<br />

extended by <strong>SNOMED</strong> CT implementers.<br />

2.3.7.4.4.1. Word Equivalents Tables - Summary<br />

Table 32: Word Equivalents Table<br />

Key Fields<br />

WordBlockNumber<br />

WordText<br />

Data Fields<br />

WordType<br />

WordRole<br />

A 32-bit integer shared by a set of equivalent words or phrases. The<br />

WordBlockNumber links together several rows that have an identical or similar<br />

meaning.<br />

A word, phrase, acronym or abbreviation that is equivalent to the WordText of<br />

other rows that share the same WordBlockId.<br />

An integer indicating the type of equivalence<br />

Structure and Content <strong>Guide</strong> | 101<br />

An integer indicating the usual role of this word. This should be considered if<br />

attempting to find a post-coordinated combination of Concepts that matches a<br />

phrase.<br />

© 2002-2012 International Health Terminology Standards Development Organisation CVR #: 30363434

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