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

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100 | <strong>SNOMED</strong> CT <strong>Release</strong> <strong>Format</strong> 1 (<strong>RF1</strong>) <strong>Guide</strong> July 2012<br />

2.3.7.4.2. Search index - structure diagram<br />

Figure 33: Search Index Overview (<strong>RF1</strong>)<br />

2.3.7.4.3. Word Search Tables - Summary<br />

The following five tables are included in the Developer Toolkit of <strong>SNOMED</strong> CT. These tables are derived<br />

from the <strong>SNOMED</strong> CT Descriptions Table. The LanguageCode of the Descriptions Table is used to choose<br />

only descriptions for a language.<br />

Table 31: Summary of Word Search Tables<br />

Table<br />

Excluded Words Table<br />

DescWordKey Table<br />

ConcWordKey Table<br />

Description<br />

Each row in this table is a word excluded from the list<br />

of possible keywords and dualkeys. Words are<br />

excluded if they are frequently used and are so limited<br />

in semantic specificity that they impair rather than<br />

enhance searches.<br />

Each row in this table is a word followed by a<br />

reference to a Description in which this word appears.<br />

Each row in this table is a word followed by a<br />

reference to a Concept. A Concept is referenced if<br />

the word appears anywhere in the combination of the<br />

Fully Specified Name with the current valid Preferred<br />

Term and Synonyms.<br />

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

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