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Updated CONCEPT_ANCESTOR (markdown)

clairblacketer 2017-06-20 13:42:51 -04:00
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StandardizedVocabularies/CONCEPT_ANCESTOR.md

@ -3,7 +3,7 @@ The CONCEPT_ANCESTOR table is designed to simplify observational analysis by pro
This table is entirely derived from the CONCEPT, CONCEPT_RELATIONSHIP and RELATIONSHIP tables.
Field|Required|Type|Description
:----|:----|:----|:-----
:---------------------------|:--------|:-----|:----------------------------------------------------
|ancestor_concept_id|Yes|integer|A foreign key to the concept in the concept table for the higher-level concept that forms the ancestor in the relationship.|
|descendant_concept_id|Yes|integer|A foreign key to the concept in the concept table for the lower-level concept that forms the descendant in the relationship.|
|min_levels_of_separation|Yes|integer|The minimum separation in number of levels of hierarchy between ancestor and descendant concepts. This is an attribute that is used to simplify hierarchic analysis.|