Models and Standards

Supported Standards

Many terminology standards have been created by various organizations.  Each of the following pages has more detail on individual standards introduced or supported by the LexGrid architecture.

CTS (Common Terminology Services) and LQS (Lexicon Query Services) are both API's for accessing content that is stored in the LexGrid Model.

UMLS (Unified Medical Language System) is a standard distribution format from the National Library of Medicine.  RRF or Rich Release Format is an updated file format used in recent releases of the NCI MetaThesaurus.