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SNOMED International APG Parser

SNOMED CT Compositional Grammar

This parser validates an input string according to the ABNF syntax defined for SNOMED CT Compositional Grammar v2.3.1 (

SNOMED CT Compositional Grammar is a lightweight syntax for the representation of SNOMED CT expressions. SNOMED CT expressions are used in Electronic Health Records (EHRs) to represent clinical meanings in a way that enables automatic interpretation. They are also carried in messages, used to define precoordinated concepts and used to represent links between SNOMED CT and other terminologies.

The Input String: (edit and click "Parse")

The Parser's Output: