SNOMED International Leading healthcare terminology, worldwide

SNOMED International APG Parser

SNOMED CT Expression Constraint Language Parser - Long Syntax

This parser validates the input string according to the ABNF long syntax defined for the SNOMED CT Expression Constraint Language v1.3 ( The long syntax is provided for information only, and may be used where an English-based textual representation of the language is required.

A SNOMED CT Expression Constraint is a computable rule that defines a bounded set of clinical meanings. The Expression Constraint Language enables intensional definitions to be created for use cases such as terminology bindings, intensional reference set definitions, SNOMED CT content queries, and SNOMED CT conept model specifications.

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

The Parser's Output: