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SNOMED International APG Parser

SNOMED CT Expression Constraint Language Parser - Brief Syntax

This parser validates the input string according to the ABNF brief syntax defined for the SNOMED CT Expression Constraint Language v1.3 (http://snomed.org/ecl). The brief syntax is the normative syntax for expression constraints, and is recommended for use in interoperable communications between systems.

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: