A test to determine whether a specified SNOMED CT component is a member of a specified reference set.


  • A component is a member of a reference set if at least one active row in that reference set has a referenceComponentId that matches the identifier of that component. Otherwise, a component is not a member of that reference set.
  • Reference set membership tests may be used to filter searches or as part of a expression constraint or query.
  • In an expression constraint reference set membership test is represented by the symbol ^ followed by a concept id identifying the reference set.

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