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Technical Correction
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Resolution: Persuasive
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Medium
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Clinical Quality Language (FHIR)
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1.5.0
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Clinical Decision Support
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Appendix B - Reference
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Correction
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Non-substantive
To ensure compatibility with FHIRPath, as well as to support distinct semantics consistent with most SQL implementations, CQL considers `null` to be equal when determining list membership. This clarification was made in this ticket:
https://jira.hl7.org/browse/FHIR-35904
However, this clarification does not appear to have been applied in all places. Specifically, at least the IndexOf and List Equality operators.
https://cql.hl7.org/09-b-cqlreference.html#indexof
https://cql.hl7.org/09-b-cqlreference.html#equal-2