description: This cross-version extension represents Sequence.referenceSeq.referenceSeqPointer from http://hl7.org/fhir/StructureDefinition/Sequence|3.0.2 for use in FHIR R4. package_name: hl7.fhir.uv.xver derivation: constraint name: ext_R3_Sequence_re_referenceSeqPointer type: Extension elements: value: base: {path: 'Extension.value[x]'} short: A Pointer to another Sequence entity as reference sequence choices: [valueReference] index: 1 valueReference: base: {path: 'Extension.value[x]'} type: Reference short: A Pointer to another Sequence entity as reference sequence choiceOf: value refers: ['http://hl7.org/fhir/StructureDefinition/Sequence'] index: 2 url: pattern: {type: Uri, value: 'http://hl7.org/fhir/3.0/StructureDefinition/extension-Sequence.referenceSeq.referenceSeqPointer'} index: 3 package_version: r3.r4-0.0.1-snapshot-1 class: extension kind: complex-type url: http://hl7.org/fhir/3.0/StructureDefinition/extension-Sequence.referenceSeq.referenceSeqPointer base: http://hl7.org/fhir/StructureDefinition/Extension version: 0.0.1-snapshot-1 required: [url]