description: This cross-version extension represents Attachment.pages from http://hl7.org/fhir/StructureDefinition/Attachment|5.0.0 for use in FHIR R4B. package_name: hl7.fhir.uv.xver-r5.r4b derivation: constraint name: ext_R5_Attachment_pages type: Extension elements: value: base: {path: 'Extension.value[x]'} short: Number of printed pages choices: [valuePositiveInt] index: 1 valuePositiveInt: base: {path: 'Extension.value[x]'} type: positiveInt short: Number of printed pages choiceOf: value index: 2 url: pattern: {type: Uri, value: 'http://hl7.org/fhir/5.0/StructureDefinition/extension-Attachment.pages'} index: 3 package_version: 0.0.1-snapshot-1 class: extension kind: complex-type url: http://hl7.org/fhir/5.0/StructureDefinition/extension-Attachment.pages base: http://hl7.org/fhir/StructureDefinition/Extension version: 0.0.1-snapshot-1 required: [url]