description: This extension provides a comment explaining the why an IG depends on another IG. package_name: hl7.fhir.uv.tools.r5 derivation: constraint name: IGDependencyComment type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://hl7.org/fhir/tools/StructureDefinition/implementationguide-dependency-comment'} index: 1 value: choices: [valueMarkdown] index: 3 valueMarkdown: {type: markdown, choiceOf: value, index: 4} package_version: 0.4.0 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/tools/StructureDefinition/implementationguide-dependency-comment base: http://hl7.org/fhir/StructureDefinition/Extension version: 0.4.0 required: [valueMarkdown, value]