description: Consumers of the code system and the implementations, projects or standards that the author has used the code system in. The use of this extension in no way restricts the use of the code system. package_name: hl7.fhir.uv.extensions derivation: constraint name: CSUsage type: Extension elements: extension: isModifier: false short: A consumer of or client for the code system type: Extension index: 0 slicing: slices: user: match: {} schema: isModifier: false short: A consumer of or client for the code system type: Extension _required: true index: 0 extensions: {} elements: extension: {index: 1} url: type: uri pattern: {type: Uri, value: user} index: 2 value: choices: [valueString] index: 4 valueString: {type: string, choiceOf: value, index: 5} required: [valueString, value] use: match: {} schema: isModifier: false short: Implementation/project/standard that uses the code system type: Extension _required: true index: 6 extensions: {} elements: extension: {index: 7} url: type: uri pattern: {type: Uri, value: use} index: 8 value: choices: [valueString] index: 10 valueString: {type: string, choiceOf: value, index: 11} required: [valueString, value] url: pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/codesystem-usage'} index: 12 value: choices: [] index: 14 package_version: 5.2.0-ballot extensions: user: isModifier: false short: A consumer of or client for the code system index: 0 type: Extension elements: extension: {index: 1} url: type: uri pattern: {type: Uri, value: user} index: 2 value: choices: [valueString] index: 4 valueString: {type: string, choiceOf: value, index: 5} _required: true extensions: {} url: null required: [valueString, value] use: isModifier: false short: Implementation/project/standard that uses the code system index: 6 type: Extension elements: extension: {index: 7} url: type: uri pattern: {type: Uri, value: use} index: 8 value: choices: [valueString] index: 10 valueString: {type: string, choiceOf: value, index: 11} _required: true extensions: {} url: null required: [valueString, value] class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/codesystem-usage base: http://hl7.org/fhir/StructureDefinition/Extension version: 5.2.0-ballot required: [extension]