description: This Extension profile indicates how systems have to deal with messages in terms of duplicates, lack of responses. package_name: hl7.fhir.us.ph-library derivation: constraint name: USPublicHealthMessageProcessingCategoryExtension type: Extension elements: extension: {index: 0} url: pattern: {type: uri, value: 'http://hl7.org/fhir/us/ph-library/StructureDefinition/us-ph-message-processing-category-extension'} type: uri index: 1 value: short: The message processing requirements identified by the message choices: [valueCode] index: 3 valueCode: {type: code, short: The message processing requirements identified by the message, choiceOf: value, index: 4} package_version: 2.0.0-ballot extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/us/ph-library/StructureDefinition/us-ph-message-processing-category-extension base: http://hl7.org/fhir/StructureDefinition/Extension version: 2.0.0-ballot