description: Indicates how systems have to deal with messages in terms of duplicates, lack of responses. package_name: hl7.fhir.us.ecr derivation: constraint name: USPublicHealthMessageProcessingCategoryExtension type: Extension elements: url: type: uri pattern: {type: Uri, value: 'http://hl7.org/fhir/us/ecr/StructureDefinition/us-ph-message-processing-category-extension'} index: 0 value: short: The message processing requirements identified by the message choices: [valueCode] index: 2 valueCode: {type: code, short: The message processing requirements identified by the message, choiceOf: value, index: 3} package_version: 2.0.0 class: extension kind: complex-type url: http://hl7.org/fhir/us/ecr/StructureDefinition/us-ph-message-processing-category-extension base: http://hl7.org/fhir/StructureDefinition/Extension version: 2.0.0