description: The sequential number assigned to each Test or Stage to specify the order of display on the Quality Specification. package_name: hl7.fhir.us.pq-cmc-fda derivation: constraint name: TestOrderExtension type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://hl7.org/fhir/us/pq-cmc-fda/StructureDefinition/pq-order-extension'} index: 1 value: constraint: cmc-greater-than-zero: {human: Hierachial levels are greater than 0, source: 'http://hl7.org/fhir/us/pq-cmc-fda/StructureDefinition/pq-order-extension', severity: error, expression: ($this > 0) = true} choices: [valueDecimal] index: 3 valueDecimal: type: decimal constraint: cmc-greater-than-zero: {human: Hierachial levels are greater than 0, source: 'http://hl7.org/fhir/us/pq-cmc-fda/StructureDefinition/pq-order-extension', severity: error, expression: ($this > 0) = true} choiceOf: value index: 4 package_version: 1.0.0-ballot extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/us/pq-cmc-fda/StructureDefinition/pq-order-extension base: http://hl7.org/fhir/StructureDefinition/Extension version: 1.0.0-ballot