{"resourceType":"StructureDefinition","id":"ElementDefinition.constraint.expression","meta":{"lastUpdated":"2021-01-17T07:06:13.533+11:00"},"url":"http://hl7.org/fhir/StructureDefinition/ElementDefinition.constraint.expression","version":"4.0.1","name":"ElementDefinition.constraint.expression","title":"ElementDefinition.constraint.expression","status":"draft","experimental":true,"date":"2021-01-17T07:06:13+11:00","publisher":"HL7 FHIR Standard","contact":[{"telecom":[{"system":"url","value":"http://hl7.org/fhir"}]}],"description":"Data Element for ElementDefinition.constraint.expression","purpose":"Data Elements are defined for each element to assist in questionnaire construction etc","fhirVersion":"4.0.1","mapping":[{"identity":"v2","uri":"http://hl7.org/v2","name":"HL7 v2 Mapping"},{"identity":"rim","uri":"http://hl7.org/v3","name":"RIM Mapping"},{"identity":"iso11179","uri":"http://metadata-standards.org/11179/","name":"ISO 11179"},{"identity":"dex","uri":"http://ihe.net/data-element-exchange","name":"IHE Data Element Exchange (DEX)"},{"identity":"loinc","uri":"http://loinc.org","name":"LOINC code for the element"}],"kind":"logical","abstract":false,"type":"ElementDefinition.constraint.expression","baseDefinition":"http://hl7.org/fhir/StructureDefinition/Element","derivation":"specialization","snapshot":{"element":[{"id":"ElementDefinition.constraint.expression","path":"ElementDefinition.constraint.expression","short":"FHIRPath expression of constraint","definition":"A [FHIRPath](fhirpath.html) expression of constraint that can be executed to see if this constraint is met.","comment":"In the absense of an expression, the expression is likely not enforceable by validators, and might be missed by many systems.","requirements":"Used by validation tooling tests of the validity of the resource.","min":0,"max":"1","base":{"path":"ElementDefinition.constraint.expression","min":0,"max":"1"},"type":[{"code":"string"}],"isModifier":false,"isSummary":true,"mapping":[{"identity":"rim","map":"N/A (MIF territory)"}]}]}}