{"affectsState":false,"code":"transform","comment":"The input and return are specified as 'Resources'. In most usage of the $transform operation, either the input or return content is not a valid FHIR resource. In these cases, the return type is actually a [Binary](binary.html) resource. For this operation, the Binary resources may be encoded directly, using a mime-type, as shown in the example. Note: this specification does not yet address the means by which the servers may know the correct mime types for the various content involved","contact":[{"telecom":[{"system":"url","value":"http://hl7.org/fhir"},{"system":"email","value":"fhir@lists.hl7.org"}]},{"telecom":[{"system":"url","value":"http://www.hl7.org/Special/committees/fiwg"}]}],"date":"2026-03-31T18:55:04+00:00","description":"The transform operation takes input content, applies a structure map transform, and then returns the output.","experimental":false,"extension":[{"url":"http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm","valueInteger":2},{"url":"http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status","valueCode":"normative"},{"url":"http://hl7.org/fhir/StructureDefinition/structuredefinition-wg","valueCode":"fhir"}],"id":"StructureMap-transform","instance":true,"jurisdiction":[{"coding":[{"code":"001","display":"World","system":"http://unstats.un.org/unsd/methods/m49/m49.htm"}]}],"kind":"operation","name":"Transform","parameter":[{"documentation":"The structure map to apply. This is only needed if the operation is invoked at the resource level and no structureMap has been provided. If the $transform operation is invoked on a particular structure map, this will be ignored by the server","max":"1","min":0,"name":"source","scope":["type"],"type":"uri","use":"in"},{"documentation":"The structure map to apply. This is only needed when the operation is invoked at the resource level and no URI has been provided.","max":"1","min":0,"name":"sourceMap","type":"StructureMap","use":"in"},{"documentation":"StructureMap resources that support the source map. If a source URL is provided, the map can be provided in this parameter (or it can be provided as sourceMap).","max":"*","min":0,"name":"supportingMap","type":"StructureMap","use":"in"},{"documentation":"The same as structureMap, but the resource is provided in the mapping language rather than as a structureMap.","max":"*","min":0,"name":"srcMap","type":"string","use":"in"},{"documentation":"The logical content to transform","max":"1","min":1,"name":"content","type":"Resource","use":"in"},{"documentation":"The result of the transform","max":"1","min":1,"name":"return","type":"Resource","use":"out"}],"publisher":"HL7 International / FHIR Infrastructure","resource":["StructureMap"],"resourceType":"OperationDefinition","status":"active","system":false,"text":{"div":"<div xmlns=\"http://www.w3.org/1999/xhtml\"><p class=\"res-header-id\"><b>Generated Narrative: OperationDefinition StructureMap-transform</b></p><a name=\"StructureMap-transform\"> </a><a name=\"hcStructureMap-transform\"> </a><p>URL: [base]/StructureMap/$transform</p><p>URL: [base]/StructureMap/[id]/$transform</p><h3>Parameters</h3><table class=\"grid\"><tr><td><b>Use</b></td><td><b>Name</b></td><td><b>Scope</b></td><td><b>Cardinality</b></td><td><b>Type</b></td><td><b>Binding</b></td><td><b>Documentation</b></td></tr><tr><td>IN</td><td>source</td><td>type</td><td>0..1</td><td><a href=\"datatypes.html#uri\">uri</a></td><td/><td><div><p>The structure map to apply. This is only needed if the operation is invoked at the resource level and no structureMap has been provided. If the $transform operation is invoked on a particular structure map, this will be ignored by the server</p>\n</div></td></tr><tr><td>IN</td><td>sourceMap</td><td/><td>0..1</td><td><a href=\"structuremap.html\">StructureMap</a></td><td/><td><div><p>The structure map to apply. This is only needed when the operation is invoked at the resource level and no URI has been provided.</p>\n</div></td></tr><tr><td>IN</td><td>supportingMap</td><td/><td>0..*</td><td><a href=\"structuremap.html\">StructureMap</a></td><td/><td><div><p>StructureMap resources that support the source map. If a source URL is provided, the map can be provided in this parameter (or it can be provided as sourceMap).</p>\n</div></td></tr><tr><td>IN</td><td>srcMap</td><td/><td>0..*</td><td><a href=\"datatypes.html#string\">string</a></td><td/><td><div><p>The same as structureMap, but the resource is provided in the mapping language rather than as a structureMap.</p>\n</div></td></tr><tr><td>IN</td><td>content</td><td/><td>1..1</td><td><a href=\"resource.html\">Resource</a></td><td/><td><div><p>The logical content to transform</p>\n</div></td></tr><tr><td>OUT</td><td>return</td><td/><td>1..1</td><td><a href=\"resource.html\">Resource</a></td><td/><td><div><p>The result of the transform</p>\n</div></td></tr></table><div><p>The input and return are specified as 'Resources'. In most usage of the $transform operation, either the input or return content is not a valid FHIR resource. In these cases, the return type is actually a <a href=\"binary.html\">Binary</a> resource. For this operation, the Binary resources may be encoded directly, using a mime-type, as shown in the example. Note: this specification does not yet address the means by which the servers may know the correct mime types for the various content involved</p>\n</div></div>","status":"generated"},"title":"Model Instance Transformation","type":true,"url":"http://hl7.org/fhir/OperationDefinition/StructureMap-transform","version":"6.0.0-ballot4"}