# StructureDefinition ## Get FHIR r4 structure definitions - [GET /site/{siteId}/fhir/structure-definition](https://docs.heydonto.com/apis/fhir/openapi/structuredefinition/fhirstructuredefinitioncontroller_getstructuredefinitions.md) ## Create FHIR r4 structure definition - [POST /site/{siteId}/fhir/structure-definition](https://docs.heydonto.com/apis/fhir/openapi/structuredefinition/fhirstructuredefinitioncontroller_createstructuredefinition.md) ## Get FHIR r4 structure definition by ID - [GET /site/{siteId}/fhir/structure-definition/{id}](https://docs.heydonto.com/apis/fhir/openapi/structuredefinition/fhirstructuredefinitioncontroller_getstructuredefinition.md) ## Update FHIR r4 structure definition - [PUT /site/{siteId}/fhir/structure-definition/{id}](https://docs.heydonto.com/apis/fhir/openapi/structuredefinition/fhirstructuredefinitioncontroller_updatestructuredefinition.md) ## Delete FHIR r4 structure definition - [DELETE /site/{siteId}/fhir/structure-definition/{id}](https://docs.heydonto.com/apis/fhir/openapi/structuredefinition/fhirstructuredefinitioncontroller_deletestructuredefinition.md) ## Get FHIR r4 structure definition history by ID - [GET /site/{siteId}/fhir/structure-definition/{id}/history](https://docs.heydonto.com/apis/fhir/openapi/structuredefinition/fhirstructuredefinitioncontroller_getstructuredefinitionhistory.md)