> ## Documentation Index > Fetch the complete documentation index at: https://docs.eorion.com/llms.txt > Use this file to discover all available pages before exploring further. # 通过key获取 > Retrieves the latest version of the process definition which belongs to no tenant according to the `ProcessDefinition` interface in the engine. ## OpenAPI ````yaml GET /process-definition/key/{key} openapi: 3.0.2 info: title: ORION Platform REST API description: OpenApi Spec for ORION Camunda Platform REST API. version: 7.22.6-ee license: name: Apache License 2.0 url: http://www.apache.org/licenses/LICENSE-2.0.html servers: - url: http://{host}:{port}/{contextPath} description: The API server for the default process engine variables: host: default: localhost port: default: '8080' contextPath: default: engine-rest - url: http://{host}:{port}/{contextPath}/engine/{engineName} description: The API server for a named process engine variables: host: default: localhost port: default: '8080' contextPath: default: engine-rest engineName: default: default - url: '{url}' description: The API server with a custom url variables: url: default: '' security: - basicAuth: [] tags: - name: Authorization - name: Batch - name: Condition - name: Decision Definition - name: Decision Requirements Definition - name: Deployment - name: Engine - name: Event Subscription - name: Execution - name: External Task - name: Filter - name: Group - name: Historic Activity Instance - name: Historic Batch - name: Historic Decision Definition - name: Historic Decision Instance - name: Historic Decision Requirements Definition - name: Historic Detail - name: Historic External Task Log - name: Historic Identity Link Log - name: Historic Incident - name: Historic Job Log - name: Historic Process Definition - name: Historic Process Instance - name: Historic Task Instance - name: Historic User Operation Log - name: Historic Variable Instance - name: History Cleanup - name: Identity - name: Incident - name: Job - name: Job Definition - name: Message - name: Metrics - name: Migration - name: Modification - name: Process Definition - name: Process Instance - name: Signal - name: Schema Log - name: Task - name: Task Attachment - name: Task Comment - name: Task Identity Link - name: Task Local Variable - name: Task Variable - name: Telemetry - name: Tenant - name: User - name: Variable Instance - name: Version externalDocs: description: Find out more about ORION Rest API url: https://docs.eorion.com paths: /process-definition/key/{key}: get: tags: - Process Definition summary: Get description: >- Retrieves the latest version of the process definition which belongs to no tenant according to the `ProcessDefinition` interface in the engine. operationId: getProcessDefinitionByKey parameters: - name: key in: path schema: type: string required: true description: >- The key of the process definition (the latest version thereof) to be retrieved. responses: '200': content: application/json: schema: $ref: '#/components/schemas/ProcessDefinitionDto' examples: example-1: summary: Status 200 response description: Response of GET `/process-definition/key/invoice` value: id: invoice:1:c3a63aaa-2046-11e7-8f94-34f39ab71d4e key: invoice category: http://www.omg.org/spec/BPMN/20100524/MODEL description: null name: Invoice Receipt version: 1 resource: invoice.v1.bpmn deploymentId: c398cd26-2046-11e7-8f94-34f39ab71d4e diagram: null suspended: false tenantId: null versionTag: null historyTimeToLive: 5 startableInTasklist: true description: Request successful. '400': content: application/json: schema: $ref: '#/components/schemas/ExceptionDto' description: >- Process definition with given `key` does not exist. See the [Introduction](https://docs.camunda.org/manual/7.22/reference/rest/overview/#error-handling) for the error response format. components: schemas: ProcessDefinitionDto: type: object properties: id: type: string nullable: true description: The id of the process definition key: type: string nullable: true description: >- The key of the process definition, i.e., the id of the BPMN 2.0 XML process definition. category: type: string nullable: true description: The category of the process definition. description: type: string nullable: true description: The description of the process definition. name: type: string nullable: true description: The name of the process definition. version: type: integer format: int32 nullable: true description: >- The version of the process definition that the engine assigned to it. resource: type: string nullable: true description: The file name of the process definition. deploymentId: type: string nullable: true description: The deployment id of the process definition. diagram: type: string nullable: true description: The file name of the process definition diagram, if it exists. suspended: type: boolean nullable: true description: A flag indicating whether the definition is suspended or not. tenantId: type: string nullable: true description: The tenant id of the process definition. versionTag: type: string nullable: true description: The version tag of the process definition. historyTimeToLive: type: integer format: int32 nullable: true minimum: 0 description: >- History time to live value of the process definition. Is used within [History cleanup](https://docs.camunda.org/manual/7.22/user-guide/process-engine/history/#history-cleanup). startableInTasklist: type: boolean nullable: true description: >- A flag indicating whether the process definition is startable in Tasklist or not. ExceptionDto: title: ExceptionDto type: object properties: type: type: string nullable: true description: An exception class indicating the occurred error. message: type: string nullable: true description: A detailed message of the error. code: type: number description: >- The code allows your client application to identify the error in an automated fashion. You can look up the meaning of all built-in codes and learn how to add custom codes in the [User Guide](https://docs.camunda.org/manual/7.22/user-guide/process-engine/error-handling/#exception-codes). securitySchemes: basicAuth: type: http scheme: basic ````