> ## Documentation Index > Fetch the complete documentation index at: https://docs.metriport.com/llms.txt > Use this file to discover all available pages before exploring further. # OperationDefinition > A formal computable definition of an operation (on the RESTful interface) or a named query (using the search interaction). ## Properties | Name | Required | Type | Description | | ------------------- | -------- | ------------------------------------------------------------------ | ------------------------------------------------------------------------------------------ | | url | No | uri | Canonical identifier for this operation definition, represented as a URI (globally unique) | | version | No | string | Business version of the operation definition | | name | Yes | string | Name for this operation definition (computer friendly) | | title | No | string | Name for this operation definition (human friendly) | | status | Yes | code | draft / active / retired / unknown | | kind | Yes | code | operation / query | | experimental | No | boolean | For testing purposes, not real usage | | date | No | dateTime | Date last changed | | publisher | No | string | Name of the publisher (organization or individual) | | contact | No | [ContactDetail](/medical-api/fhir/data-types/contactdetail)\[] | Contact details for the publisher | | description | No | markdown | Natural language description of the operation definition | | useContext | No | [UsageContext](/medical-api/fhir/data-types/usagecontext)\[] | The context that the content is intended to support | | jurisdiction | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept)\[] | Intended jurisdiction for operation definition (if applicable) | | purpose | No | markdown | Why this operation definition is defined | | affectsState | No | boolean | Whether content is changed by the operation | | code | Yes | code | Name used to invoke the operation | | comment | No | markdown | Additional information about use | | base | No | canonical | Marks this as a profile of the base | | resource | No | code\[] | Types this operation applies to | | system | Yes | boolean | Invoke at the system level? | | type | Yes | boolean | Invoke at the type level? | | instance | Yes | boolean | Invoke on an instance? | | inputProfile | No | canonical | Validation information for in parameters | | outputProfile | No | canonical | Validation information for out parameters | | parameter | No | OperationDefinitionParameter | Parameters for the operation/query | | - id | No | string | Unique id for inter-element referencing | | - extension | No | [Extension](/medical-api/fhir/data-types/extension)\[] | Additional content defined by implementations | | - modifierExtension | No | [Extension](/medical-api/fhir/data-types/extension)\[] | Extensions that cannot be ignored even if unrecognized | | - name | Yes | code | Name in Parameters.parameter.name or in URL | | - use | Yes | code | in / out | | - min | Yes | integer | Minimum Cardinality | | - max | Yes | string | Maximum Cardinality (a number or \*) | | - documentation | No | string | Description of meaning/use | | - type | No | code | What type this parameter has | | - targetProfile | No | canonical\[] | If type is Reference / canonical, allowed targets | | - searchType | No | code | number / date / string / token / reference / composite / quantity / uri / special | | - binding | No | OperationDefinitionParameterBinding | ValueSet details if this is coded | | - id | No | string | Unique id for inter-element referencing | | - extension | No | [Extension](/medical-api/fhir/data-types/extension)\[] | Additional content defined by implementations | | - modifierExtension | No | [Extension](/medical-api/fhir/data-types/extension)\[] | Extensions that cannot be ignored even if unrecognized | | - strength | Yes | code | required / extensible / preferred / example | | - valueSet | Yes | canonical | Source of value set | | - referencedFrom | No | OperationDefinitionParameterReferencedFrom | References to this parameter | | - id | No | string | Unique id for inter-element referencing | | - extension | No | [Extension](/medical-api/fhir/data-types/extension)\[] | Additional content defined by implementations | | - modifierExtension | No | [Extension](/medical-api/fhir/data-types/extension)\[] | Extensions that cannot be ignored even if unrecognized | | - source | Yes | string | Referencing parameter | | - sourceId | No | string | Element id of reference | | - part | No | \[] | Parts of a nested Parameter | | overload | No | OperationDefinitionOverload | Define overloaded variants for when generating code | | - id | No | string | Unique id for inter-element referencing | | - extension | No | [Extension](/medical-api/fhir/data-types/extension)\[] | Additional content defined by implementations | | - modifierExtension | No | [Extension](/medical-api/fhir/data-types/extension)\[] | Extensions that cannot be ignored even if unrecognized | | - parameterName | No | string\[] | Name of parameter to include in overload | | - comment | No | string | Comments to go on overload | ## Search Parameters | Name | Type | Description | Expression | | --------------------- | --------- | ------------------------------------------------------------------------------------------ | ------------------------------------ | | context | token | A use context assigned to the operation definition | OperationDefinition.useContext.value | | context-quantity | quantity | A quantity- or range-valued use context assigned to the operation definition | OperationDefinition.useContext.value | | context-type | token | A type of use context assigned to the operation definition | OperationDefinition.useContext.code | | date | date | The operation definition publication date | OperationDefinition.date | | description | string | The description of the operation definition | OperationDefinition.description | | jurisdiction | token | Intended jurisdiction for the operation definition | OperationDefinition.jurisdiction | | name | string | Computationally friendly name of the operation definition | OperationDefinition.name | | publisher | string | Name of the publisher of the operation definition | OperationDefinition.publisher | | status | token | The current status of the operation definition | OperationDefinition.status | | title | string | The human-friendly name of the operation definition | OperationDefinition.title | | url | uri | The uri that identifies the operation definition | OperationDefinition.url | | version | token | The business version of the operation definition | OperationDefinition.version | | context-type-quantity | composite | A use context type and quantity- or range-based value assigned to the operation definition | OperationDefinition.useContext | | context-type-value | composite | A use context type and value assigned to the operation definition | OperationDefinition.useContext | | base | reference | Marks this as a profile of the base | OperationDefinition.base | | code | token | Name used to invoke the operation | OperationDefinition.code | | input-profile | reference | Validation information for in parameters | OperationDefinition.inputProfile | | instance | token | Invoke on an instance? | OperationDefinition.instance | | kind | token | operation / query | OperationDefinition.kind | | output-profile | reference | Validation information for out parameters | OperationDefinition.outputProfile | | system | token | Invoke at the system level? | OperationDefinition.system | | type | token | Invoke at the type level? | OperationDefinition.type | ## Inherited Properties | Name | Required | Type | Description | | ----------------- | -------- | ------------------------------------------------------ | ------------------------------------------------------ | | id | No | string | Logical id of this artifact | | meta | No | [Meta](/medical-api/fhir/data-types/meta) | Metadata about the resource | | implicitRules | No | uri | A set of rules under which this content was created | | language | No | code | Language of the resource content | | text | No | [Narrative](/medical-api/fhir/data-types/narrative) | Text summary of the resource, for human interpretation | | contained | No | Resource\[] | Contained, inline Resources | | extension | No | [Extension](/medical-api/fhir/data-types/extension)\[] | Additional content defined by implementations | | modifierExtension | No | [Extension](/medical-api/fhir/data-types/extension)\[] | Extensions that cannot be ignored | To view the FHIR specification for this resource, see [OperationDefinition](https://www.hl7.org/fhir/StructureDefinition/OperationDefinition).