OSID - osid.resource.ResourceRelationship Service Interface Definition

Interface	osid.resource.ResourceRelationship
Implements	`osid.OsidRelationship`
Used By	`osid.resource.ResourceRelationshipAdminSession`
	`osid.resource.ResourceRelationshipList`
	`osid.resource.ResourceRelationshipLookupSession`
Description	`ResourceRelationship` relates two resources.
Method	getSourceResourceId
Description	Gets the source resource `Id`.
Return	`osid.id.Id`		a resource `Id`
Compliance	`mandatory`		This method must be implemented.
Method	getSourceResource
Description	Gets the `Resource`.
Return	`osid.resource.Resource`		the source resource
Errors	OPERATION_FAILED		unable to complete request
Compliance	`mandatory`		This method must be implemented.
Method	getDestinationResourceId
Description	Gets the destination resource `Id`.
Return	`osid.id.Id`		a resource `Id`
Compliance	`mandatory`		This method must be implemented.
Method	getDestinationResource
Description	Gets the `Resource`.
Return	`osid.resource.Resource`		the destination resource
Errors	OPERATION_FAILED		unable to complete request
Compliance	`mandatory`		This method must be implemented.
Method	getResourceRelationshipRecord
Description	Gets the resource relationship record corresponding to the given `ResourceRelationship` record `Type`. This method is used to retrieve an object implementing the requested record. The `resourceRelationshipRecordType` may be the `Type` returned in `getRecordTypes()` or any of its parents in a `Type` hierarchy where `hasRecordType(resourceRelationshipRecordType)` is `true`.
Parameters	`osid.type.Type`	`resourceRelationshipRecordType`	the type of the record to retrieve
Return	`osid.resource.records.ResourceRelationshipRecord`		the resource relationship record
Errors	NULL_ARGUMENT		`resourceRelationshipRecordType` is `null`
	OPERATION_FAILED		unable to complete request
	UNSUPPORTED		`hasRecordType(resourceRelationshipRecordType)` is `false`
Compliance	`mandatory`		This method must be implemented.