OSID - osid.repository.Composition Service Interface Definition

Interface	osid.repository.Composition
Implements	`osid.OsidObject`
	`osid.Containable`
	`osid.Operable`
	`osid.Sourceable`
Used By	`osid.repository.Asset`
	`osid.repository.CompositionAdminSession`
	`osid.repository.CompositionList`
	`osid.repository.CompositionLookupSession`
Description	A `Composition` represents an authenticatable identity. Like all OSID objects, a `Composition` is identified by its Id and any persisted references should use the Id.
Method	getChildrenIds
Description	Gets the child `Ids` of this composition.
Return	`osid.id.IdList`		the composition child `Ids`
Compliance	`mandatory`		This method must be implemented.
Method	getChildren
Description	Gets the children of this composition.
Return	`osid.repository.CompositionList`		the composition children
Errors	OPERATION_FAILED		unable to complete request
Compliance	`mandatory`		This method must be implemented.
Method	getCompositionRecord
Description	Gets the composition record corresponding to the given `Composition` record `Type`. This method is used to retrieve an object implementing the requested record. The `compositionRecordType` may be the `Type` returned in `getRecordTypes()` or any of its parents in a `Type` hierarchy where `hasRecordType(compositionRecordType)` is `true`.
Parameters	`osid.type.Type`	`compositionRecordType`	a composition record type
Return	`osid.repository.records.CompositionRecord`		the composition record
Errors	NULL_ARGUMENT		`compositionRecordType` is `null`
	OPERATION_FAILED		unable to complete request
	UNSUPPORTED		`hasRecordType(compositionRecordType)` is `false`
Compliance	`mandatory`		This method must be implemented.