OSID - osid.course.program.Credential Service Interface Definition

Interface	osid.course.program.Credential
Implements	`osid.OsidObject`
Used By	`osid.course.chronicle.CredentialEntry`
	`osid.course.program.CredentialAdminSession`
	`osid.course.program.CredentialList`
	`osid.course.program.CredentialLookupSession`
	`osid.course.requisite.CredentialRequirement`
Description	A `Credential` represents something awarded at program completion.
Method	hasLifeTime
Description	Tests if this credential has a limited lifetime.
Return	`boolean`		`true` if this credential expires, `false` if permanent
Compliance	`mandatory`		This method is must be implemented.
Method	getLifetime
Description	Gets the lifetime of this credential once awarded.
Return	`osid.calendaring.Duration`		the lifetime
Errors	ILLEGAL_STATE		`hasLifetime()` is `false`
Compliance	`mandatory`		This method must be implemented.
Method	getCredentialRecord
Description	Gets the credential record corresponding to the given `Credential` record `Type`. This method is used to retrieve an object implementing the requested record. The `credentialRecordType` may be the `Type` returned in `getRecordTypes()` or any of its parents in a `Type` hierarchy where `hasRecordType(credentialRecordType)` is `true`.
Parameters	`osid.type.Type`	`credentialRecordType`	the type of credential record to retrieve
Return	`osid.course.program.records.CredentialRecord`		the credential record
Errors	NULL_ARGUMENT		`credentialRecordType` is `null`
	OPERATION_FAILED		unable to complete request
	UNSUPPORTED		`hasRecordType(credentialRecordType)` is `false`
Compliance	`mandatory`		This method must be implemented.