OSID - osid.id.Id Service Interface Definition

Interface	osid.id.Id
Implements	`osid.OsidPrimitive`
Description	`Id` represents an identifier object. Ids are designated by the following elements: `identifier:` a unique key or guid `namespace:` the namespace of the identifier `authority:` the issuer of the identifier Two Ids are equal if their namespace, identifier and authority strings are equal. Only the identifier is case-sensitive. Persisting an `Id` means persisting the above components.
Method	getAuthority
Description	Gets the authority of this `Id.` The authority is a string used to ensure the uniqueness of this `Id` when using a non-federated identifier space. Generally, it is a service name identifying the provider of this `Id.` This method is used to compare one `Id` to another.
Return	`string`	the authority of this `Id`
Compliance	`mandatory`	This method must be implemented.
Method	getIdentifierNamespace
Description	Gets the namespace of the identifier. The namespace reflects the domain in which the identifier is unique. When using a global identifier schema, the namespace may indicate the name of the scheme. When using a local identification scheme, the namespace may be more specific, such as the name of a database or file in which the identifiers exist. Federating adapters may use a custom namespace to include information for routing. This method is used to compare one `Id` to another.
Return	`string`	the authority of this `Id`
Compliance	`mandatory`	This method must be implemented.
Method	getIdentifier
Description	Gets the identifier of this `Id.` This method is used to compare one `Id` to another.
Return	`string`	the identifier of this `Id`
Compliance	`mandatory`	This method must be implemented.