'ObjectId is a mandatory property that is used to opaquely and uniquely identify an instance of a class. ObjectIds must be unique within the scope of the management server (which is hosting the provider). The ObjectId is created and maintained for use of the Storage Management Providers and their clients to track instances of objects. If an object is visible through two different paths (for example: there are two separate Storage Management Providers that point to the same storage subsystem) then the same object may appear with two different ObjectIds. For determining if two object instances are the same object, refer to the UniqueId property.'
'PassThroughIds is a comma-separated list of all implementation specific keys. It is used by storage management applications to access the vendor proprietary object model. This field should be in the form: key1='value1',key2='value2'.'
'UniqueId is a mandatory property that is used to uniquely identify a logical instance of a storage subsystem's object. This value must be the same for an object viewed by two or more provider instances (even if they are running on seperate management servers). UniqueId can be any globally unique, opaque value unless otherwise specified by a derived class.'