(your module is not a subclass of Class::Struct now is it)

Quibble: that is not quite the right formulation. It is not necessary for a hypothetical Class::Struct::Persistent to be a subclass of Class::Struct, although one would expect the functionality to be some sort of refinement of it. Subclass would only apply in the broad sense, not the specific, object-inheritance sense.

...now, that is not to say that Class::Struct::Persistent is the best name, but that's why this thread is here...

yours,
Michael