Targeting classes?

Hi,

This is a newbie question, though I couldn’t find an answer in the SHACL spec or the mailing list archive.

I would like to specify shapes that subclasses of a specific class should satisfy. SHACL’s target declaration mechanisms don’t seem to allow that that kind of specification. 

I know that I can use OWL’s punning feature to treat the classes as if they were individuals (by making the class IRIs instances of another class), but I am hoping that I don’t need to do that.

Any suggestions or pointers?

Thank you.

With best regards,
Samson