>So - to put it into English - and please correct me if I'm wrong - in fact, I think I might still be off or incomplete - "interface inheritance" as used here means somehow "declaring" to the system-at-large what my interface is? - that is what public PEMS it supports?

Sort of, and partly. It's both giving a name to your set of PEMs, and declaring to the 'system' that your server also supports and implements named interfaces that are required for interaction with certain clients. Like COM+.

>I am still confused on the concept of a "named interface" I think. Any examples or articles I could look at for an introduction on this subject?

There is an article in MSDN called:
"Understanding Interface-based Programming" by Ted Pattison.

VFP programmers aren't generally familiar with these concepts because until VFP 7, these concepts don't apply.