PGP vs. GPG

[Jure Mercun <jure.mercun@guest.arnes.si>]

Hi!

I have some problems (as usually...)...
They're probably pretty lame, but I can't
find the answers, so here they go:

I don't have a lot of experiences with
PGP and GPG but it seems that PGP doesn't
recognize GPG's keys and vice versa. Is
there some way, to make a key that would
work on both?

I was testing with GPG(0.4.3-1) and
PGP(2.6.3a-4 and 5.0-3). I still use slink...

Btw, the keys seem to work even after
the expirery (is it spelled correctly?) date.
What are they used for(the dates)? Are they
only information for the user?

How exactly can a revocation certificate
be used? I read that it can be used to make
the key useless... How?

Thanks,
Jure Mercun

jure.mercun@guest.arnes.si
PGP/GPG keys missing for apparent reasons...