NLP with Prolog

A book!  Online! Suitable for working through.

Marelle: sysadmin in Prolog

Marelle allows you to declare packages and dependencies, then derive (and execute) the steps needed to install a given package. Very interesting.

XSB Prolog

XSB is an open-source, tabled (i.e. memoized) Prolog. It has a Perl binding. It would be interesting to pursue. Very interesting, actually.

NLP in Prolog in IBM's Watson

Here. Drooling.

Great presentation of Prolog

Gotta implement this one day. Article on kuro5hin.

Leading to Learn Prolog Now.

And to XSB (also from Perl).

Also, SWI-Prolog. And Building Expert Systems in Prolog.

I'd much rather have some really core stuff available in pure Perl that "does Prolog" - with the option to offload a large system into actual Prolog as necessary.

Update March 9, 2011: Kind of like AI::Prolog, for example. Oh, CPAN, is there nothing you can't find for me? Ah, yes, grist for the AI::Declarative mill....