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Re: euler state of the art? (euler.yap log:semantics and port numbers)

From: Dan Connolly <connolly@w3.org>
Date: Mon, 06 Nov 2006 17:17:40 -0600
To: jos.deroo@agfa.com
Cc: www-archive@w3.org
Message-Id: <1162855060.8279.315.camel@dirk>

On Mon, 2006-11-06 at 21:48 +0100, jos.deroo@agfa.com wrote:
> Dan Connolly wrote:
> > On Mon, 2006-11-06 at 18:52 +0100, jos.deroo@agfa.com wrote:
> > > 
> > > The euler5 prolog version is best run as RESTfull webservice
> > > (see again http://eulersharp.sourceforge.net/README)
> > > as it needs the euler1 java version to do the N3->YAP 
> >
> > OK, I got Yapp installed, and I'm working on the Codd stuff...
> > One quick question while I'm at it: what about built-ins
> > that call out to the Web, like log:semantics? Should
> > I expect that to work in this java/prolog/REST setup?
> 
> That should work fine (but was quite complicated to
> implement as we have to call back euler1 with the
> correct namespace prefixes).

Hmm... the port number seems to be implicitly hardcoded
in euler.yap,v 1.103 2006/11/04 17:46:40 :

'log:semantics'(X,Y,_):- ground(X), fact('log:semantics'(X,Y,_)), !.
'log:semantics'(X,Y,_):- ground(X), sub_atom(X,1,_,1,U), nsp(W),
  atom_concat('http://localhost/.euler+-pterm
+','http://localhost/.context%2B',C1), atom_concat(C1,W,C2),
atom_concat(C2,'+',C3), atom_concat(C3,U,V),
  url_info(V,http(H,P,D)), fetch_url(http(H,P,D),['Host'(H)],R),
lists:member(content(C),R), content(C,Z), read_from_chars(Z,Y),
assert(fact('log:semantics'(X,Y,_))).

-- 
Dan Connolly, W3C http://www.w3.org/People/Connolly/
D3C2 887B 0F92 6005 C541  0875 0F91 96DE 6E52 C29E
Received on Monday, 6 November 2006 23:17:52 GMT

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