- From: Yosi Scharf <syosi@MIT.EDU>
- Date: Mon, 12 Jul 2004 16:42:07 -0400
- To: public-cwm-bugs@w3.org
- Cc: connolly@w3.org, timbl@w3.org
It was confirmed at a meeting that this is a result of cwm's conversion
of rdf lists to lists. Timbl said that this is ok, because it does not
manifest itself to n3 files. Further, treating lists as lists make many
things in cwm possible / easier.
Perhaps it had no effect on n3 files, but only until until now.
see http://lists.w3.org/Archives/Public/public-cwm-talk/2004JulSep/0005.html
He was trying to simply return a list of his results. Take a look at the
following, a very minor modification to the query file given there:
@prefix ex: <http://example.org/ex#>.
@prefix q: <http://www.w3.org/2004/ql#>.
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
#@prefix rdf: <http://www.example.com/rdf#> .
[] q:select {[ rdf:first ?x;
rdf:rest [ rdf:first ?y; rdf:rest rdf:nil]] };
q:where { ?x a ex:Librarian; ex:hairColor ?y }.
if we run ../../cwm.py rdql_data1.n3 --think -query=rdql_query1.n3
we get nothing. Now change thr rdf: prefix so the first choice is
commented out, and rdf:first has no meaning. Now the query works, returning
#Processed by Id: cwm.py,v 1.156 2004/07/06 18:04:18 syosi Exp
# using base
file:/home/syosi/CVS-local/WWW/2000/10/swap/test/includes/rdql_data1.n3
# Notation3 generation by
# notation3.py,v 1.158 2004/07/06 18:04:19 syosi Exp
# Base was:
file:/home/syosi/CVS-local/WWW/2000/10/swap/test/includes/rdql_data1.n3
@prefix : <http://www.example.com/rdf#> .
@prefix ex: <http://example.org/ex#> .
[ :first ex:Joe;
:rest [
:first "black";
:rest :nil ] ].
[ :first ex:Mary;
:rest [
:first "red";
:rest :nil ] ].
#ENDS
Yosi
Received on Monday, 12 July 2004 16:42:11 UTC