- From: Yosi Scharf <syosi@MIT.EDU>
- Date: Fri, 12 Oct 2007 11:09:02 -0400
- To: "Sean B. Palmer" <sean@miscoranda.com>
- CC: public-cwm-bugs@w3.org
Sean B. Palmer wrote: > I think I've found a problem with handling lists. I can get the last > element of a list using list:last (whose documentation is wrong; see > the bottom of this email for details), but I can't get the sublist > that the last element is the rdf:first of: > > > You need to tell cwm which of the infinite number of lists you want. Like this: @prefix : <http://example.org/test#> . @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . @prefix list: <http://www.w3.org/2000/10/swap/list#> . @prefix string: <http://www.w3.org/2000/10/swap/string#> . { ?LIST a :TestList; list:last ?LAST } => { ?LIST :last ?LAST } . {?LIST a :TestList} => {?LIST a :SubList} . {?LIST a :SubList; rdf:rest ?SUBLIST} => {?SUBLIST a :SubList} . { ?LIST a :TestList; list:last ?LAST . ?SUBLIST a :SubList; rdf:first ?LAST } => { ?LIST :lastList ?SUBLIST } . ([ :p :q ] [ :r :s ]) a :TestList . > #ENDS > > Also, the documentation for the list:last builtin is wrong: > > last Iff the object is a list and the subject is the last thing that > list, then this is true. The last element can be calculated as a > function of the list. > - http://www.w3.org/2000/10/swap/doc/CwmBuiltins > > It's actually the other way around; the subject is the list, and the > object is the last thing in that list. Please fix the description! > > Thanks, > > I've checked in that fix. Yosi
Received on Friday, 12 October 2007 15:24:52 UTC