Summing up, we have various ideas: * Negation via "NOT" or "!" (I agree with Julien that "!" is no really good solution) * Negation using "::-" and ":=-".
Besides beauty, there are important ramifications regarding semantics. Compare the following: 1) NOT [[located in::<q>[[Category:Country]] [[member of::EU]]</q>]] 2) [[located in::-<q>[[Category:Country]] [[member of::EU]]</q>]] Query (1) asks: "What is not located in a EU country?" (-> remove all things which are known to be in an EU country) Query (2) asks: "What is located in something that is no EU country?" (-> remove all things for which no located in relation besides those to EU countries exists) Each of the two cannot be expressed with the other syntax. You can say "[[foo::+]] NOT [[foo::bar]]" but this is not the same as "[[foo::-bar]]". The above example suggests that we want the "NOT" style of negation, and I think this is generally the case. The latter example also shows a downside of "NOT": it looks arkward as inner part of a query. For "!" one would write "[[foo::+]] ![[foo::bar]]" which seems clearer to me. What about "[[foo::+]] -[[foo::bar]]"? -- Markus On Monday 19 March 2007 12:06, Julien Tane wrote: > Hello, > > I don't think the sign '!' is a good choice... Here.. I think the > notation should rather be > <ask>NOT [[fruit::apple]]</ask> > > or something of the sort... for the sake of readibility... > > > J > > Markus Krötzsch wrote: > > On Wednesday 14 March 2007 18:58, Rich Mintz wrote: > >> Hello, > >> > >> I'm relatively new to this but learning quickly. > >> > >> Is there a way to select pages that *don't* match a condition, via an > >> "ask" query? > > > > Not yet. There was a patch that enabled this function for categories, but > > I would rather like a general implementation. What syntax should we use? > > > > Something like <ask>![[fruit::apple]]</ask> or <ask>![[fruit::+]]</ask>? > > Or is this too technical? Any ideas for a better negation syntax? > > > > -- Markus > > > >> I have a page like this: > >> > >> == Apples == > >> <ask>[[fruit::apple]]</ask> > >> == Bananas == > >> <ask>[[fruit::banana]]</ask> > >> == Oranges == > >> <ask>[[fruit::orange]]</ask> > >> == Neither Apple Nor Banana Nor Orange == > >> [what query can I put here?] > >> > >> What I am really looking for is pages for which "fruit" is not defined > >> -- but I'll settle for a more complicated negative query instead. > >> > >> -- Rich Mintz > >> > >> ------------------------------------------------------------------------ > >>- Take Surveys. Earn Cash. Influence the Future of IT > >> Join SourceForge.net's Techsay panel and you'll get the chance to share > >> your opinions on IT & business topics through brief surveys-and earn > >> cash > >> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDE > >>V _______________________________________________ > >> Semediawiki-user mailing list > >> [email protected] > >> https://lists.sourceforge.net/lists/listinfo/semediawiki-user > > > > ------------------------------------------------------------------------ > > > > ------------------------------------------------------------------------- > > Take Surveys. Earn Cash. Influence the Future of IT > > Join SourceForge.net's Techsay panel and you'll get the chance to share > > your opinions on IT & business topics through brief surveys-and earn cash > > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > > ------------------------------------------------------------------------ > > > > _______________________________________________ > > Semediawiki-user mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/semediawiki-user -- Markus Krötzsch Institute AIFB, University of Karlsruhe, D-76128 Karlsruhe [EMAIL PROTECTED] phone +49 (0)721 608 7362 www.aifb.uni-karlsruhe.de/WBS/ fax +49 (0)721 693 717
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