I would disagree with that: relations serve a very important purpose in aggregating. In the case of your example, if you want to get a list of all the conferences that belong to a particular series, a query on relations is the easiest way to get that.
On 5/21/07, Sergey Chernyshev <[EMAIL PROTECTED]> wrote: > Yes, in this particular case it's true, but there are cases when page for an > object is not created yet or those pages might be in tons of different > categories and all that unites them is this particular relation. > It sort of kills the purpose of having relations versus just links if you > need to define type within object's article. > > > On 5/21/07, Yaron Koren <[EMAIL PROTECTED]> wrote: > > Since I got mentioned in this thread: I didn't mean for my previous > > email about inverse queries to be cryptic! Basically, it looks like > > the general pattern for inverse queries is: > > > > <ask>[[Page_name]][[Relation_or_attribute_name:=*]]</ask> > > > > (or '::', if it's an attribute) And you can include as many relations > > or attributes as you want. > > > > Since I'm already writing - yes, the best solution to this (if I > > understand the problem) is to label every page that defines a > > conference series with something like [[Category:Conference series]], > > and to embed that within a template. That way you get around the > > problem of finding distinct series, as well as the problem of finding > > series that don't yet have any specific conferences attached to them. > > I don't view such a solution as a hack at all - just good information > > architecture. > > > > -Yaron > > > > > > On 5/21/07, Sergey Chernyshev > > < [EMAIL PROTECTED]> wrote: > > > Yeh, I understand that I can hide stuff using templates, but uniqueness > is a > > > key here and the funny part that underlying infrastructure actually > support > > > it easily - just select from different column. > > > > > > I need this badly - I don't want to add data to the system just to > support a > > > query althought I might make sense to just have [[Category:Conference > > > Series]] in all conference series template or something. > > > > > > Sergey > > > > > > > > > > > > On 5/21/07, S Page <[EMAIL PROTECTED] > wrote: > > > > Sergey Chernyshev wrote: > > > > > In my techpresentations.org <http://techpresentations.org> wiki, I > have > > > > > conference page like "OSCON 2006" that have [[Series::OSCON]] > relations > > > > > to the conference series pages. > > > > > > > > > > Is there any way for me to select all objects of "Series" relation, > e.g. > > > > > "OSCON" without selecting subjects of those relations. I also need > to > > > > > have them unique (similar to DISTINCT in SQL). > > > > > > > > > > This can be easily done using regular RDF tools like Redland for > > > example. > > > > > > > > > > I can't find solution myself - any help will be appreciated! > > > > > > > > Subqueries provide a restricted list of objects to an inline query, > e.g. > > > > [[Series::*]][[Series::+]]<q>[[Blog:=+]]</q> > > > > will only show the pages with a Series relation whose object has a > Blog. > > > > > > > > BUT, I can't figure out how to get inline queries to just show the > > > > objects returned by the subquery. > > > > > > > > You can fake it by using templates in SMW 0.7 to hide the subjects. I > > > > made http://www.techpresentations.org/Test > > > > But you don't get uniqueness; you're still asking for "All pages that > > > > are the subject of a Series relation, and for each of these the object > > > > of its Series relation". > > > > > > > > However, Yaron Koren recently wrote in "Re: [SMW-devel] Reflexive > > > results?": > > > > > Well, my mistake - I tried it out, and it appears "inverse queries", > > > > > i.e. queries that return the object of triples, given the subject, > > > > > work. And it looks like the functionality has been in SMW for a > > > > > while... for some reason, it's not mentioned in the help page > > > > > (http://ontoworld.org/wiki/Help:Inline_queries ), > and I > > > couldn't see > > > > > documentation anywhere else either. Is this a secret or unsupported > > > > > feature? In any case, good to know. > > > > > > > > But he didn't say how he got it to work! > > > > > > > > > > > > Wei Dai posted a patch back on 2006-12-19, "[SMW-devel] patch: inline > > > > query for inverse relations and relation wildcard", I don't think > anyone > > > > tried it. > > > > > > > > -- > > > > =S Page > > > > > > > > > > > > ------------------------------------------------------------------------- > > > > This SF.net email is sponsored by DB2 Express > > > > Download DB2 Express C - the FREE version of DB2 express and take > > > > control of your XML. No limits. Just data. Click to get it now. > > > > http://sourceforge.net/powerbar/db2/ > > > > _______________________________________________ > > > > Semediawiki-user mailing list > > > > Semediawiki-user@lists.sourceforge.net > > > > > > > > https://lists.sourceforge.net/lists/listinfo/semediawiki-user > > > > > > > > > > > > > > ------------------------------------------------------------------------- > > > This SF.net email is sponsored by DB2 Express > > > Download DB2 Express C - the FREE version of DB2 express and take > > > control of your XML. No limits. Just data. Click to get it now. > > > http://sourceforge.net/powerbar/db2/ > > > _______________________________________________ > > > Semediawiki-user mailing list > > > Semediawiki-user@lists.sourceforge.net > > > > https://lists.sourceforge.net/lists/listinfo/semediawiki-user > > > > > > > > > > > ------------------------------------------------------------------------- > > This SF.net email is sponsored by DB2 Express > > Download DB2 Express C - the FREE version of DB2 express and take > > control of your XML. No limits. Just data. Click to get it now. > > http://sourceforge.net/powerbar/db2/ > > _______________________________________________ > > Semediawiki-user mailing list > > Semediawiki-user@lists.sourceforge.net > > > https://lists.sourceforge.net/lists/listinfo/semediawiki-user > > > > > ------------------------------------------------------------------------- > This SF.net email is sponsored by DB2 Express > Download DB2 Express C - the FREE version of DB2 express and take > control of your XML. No limits. Just data. Click to get it now. > http://sourceforge.net/powerbar/db2/ > _______________________________________________ > Semediawiki-user mailing list > Semediawiki-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/semediawiki-user > > ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Semediawiki-user mailing list Semediawiki-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/semediawiki-user
