[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: A certain difficulty
Mark Birbeck <Mark.Birbeck@i...> writes: > Hopefully my example shows that I'm coming at this from the other > side; *my* creator might be "everyone who has designed a building" > whilst *my mum's* creator is "everyone who has knitted a jumper". That's only because you're loading too much meaning into the property and forgetting about the class of the object it's attached to (Dublin Core is guilty of the same thing). > Of course we could say everyone must use "dc:Creator", but then how > do I find everyone who ever knitted a jumper? Well of course I go to > the knitting site that has used RDF to refer to subsets of other > data, because they have a class called "Knitter". Take a look at the class. Consider the following: <rdf:RDF ...> <megg:Jumper rdf:about="http://www.foo.com/1"> <dc:creator rdf:about="http://www.people.org/a"/> </megg:Jumper> <megg:Book rdf:about="http://www.amazon.com/ids/00002"> <dc:creator rdf:about="http://www.people.org/b"/> </megg:Book> </rdf:RDF> If you want to find every knitter but not every author, then simply look only for dc:creator properties attached to an object of class megg:Jumper. The alternative is to create an endless stream of new properties create sweaterCreator bookCreator carCreator webPageCreator cartoonCreator flyingSaucerCreator emailCreator badSmellCreator etc. Of course, you have no choice but to do this kind of thing when you're using flat HTML <meta> tags, but RDF was designed specifically to allow you to apply modern OO techniques to the problem. All the best, David -- David Megginson david@m... http://www.megginson.com/ *************************************************************************** This is xml-dev, the mailing list for XML developers. To unsubscribe, mailto:majordomo@x...&BODY=unsubscribe%20xml-dev List archives are available at http://xml.org/archives/xml-dev/threads.html ***************************************************************************
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