- From: Aaron Swartz <me@aaronsw.com>
- Date: Wed, 13 Mar 2002 17:59:57 -0600
- To: Ron Daniel <rdaniel@interwoven.com>
- CC: RDF Core <w3c-rdfcore-wg@w3.org>
On 2002-03-13 12:40 PM, "Ronald Daniel" <rdaniel@interwoven.com> wrote: > I took a quick look around but did not see any test cases or > usage scenarios around this issue. Here's a case (from PRISM > of course :-), where we have used '#'. Can you suggest how > this should be changed so as not to use it? Sure. <snip /> > <rdf:RDF xmlns:prism="http://prismstandard.org/namespaces/basic/1.0/" > xmlns:prl="http://prismstandard.org/namespaces/prl/1.0/" > xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" > xmlns:dc="http://purl.org/dc/elements/1.1/"> > <rdf:Description rdf:about="http://wanderlust.com/2000/08/Corfu.jpg"> > <dc:rights rdf:parseType="Resource" > > xml:base="http://prismstandard.org/vocabularies/1.0/usage.xml"> > <prl:usage rdf:resource="#none"/> > <prl:industry rdf:resource="http://prismstandard.org/vocabs/SIC/21"/> > </dc:rights> > </rdf:Description> > </rdf:RDF> Interesting that you use xml:base here. The solution to this one is pretty easy, since all your other namespaces are fine: [...] xml:base="http://prismstandard.org/vocabularies/1.0/usage/"> <prl:usage rdf:resource="none"/> [...] Or, if you don't want to create all those little files you can use special web server features like mod_redirect, or take advantange of CGI support: xml:base="http://prismstandard.org/vocabularies/1.0/"> <prl:usage rdf:resource="usage?e=none"/> or if your web server requires file name extensions: <prl:usage rdf:resource="usage.xml?e=none"/> This one is especially nice, because you can start out with just a plain html file named "usage" which defines all the appropriate terms, but when/if it grows too large, switch to a CGI/script/program which only shows the appropriate term. To make sure your server supported this, I visisted: http://www.idealliance.org/news/2002/idea0220b.asp?e=none And got the same result as; http://www.idealliance.org/news/2002/idea0220b.asp <snip/> > The #none is intended to identify one concept, which is defined in a file > along with a few other concepts around usage. The file's URL is > http://prismstandard.org/vocabularies/1.0/usage.xml. Hmm, I get a 404 at: http://prismstandard.org/vocabularies/1.0/usage.xml > That file is defined by PRISM and looks something like: > > <!-- usage.xml: Small vocabulary of usages for PRISM Rights Language --> > <rdf:RDF xmlns:pcv="http://prismstandard.org/namespaces/pcv/1.0/" > xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"> > <rdf:Description rdf:about=""> > > <pcv:Descriptor rdf:ID="none"> It looks like you're missing a line here... What's the relation between <> and <#none>? That aside, you could replace this as: <pcv:Descriptor rdf:about="none"> in the http://prismstandard.org/vocabularies/1.0/usage/ example. Or <pcv:Descriptor rdf:about="usage?e=none"> in a file named "http://prismstandard.org/vocabularies/1.0/usage" (or ".../usage.xml"). > How do you recommend users of the RDF spec define concepts in small > vocabularies (which may also be in RDF) and refer to them as the > value of an rdf:resource atttribute in RDF descriptions? There are lots of ways to do this, and I hope my examples here have helped. Please feel free to ask further questions. -- [ "Aaron Swartz" ; <mailto:me@aaronsw.com> ; <http://www.aaronsw.com/> ]
Received on Wednesday, 13 March 2002 19:00:01 UTC