Comments on: Why the triple needs to be a quint http://wwmm.ch.cam.ac.uk/blogs/murrayrust/?p=1016 A Scientist and the Web Sun, 22 Nov 2009 14:46:39 +0000 http://wordpress.org/?v=2.7.1 hourly 1 By: Egon Willighagen http://wwmm.ch.cam.ac.uk/blogs/murrayrust/?p=1016&cpage=1#comment-162708 Egon Willighagen Sun, 06 Apr 2008 09:16:53 +0000 http://wwmm.ch.cam.ac.uk/blogs/murrayrust/?p=1016#comment-162708 Ok, now with escaped <'s... <?xml version="1.0"?> <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:s="http://www.schemas.org/schema/"> <rdf:Description> <rdf:subject rdf:resource="http://www.cs.rpi.edu/~puninj/XMLJ/"/> <rdf:predicate rdf:resource="http://purl.org/dc/elements/1.1/creator"/> <rdf:object>John Punin</rdf:object> <rdf:type rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Statement"/> <s:attributedTo>Gerard Uffelman</s:attributedTo> </rdf:Description> </rdf:RDF> Ok, now with escaped &lt;’s…

<?xml version=”1.0″?>
<rdf:RDF xmlns:rdf=”http://www.w3.org/1999/02/22-rdf-syntax-ns#”
xmlns:dc=”http://purl.org/dc/elements/1.1/”
xmlns:s=”http://www.schemas.org/schema/”>
<rdf:Description>
<rdf:subject rdf:resource=”http://www.cs.rpi.edu/~puninj/XMLJ/”/>
<rdf:predicate rdf:resource=”http://purl.org/dc/elements/1.1/creator”/>
<rdf:object>John Punin</rdf:object>
<rdf:type rdf:resource=”http://www.w3.org/1999/02/22-rdf-syntax-ns#Statement”/>
<s:attributedTo>Gerard Uffelman</s:attributedTo>
</rdf:Description>
</rdf:RDF>

]]> By: Egon Willighagen http://wwmm.ch.cam.ac.uk/blogs/murrayrust/?p=1016&cpage=1#comment-162706 Egon Willighagen Sun, 06 Apr 2008 09:15:58 +0000 http://wwmm.ch.cam.ac.uk/blogs/murrayrust/?p=1016#comment-162706 Jim, I think those are indeed to two options. Topic Maps is more elegant in this matter, but the triple nature allows us to apply all the graph theory mathematics we have around. I just saw an example of reification: John Punin Gerard Uffelman at http://www.cs.rpi.edu/~puninj/XMLJ/classes/class8/all.html But using anynomous resources has the same effect, and thus not require to introduction of new RDF elements. (Though, they are there anyway...) I'm in the process of converting the BODR into RDF, and plan to use anonymous resources. I had in mind defining a new class, but this is obviously not needed, as shown in your example. Jim, I think those are indeed to two options. Topic Maps is more elegant in this matter, but the triple nature allows us to apply all the graph theory mathematics we have around. I just saw an example of reification:

John Punin

Gerard Uffelman

at http://www.cs.rpi.edu/~puninj/XMLJ/classes/class8/all.html

But using anynomous resources has the same effect, and thus not require to introduction of new RDF elements. (Though, they are there anyway…)

I’m in the process of converting the BODR into RDF, and plan to use anonymous resources. I had in mind defining a new class, but this is obviously not needed, as shown in your example.

]]> By: Jim Downing http://wwmm.ch.cam.ac.uk/blogs/murrayrust/?p=1016&cpage=1#comment-160746 Jim Downing Fri, 04 Apr 2008 08:08:20 +0000 http://wwmm.ch.cam.ac.uk/blogs/murrayrust/?p=1016#comment-160746 The vibe I've been picking up from people far more knowledgeable about these things is that reification is so last year. You can achieve the same effect using blank nodes (to which you'll probably want to assign some kind of URI, but that's another argument). :chris :madeAuthorshipAssertion [ :aboutBlog ; dc:author :pmr]. We're doing similar things with molecular data: :compoundX :hasMeltingPoint [ :value "234.5"; :units units:celsius; :measurementTechnique techniques:45; ....]. The vibe I’ve been picking up from people far more knowledgeable about these things is that reification is so last year. You can achieve the same effect using blank nodes (to which you’ll probably want to assign some kind of URI, but that’s another argument).

:chris :madeAuthorshipAssertion [ :aboutBlog ;
dc:author :pmr].

We’re doing similar things with molecular data:

:compoundX :hasMeltingPoint [ :value "234.5"; :units units:celsius; :measurementTechnique techniques:45; ....].

]]> By: Chris Rusbridge http://wwmm.ch.cam.ac.uk/blogs/murrayrust/?p=1016&cpage=1#comment-156805 Chris Rusbridge Tue, 01 Apr 2008 21:47:20 +0000 http://wwmm.ch.cam.ac.uk/blogs/murrayrust/?p=1016#comment-156805 I was sitting here tonight reading my Semantic Web primer (Antoniou and van Harmelen), and I read something that seemed to relate to this. Paraphrasing, they suggest that in RDF statements like "Chris believes that Peter is the author of this blog entry" can be achieved by "reification", which are needed because RDF only deals with triples. I think that means we turn the triple "Peter is the author of this blog entry" into a resource, which then becomes the object of the triple "Chris believes that [resource]". Looks clumsy but hey, multiplication seems like the name of the game in RDF. Just think about turning a decent database into triples! I was sitting here tonight reading my Semantic Web primer (Antoniou and van Harmelen), and I read something that seemed to relate to this. Paraphrasing, they suggest that in RDF statements like “Chris believes that Peter is the author of this blog entry” can be achieved by “reification”, which are needed because RDF only deals with triples. I think that means we turn the triple “Peter is the author of this blog entry” into a resource, which then becomes the object of the triple “Chris believes that [resource]“. Looks clumsy but hey, multiplication seems like the name of the game in RDF. Just think about turning a decent database into triples!

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