RE: [xtm-wg] Equivalence between TM,RDF,Conceptual Graphs?

["Danny Ayers" <danny@panlanka.net>]

Hi Thomas,
Off at a tangent, but as you've been talking about equivalences between CG,
TM, RDF etc then I think you may be able to help me. I'm currently putting
together some (Java) code to expose the metadata of a RDBMS. I've more or
less figured out how to do this with RDF as the target - essentially
wrapping the DB in an OO facade, then mapping it across to (probably) the
Jena RDF API. I would also like to be able to provide a TM view, and the
obvious approach I suppose here would be to aim for XTM. Unfortunately I've
virtually no knowledge or experience in this field, so any suggestions or
just pointers to materials or whatever would be greatly appreciated.

Cheers,
Danny.

---
Danny Ayers
http://www.isacat.net

<- -----Original Message-----
<- From: Thomas B. Passin [mailto:tpassin@home.com]
<- Sent: 28 April 2001 21:03
<- To: xtm-wg@yahoogroups.com
<- Subject: [xtm-wg] Equivalence between TM,RDF,Conceptual Graphs?
<-
<-
<- I just resurrected a bit of work I did a while ago, and thought
<- it might be
<- interesting.  I looked at differences in the representation of a simple
<- property in Conceptual Graphs, RDF, and Topic Maps.  This was
<- before XTM, so
<- it uses ISO terminology.  I didn't include KIF, since Conceptual
<- Graphs and
<- KIF are inter-convertable and I find CGs much more readable.  The
<- representations are given both in natural language and in a simple,
<- semi-structured syntax.
<-
<- I'm inviting comments and thoughts relating to the equivalence or
<- non-equivalence of these representations, limitations, benefits,
<- and so on.
<- I won't make any  of my own here, to avoid making this post long and
<- unreadable.
<-
<- The example is this, in natural language:
<-
<- "Shoe #257 is red"
<-
<- 1)Conceptual Graphs
<-
<- "Shoe #257 has a property of type Color, whose value is Red."
<-
<- relation:{type:PROP,
<-    concept:{type:Shoe, val:#257},
<-    concept:{type:Color, val:Red}
<- }
<- =================================================
<- 2) RDF
<-
<- "#Shoe/257 has a property Color,
<- the value of which is red."
<-
<- description:{about:#Shoe/257, Color:Red}
<- =================================================
<- 3)Topic Maps (using facets)
<-
<- "The facet Color applies to the object
<- #tt-shoe-257, for which its value is Red."
<-
<- facet:{linktype:Color,fvalue:{facetval:Red, href:#tt-shoe-257}}
<- ==================================================
<- 4) Topic Maps (using occurrances)
<-
<- "There is a topic having id=tt-shoe-257,
<- which is a type of topic tt-shoe.  Information
<- describing its color occurs at http://standards.org/color/red."
<-
<- topic:{id:tt-shoe-257, types:tt-shoe,
<-    occurs:{occrl:ColorDescription, href:http://standards.org/color/red}
<- }
<-
<- (I didn't produce a representation using a TM association, would
<- anyone like
<- to do so?)
<-
<- Regards,
<-
<- Tom P
<-
<-
<-
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