- From: Pat Hayes <phayes@ai.uwf.edu>
- Date: Tue, 13 Nov 2001 12:03:55 -0600
- To: Sergey Melnik <melnik@db.stanford.edu>
- Cc: w3c-rdfcore-wg@w3.org
>Pat, > >thanks for a great "dump". I'm going to work it into the document almost >completely, if you don't mind. Sure, that's what I wrote it for. >I'm thinking of a running example that can be used to illustrate the >different proposals and modeling options. Good idea. >My current shot at it is: > >http://WWW-DB.Stanford.EDU/~melnik/rdf/datatyping/fig/motivating_example.gif > >It shows an interpretation, which can be encoded in many different ways, >e.g. as: OK, though I think we need to be careful about having the strings in the interpretation, since the X and P schemes probably won't have anything denoting those. Also, this can be described in several different ways even within a given datatyping-syntax option, so we need to be careful not to get confused with alternative ways of describing this structure in RDF. >_Robby ageMonthDecimal "12" >_Robby weightKgDecimal "14" >_Jenny weightKgOctal "14" >_Jenny ageYearsDecimal "1" > >in P(++) scheme. One possibility, though eg (In ascii-graph-art) _Robby ---weightKg--> "14" ---rdf:type--> xsd:decimal would be more in the P++ style, and _Robby weightKg "14" . weightKg rdfs:range xsd:decimal . more in the P style. >The advantage of starting with an interpretation instead of a piece of >syntax is that is it possible to refer to the different entities in the >domain of discourse directly and tell how the corresponding pieces of >syntax are mapped onto them (for example, "12" and "1" above are >interpreted as entity d1 in the figure). Ah, I see. That seems rather odd to me, I confess, as it assumes that durations are the value space of a datatyping scheme. I would have guessed that it was more likely that numbers - the n1-3 in your figure - would be in the literal value space, and that things like inYears and weightKg would be rdf properties. I guess the moral is that part of the 'model' must be what datatyping schemes are supposed to be in use. Pat -- --------------------------------------------------------------------- IHMC (850)434 8903 home 40 South Alcaniz St. (850)202 4416 office Pensacola, FL 32501 (850)202 4440 fax phayes@ai.uwf.edu http://www.coginst.uwf.edu/~phayes
Received on Tuesday, 13 November 2001 13:03:38 UTC