- From: Roger L. Costello <costello@mitre.org>
- Date: Tue, 22 Apr 2003 08:11:33 -0400
- To: www-rdf-interest@w3.org
- CC: "Costello,Roger L." <costello@mitre.org>
Thanks Dan. You make excellent points. I will revise slide002. I believe that 75-300mm zoom means that the lens has a continuous range of focal-lengths from 75mm to 300mm (i.e., not discrete values). /Roger Dan Brickley wrote: > > One quick review comment: > > (jumping straight to the nitpicking!) > > re http://www.xfront.com/owl-quick-intro/sld002.htm > > Slide 2 is a little inaccurate in it's first bullet, in that you ascribe > to OWL characteristics that belong to the broader RDF approach. Specifically, > RDF is concerned with the instance level and with logical relations, OWL > provides supporting machinery for making richer generalisations, eg. > criteria for class membership, relationships amongst classes etc. It's a > bit confusing to describe OWL solely as 'an XML vocabulary' since it doesn't > really work in standalone fashion; it's part of the broader framework we > began with the RDF syntax, graph data model and schema language, and which > we may continue with work on rules, query etc etc. > > Perhaps: > > (thrown to the mailing list for discussion, shredding etc :) > > * OWL is an RDF/XML vocabulary for describing the kinds of categories > and logical relationships used in RDF/XML data exchange on the Web. > > * OWL extends the Resource Description Framework by providing some > formally-defined mechanisms for stating generalisations on the Web. > > - A collection of definitions for a domain is called an "Ontology" > > ... > > This costs you an extra bullet point and acronym, but perhaps things could be > compacted. I think introducing OWL as if it sat directly atop XML without > RDF being acknowledged as a named architectural component is an approach > worth considering, as is the approach of calling all of this stuff 'RDF'. > Currently the specs use 'RDF' for the basic graph approach and syntax, and > 'OWL' for the Ontology layer. It's probably best if OWL and RDF intros > followed the specs in this, although I welcome discussion on > www-rdf-interest as to whether this acronym soup could be better > presented to users... > > Another technical question re slide 20: > http://www.xfront.com/owl-quick-intro/sld020.htm re "a camera with a > 75-300mm zoom lens", is that supposed to indicate a discrete value, or do > zoom lenses take values such as 75mm, 200mm etc? > > Something of an aside that I might announce properly when more polished, > but which relates somewhat to your device-description use case, I spent > some time today working with some UAProf / CC/PP device descriptions in RDF, > working notes on which can be found at > http://esw.w3.org/topic/UAProfIndex in the ESW wiki. I harvested device > descriptions from http://w3development.de/rdf/uaprof_repository/ and loaded > them into an RDF store, trying queries such as > [[ > SELECT ?model, ?vendor, ?size, ?doescolor, ?doesimages, ?doestextin, ?hwp, > WHERE > (prf::Model ?hwp ?model) > (prf::Vendor ?hwp ?vendor) > (prf::ScreenSize ?hwp ?size) > (prf::ColorCapable ?hwp ?doescolor) > (prf::ImageCapable ?hwp ?doesimages) > (prf::TextInputCapable ?hwp ?doestextin) > USING > prf for http://www.wapforum.org/profiles/UAPROF/ccppschema-20010430# > ]] > > ...this is more for mobile phones than cameras, but I suspect > http://www.w3.org/TR/di-princ/ and nearby might be of interest. After I > built an aggregation of these descriptions the first thought I had was > that with a bit more additional metadata they'd be quite good for > building an online store, eg. 'find me something with such'n'so > capabilities, color, screensize etc of type s:CameraPhone that works in > the UK and costs less that 200ukp... > > Dan
Received on Tuesday, 22 April 2003 08:11:40 UTC