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RE: semantic problems?

From: Miles, AJ (Alistair) <A.J.Miles@rl.ac.uk>
Date: Wed, 20 Oct 2004 18:22:00 +0100
Message-ID: <350DC7048372D31197F200902773DF4C05E50CC4@exchange11.rl.ac.uk>
To: 'Leo Sauermann' <leo@gnowsis.com>, public-esw-thes@w3.org

... I've also thought of an Option (3), where you describe everything as in
Option (2) using your own vocab or e.g. Danny's project vocab, then you
declare every property you want to be rendered hierarchically as a
sub-property of skos:broader.  

So e.g. if you have:

ex:aProj	a	ex:Project;
			rdfs:label	'ISWC 2004 participation'.

ex:aSubProj		a	ex:Project;
				rdfs:label	'Travel to Japan';
				ex:subProjectOf	ex:aProj.

... then you declare additionally:

rdf:type 	rdfs:subPropertyOf		skos:broader.
ex:subProjectOf	rdfs:subPropertyOf		skos:broader.

Al.

> -----Original Message-----
> From: public-esw-thes-request@w3.org
> [mailto:public-esw-thes-request@w3.org]On Behalf Of Miles, AJ 
> (Alistair)
> 
> Sent: 18 October 2004 18:01
> To: 'Leo Sauermann'; public-esw-thes@w3.org
> Subject: RE: semantic problems?
> 
> 
> 
> Hi Leo,
> 
> I would do one of the following:
> 
> 
> * Option (1) - Pure SKOS
> 
> Do everything in just SKOS, and ignore the extended semantics 
> of a project
> hierarchy, i.e. ...
> 
> ex:Project	skos:prefLabel	'Projects'.
> 	
> ex:aProj	skos:prefLabel	'ISWC 2004 participation';
> 			skos:broader	ex:Project.
> 
> ex:aSubProj		skos:prefLabel	'Travel to Japan';
> 				skos:broader	ex:aProj.
> 
> 
> * Option (2) - Pure RDFS/OWL
> 
> Capture the semantics of the Project hierarchy by defining 
> some classes and
> properties, i.e. ...
> 
> ex:Project	a	rdfs:Class;
> 			rdfs:label	'Projects'.
> 
> ex:subProjectOf	a	rdf:Property;
> 					rdfs:label	
> 'sub-project of'.
> 					rdfs:domain		
> ex:Project;
> 					rdfs:range		
> ex:Project;
> 
> ... which you can then use to describe instance data, e.g. ...
> 
> ex:aProj	a	ex:Project;
> 			rdfs:label	'ISWC 2004 participation'.
> 
> ex:aSubProj		a	ex:Project;
> 				rdfs:label	'Travel to Japan';
> 				ex:subProjectOf	ex:aProj.
> 
> 
> Tradeoff between two options is convenience versus semantics.
> 
> Al.
> 
> --- 
> Alistair Miles 
> Research Associate 
> CCLRC - Rutherford Appleton Laboratory 
> Building R1 Room 1.60 
> Fermi Avenue 
> Chilton 
> Didcot 
> Oxfordshire OX11 0QX 
> United Kingdom 
> Email:        a.j.miles@rl.ac.uk 
> Tel: +44 (0)1235 445440 
> -----Original Message-----
> From: public-esw-thes-request@w3.org
> [mailto:public-esw-thes-request@w3.org]On Behalf Of Leo Sauermann
> Sent: 18 October 2004 16:57
> To: public-esw-thes@w3.org
> Subject: semantic problems?
> 
> 
> I have some semantical problems with how to write skos conceptSchemes.
> 
> my task:
> write a project management tool. Tool offers a concept of project and
> subprojects, the subprojects may be of different types. Possible
> subproject-types are "meeting" "milestone" "presentation" 
> "brainstorming"
> then I can also add resources to projects, these are "people" "tools"
> so a project contains subprojects and resources
> 
> now I have project instances like 
> "project ISWC 2004" -preparing a paper
> "project gnowsis" -  open source framework i develop
> "project world takeover" - take over the world
> 
> my problems:
> I made the error of rdfs:subClassing the project of skos:concept :-)
> gno:project rdfs:subClassOf skos:Concept
> - that's bogus?
> 
> When I make "project instances" - how to i determine for which project
> instance which concepts are now possible and how do i link them?
> so for example, when i make a new project "X", the Concept of 
> the project
> may have some default structure, or when the user wants to 
> add sub-projects,
> how would they be related etc....
> 
> X skos:broaderInstantive gno:project.
> X skos:prefLabel "ISWC 2004 participation"
> X  skos:narrowerPartitive SubX
> SubX skos:broaderInstantive gno:TravelSubproject
> SubX  skos:prefLabel "travel to japan"
> 
> is this "right" ???
> 
> cheers
> Leo
> (examples would help, see my other post)
> 
Received on Wednesday, 20 October 2004 17:22:39 UTC

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