[rdfweb-dev] Proposal: foaf:owns property

[Leigh Dodds]

To keep everyone in the loop:

There was a flurry of discussion on this proposal just now in IRC, 
beginning at:

http://ilrt.org/discovery/chatlogs/foaf/2003-09-26.html#T15-06-54

Some more use cases:

Books I've purchased (e.g. as done at AllConsuming)
http://ilrt.org/discovery/chatlogs/foaf/2003-09-26.html#T15-27-12

Amazon recommendations
http://ilrt.org/discovery/chatlogs/foaf/2003-09-26.html#T15-34-18
(although Jim makes a good point that in that example the rating 
is the interesting bit). Also:
http://ilrt.org/discovery/chatlogs/foaf/2003-09-26.html#T15-37-12

Home insurance:
http://ilrt.org/discovery/chatlogs/foaf/2003-09-26.html#T15-37-56

Collectors (of stuff)
http://ilrt.org/discovery/chatlogs/foaf/2003-09-26.html#T15-42-11

"Find me a friend, who has a copy of this book I want to read"
http://ilrt.org/discovery/chatlogs/foaf/2003-09-26.html#T15-44-09

Cheers,

L.

> -----Original Message-----
> From: rdfweb-dev-bounces at vapours.rdfweb.org
> [mailto:rdfweb-dev-bounces at vapours.rdfweb.org]On Behalf Of Leigh Dodds
> Sent: 26 September 2003 15:30
> To: rdfweb
> Subject: [rdfweb-dev] Proposal: foaf:owns property
> 
> 
> 
> Summary:
> ========
> 
> We add a new property, foaf:owns, that can be used to indicate 
> that an agent owns something. Initial use cases are to list 
> a person's music and book collections.
> 
> This property was recently proposed on this list [1] and 
> briefly discussed [2] in the #foaf IRC channel.
> 
> Discussion
> ===========
> 
> I recently proposed the addition of a new property to 
> the FOAF namespace, foaf:owns, which would state that a 
> given foaf:agent "owns" some other resource. Similarly to foaf:knows, 
> the meaning of foaf:owns is deliberately general. I can therefore 
> state that I own a house, dog, or book. E.g.:
> 
> <foaf:Person>
>   <foaf:owns>
>     <wn:Dog><foaf:name>Rover</foaf:name></wn:Dog>
>   </foaf:owns>
>   <foaf:owns>
>     <wn:House/>
>   </foaf:owns>
> </foaf:Person>
> 
> Other examples at:
> 
> http://www.ldodds.com/tmp/ldodds-mb.rdf
> 
> Which is a FOAF document that states that I own two albums.
> 
> Inferences about what the ownership relationship will vary 
> according to the type of foaf:Agent and the type of resource being 
> owned.
> 
> There are many subtleties involved in modelling "ownership", complicated 
> by jurisdictional boundaries, whether the item is a "spatial thing" or 
> a "right". FOAF is not intended as a rights description language and 
> therefore this kind of detailed modelling belongs in another vocabulary.
> 
> However under the umbrella of creating "machine readable" homepages, 
> in which people often list their music and book collections, whether 
> they have any pets, etc., it seems worthwhile adding this general 
> property to the FOAF namespace.
> 
> Suggested Schema Changes
> ========================
> 
> Unless there are screams to the contrary, I suggest we add the following 
> to the FOAF schema:
> 
> <rdf:Property rdf:about="http://xmlns.com/foaf/0.1/owns" 
>               vs:term_status="unstable" rdfs:label="owns">
>   <rdfs:domain rdf:resource="http://xmlns.com/foaf/0.1/Agent"/>
>   <rdfs:range rdf:resource="http://www.w3.org/2000/01/rdf-schema#Resource"/>
>   <rdfs:isDefinedBy rdf:resource="http://xmlns.com/foaf/0.1/"/>
> </rdf:Property>
> 
> References
> ===========
> 
> [1]. http://rdfweb.org/pipermail/rdfweb-dev/2003-September/011920.html
> [2]. http://ilrt.org/discovery/chatlogs/foaf/2003-09-15.html#T21-58-55-1
> 
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