[foaf-dev] Re: updated FOAF spec

Axel Polleres axel.polleres at deri.org
Tue Jun 12 22:35:01 BST 2007

Shadi Abou-Zahra wrote:
> Hi Dan,
> Thanks again for providing a date-spaced version of FOAF and for 
> maturing many of the classes and properties to stable status. The ERT WG 
> has looked at this latest draft (FOAF 0.9, 24 May 2007) and we have a 
> few questions and request for clarifications:
> #1. Stability of essential FOAF properties
>  - The following FOAF properties are currently not marked as stable but 
> we regard them as crucial to identify resources such as foaf:Agent:
>   * foaf:mbox_sha1sum - I thought this was recommended over foaf:mbox in 
> one of the earlier FOAF specs.
>   * foaf:name and all its derivatives (foaf:firstName, foaf:givenname, 
> foaf:surname, foaf:family_name).
>  - What is the plan for stabilizing foaf:name and foaf_mbox_sha1sum? We 
> use these (especially foaf:name) to identify agents such as foaf:Person.
> #2. Definition and stability of foaf:homepage
>  - Currently foaf:homepage is marked as stable which is very helpful. 
> However, the range of this property is foaf:Document which in turn is 
> marked testing putting the stability in a kind of limbo. What is the 
> correct usage of this property to point to a home page of a person or 
> organization? We currently use foaf:homepage as follows in EARL 1.0: 
> <foaf:homepage rdf:resource="example.org"/>
>  - Also, foaf:homepage is defined as "A 'homepage' in this sense is a 
> public Web document". What is *public*? Can it be a password protected 
> resource or only available on an intranet?
> #3. Relationship to Wordnet and other vocabularies
>  - Several classes such as foaf:Agent or foaf:Person are subclasses of 
> Wordnet (or other vocabulary) terms. What is the stability of these 
> vocabularies and what impact on FOAF would changes in these external 
> vocabularies have?
>  - Note that there are no namespace documents associated with the 
> Wordnet terms. For example <http://xmlns.com/wordnet/1.6/Person> 
> generates a 404 message.

I think you point out a relevant issue here which is a general one.
What you critizise here is at the moment "only" covered in some best 
practices documents:


*Working Draft*, 14 March 2006

anybody hints about whether this will make it any further in the 
recommendation process and what is their timline? Seems to be stalled 
since over a yeat, but admittedly I didn't follow the best practices 
WG's activities...


> Note: the link to the previous version on the top of the page doesn't 
> work, it points back to the same version instead of the version of 14 
> January 2007:
>  - <http://xmlns.com/foaf/spec/20070114.html>
> Regards,
>   Shadi

Dr. Axel Polleres
email: axel at polleres.net  url: http://www.polleres.net/

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