[foaf-dev] Re: updated FOAF spec

Shadi Abou-Zahra shadi at w3.org
Mon Jun 11 15:21:45 BST 2007

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.

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>


Shadi Abou-Zahra     Web Accessibility Specialist for Europe |
Chair & Staff Contact for the Evaluation and Repair Tools WG |
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