q's related to publishing RDF Vocabularies

I have a couple related questions, on publishing a new RDF vocabulary - 

1) What is the correct procedure for subclassing an existing vocabulary that I 
don't maintain?    For example, in the annotea schema,
	 http://www.w3.org/2000/10/annotation-ns 
"The 'related' property is expected to be subclassed by more specific 
relationships." - and I'd like to create some subclasses, such as
	isLocalizationOf
	isPersonalizationOf
	isExampleOf
	implements
	followsUpOn
	corroboratedBy
	contradictedBy

But, I'm not sure how to go about subclassing a property if I don't maintain 
the namespace? I'd rather build on the existing wherever possible, it would 
seem just much better practice, no?

2) I know I've asked before, but do we have anything equivalent to 
http://Freshmeat.net for rating, commenting on, discovering by searching 
human readable text, etc on vocabularies?  Mike Hausenblas gave me a good 
list of sites - 
	[1] http://olp.dfki.de/ontoselect/
[2] http://www.schemaweb.info/
[3] http://www.sindice.com/
[4] http://pingthesemanticweb.com/
[5] http://swoogle.umbc.edu/
[6]
http://esw.w3.org/topic/TaskForces/CommunityProjects/LinkingOpenData/Sem
anticWebSearchEngines

and I've spent several hours searching around on them, but it seems to me that 
for an initial search of the type 'Has anyone already done what I'm thinking 
of?', a human-annotated and human-ranked list of vocabularies would be more 
useful.  Anyway after my bit of clumsy searching around, I didn't find what I 
wanted - a vocabulary for grassroots annotations of URLs - but later browsing 
on the microformats site I came across TDL, the Thread Description Language 
that has respondsTo, respondsPositivelyTo and respondsNegativelyTo.  I 
wouldn't have guessed those terms, but they make sense after seeing them.  
Still, I'd like to know how widely used they are before adopting for my 
purposes.
	
I guess what I'm getting at, is I see a need for human-readable comments, 
ratings, and discussion of vocabularies organized by category, and I haven't 
yet found it.  Does anyone else feel the same, or did I just miss something 
when looking around?

3)  While I'm bothering folks, does anyone else have a suggestion for a 
grassroots annotation vocab in additon to these three I'm looking at now?  I 
am planning to use 

Danny Ayers and Tom Heath's Review vocabulary at 
http://danja.talis.com/xmlns/rev_2007-11-09/index.html

Annotea
http://www.w3.org/2000/10/annotation-ns#

and possibly TDL
http://www.schemaweb.info/schema/SchemaDetails.aspx?id=199

The idea is to record annotations and assertions that may not be reviews or 
ratings, and to let users make assertions about two URI's they may not have 
created.   May need terms such as (listed above)

	isLocalizationOf
	isPersonalizationOf
	isExampleOf
	implements
	hasFollowUp
	corroboratedBy
	contradictedBy

and also perhaps

	isResponsibleFor
	inspiredBy
	hasAnecdotalEvidence / hasPersonalAccount
	hasFirsthandAccount
	hasSecondhandAccount
 
which brings up another thing - best practices for reification especially when 
making non-authoritative assertions about two things I don't own.  But that's 
another email.

Thanks for any clue!

--Golda

-- 
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Golda Velez	520-440-1420		http://goldavelez.com
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