dcat exit criteria - dcat namespace only?

For org, and some previous vocabularies, the "CR Exit Criteria" has been 
that each term needs to be used by two or more data sources. But I'm 
thinking dcat is a bit different in that it heavily reuses some other 
vocabularies, especially Dublin Core, which are not under W3C control.   
As such, I think it might make more sense to only require evidence that 
each term IN THE DCAT NAMESPACE is used by two or more data sources.   
(And of course, not the deprecated terms.)

That is, just the 16 terms [1]:

dcat:Catalog
dcat:themeTaxonomy
dcat:dataset
dcat:record
dcat:CatalogRecord
dcat:Dataset
dcat:theme
dcat:keyword
dcat:contactPoint
dcat:distribution
dcat:landingPage
dcat:Distribution
dcat:accessURL
dcat:downloadURL
dcat:byteSize
dcat:mediaType

It seems to me nearly all of these will be used by nearly everyone using 
dcat.   The only kind of odd ones are theme/themeTaxonomy and accessURL.

So, I'm no dcat expert.   Am I right?   Does it seem like the main thing 
we need to prove is that these 16 terms are useful?     Does it seem 
likely they will be?    (looking at 
http://www.w3.org/2011/gld/wiki/DCAT_Implementations I'm not so sure....)

           -- Sandro

[1] I pulled these out of the namespace document with

    egrep "a rdfs:Class|a rdf:Pr|Deprecated" dcat.ttl .

There doesn't seem to be any easy list.