W3C home > Mailing lists > Public > public-media-annotation@w3.org > June 2010

Re: Media Ontology namespace and location

From: Thierry MICHEL <tmichel@w3.org>
Date: Mon, 07 Jun 2010 14:42:02 +0200
Message-ID: <4C0CE91A.7040004@w3.org>
To: raphael.troncy@eurecom.fr
CC: Media Annotation <public-media-annotation@w3.org>
RaphaŽl Troncy wrote:
> Dear all,
> I have been able to locate the Media Ontology drafts at:
>  - http://www.salzburgresearch.at/~tbuerger/ma-ont.rdfs (original RDFS 
> version)
>  - http://www.ebu.ch/metadata/ontologies/W3C_MAWG/ma-ont-rev.rdfs.xml 
> (revised RDFS version)
>  - http://www.salzburgresearch.at/~tbuerger/ma-ont.owl (original OWL 
> version).
> Why not checking in these files in a single obvious location that is the 
> Media Annotations WG web space, e.g. in 
> http://www.w3.org/2008/WebVideo/Annotations/ontology/ ?
> I wanted to do that myself, but I just realize how messy was this CVS 
> web directory, with many duplicate folders. Who is doing some cleanup 
> and administration here ?
> Further, the namespace of the Media Ontology seems to be: 
> http://www.w3.org/ns/ma-ont#. Is this the final namespace? I observe it 
> is inconsistent with the usual non-written W3C policy where namespaces 
> tend to include dates (see e.g. OWL, RDF, RDFS, SKOS, etc.). It is also 
> largely inconsistent with community practice from the Web of Data 
> community. I wonder how much the choice of the namespace has been 
> discussed?

I was not present during the discussion of the Media Annotation 
namespace, but the current name space
http://www.w3.org/ns/ma-ont  mentioned in the ontology dratf
  is coherent with the "Namespace URIs in Recommendation Track 
Documents" [1]

Director approval is NOT REQUIRED when a namespace URI in a Technical 
Report has any of the following forms:

     * http://www.w3.org/ns/ssss
     * http://www.w3.org/YYYY/MM/ssss
     * http://www.w3.org/YYYY/ssss


     * ns is the literal string "ns"
     * YYYY and MM are decimal digits corresponding to the year and 
month of URI allocation
     * ssss is a short string not causing confusion, alarm, or 
embarrassment. For instance, the short string should not cause confusion 
when used in both http://www.w3.org/TR/ssss and 
http://www.w3.org/ns/ssss URIs.

But use of syntax such as
enables the W3C support staff to ensure very high level of persistence 
for namespace URIs, in terms of the non-reuse and the availability of 
any online materials (schemata etc).

[1] http://www.w3.org/2005/07/13-nsuri

> I would like to point out the importance of this issue. Remember the 
> SKOS history, that has debated for many weeks the change of its 
> namespace but couldn't since too many applications relying on the old 
> one would have been broken! I'm already using the ma-ont namespace in my 
> application, so take a decision sooner than later!
> Thanks.
>   RaphaŽl
Received on Monday, 7 June 2010 12:42:56 UTC

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