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Re: Prefix for http://purl.org/dc/elements/1.1/ in RDFa Initial Context?

From: Ivan Herman <ivan@w3.org>
Date: Fri, 1 Mar 2013 18:00:30 +0100
Cc: Dan Brickley <danbri@danbri.org>, Manu Sporny <msporny@digitalbazaar.com>, Gregg Kellogg <gregg@greggkellogg.net>, Thomas Baker <tom@tombaker.org>, "W3C RDFa WG" <public-rdfa-wg@w3.org>
Message-Id: <E43E63E7-7058-44CE-9531-7BD730510B6A@w3.org>
To: Antoine Isaac <aisaac@few.vu.nl>

On Mar 1, 2013, at 17:59 , Antoine Isaac <aisaac@few.vu.nl> wrote:

> Thanks for the catch and the follow up!
> 
> In fact I thought this was already part of the document. It's several weeks since I see the W3C pyRDFa parser spitting out RDF from my RDFa and minting the dc11 namespace abbreviation in the process. But maybe I'm interpreting signs in a too optimistic way :-)

Yeah, my implementation recognizes that one alrady. But it is not really really kosher yet:-)

Ivan

> 
> Antoine
> 
> 
> 
>> Good point. We made the commitment not to change the context file often, so I did not make a change yet. Manu, should we introduce this change now and make it official? Are there other additions that we may want to consider?
>> 
>> If we change this, we will have to make some tam-tam around it; implementers should be notified.
>> 
>> (Eg, two W3C Recs are coming up, namely prov and sparql, both have some vocabulary additions; those may be added right away, ie, as soon as PR is up)
>> 
>> Ivan
>> 
>> 
>> On Mar 1, 2013, at 17:11 , Dan Brickley<danbri@danbri.org>  wrote:
>> 
>>> +cc Antoine
>>> 
>>> Where are we with this? Do you still plan to add dc11 expansion into
>>> http://www.w3.org/2011/rdfa-context/rdfa-1.1 ?
>>> 
>>> Dan
>>> 
>>> On 20 November 2012 21:37, Ivan Herman<ivan@w3.org>  wrote:
>>>> I am fine with this change.
>>>> 
>>>> WG: process question. If we accept this change, when should we do this? We are bound by a promise not to make changes often. I would therefore propose to make this change when html5+rdfa goes to CR. Tom, this would be sometimes January-February time range. Would that be fine?
>>>> 
>>>> Ivan
>>>> 
>>>> 
>>>> 
>>>> 
>>>> On Nov 20, 2012, at 16:28 , Gregg Kellogg wrote:
>>>> 
>>>>> ΩOn Nov 20, 2012, at 4:24 PM, Thomas Baker<tom@tombaker.org>  wrote:
>>>>> 
>>>>>> Dear RDFa WG,
>>>>>> 
>>>>>> Currently, the prefixes "dc:" and "dcterms:" are both mapped in the RDFa
>>>>>> Initial Context to the namespace URI http://purl.org/dc/terms/ (here:
>>>>>> "/terms/") [1].
>>>>>> 
>>>>>> It has been pointed out that a considerable amount of data uses, or maps to,
>>>>>> DCMI properties with the namespace URI http://purl.org/dc/elements/1.1/ (here:
>>>>>> "/1.1/"), which in other contexts has traditionally been mapped to the prefix
>>>>>> "dc:".
>>>>>> 
>>>>>> Most of the /terms/ properties have ranges restricted to either literal or
>>>>>> non-literal values, while the /1.1/ properties are rangeless (rdfs:Resource by
>>>>>> default) -- a characteristic some users see as an advantage (see [2]).
>>>>>> 
>>>>>> DCMI would like to propose to the RDFa Working Group that the prefix "dc11:" be
>>>>>> added to the Initial Context for the /1.1/ namespace URI.
>>>>> 
>>>>> +1
>>>>> 
>>>>> Gregg
>>>>> 
>>>>>> People who have used "dc:" for /1.1/ properties will need to explicitly declare
>>>>>> this as a prefix.  However, for those who continue to use /1.1/ properties --
>>>>>> in some cases, precisely because they are rangeless -- inclusion in the Initial
>>>>>> Context would emphasize that /1.1/ has not been forgotten or deprecated,
>>>>>> reinforce the message that /1.1/ properties should not be "upgraded" to /terms/
>>>>>> properties in a mechanical way, and provide a conventional prefix to use for
>>>>>> the properties.
>>>>>> 
>>>>>> Many thanks for your consideration,
>>>>>> Tom
>>>>>> 
>>>>>> [1] http://www.w3.org/2011/rdfa-context/rdfa-1.1
>>>>>> [2] http://wiki.dublincore.org/index.php/FAQ/DC_and_DCTERMS_Namespaces
>>>>>> 
>>>>>> --
>>>>>> Tom Baker<tom@tombaker.org>
>>>>>> Dublin Core Metadata Initiative Ltd
>>>>>> 
>>>>>> 
>>>>> 
>>>> 
>>>> 
>>>> ----
>>>> Ivan Herman, W3C Semantic Web Activity Lead
>>>> Home: http://www.w3.org/People/Ivan/
>>>> mobile: +31-641044153
>>>> FOAF: http://www.ivan-herman.net/foaf.rdf
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>> 
>> 
>> ----
>> Ivan Herman, W3C Semantic Web Activity Lead
>> Home: http://www.w3.org/People/Ivan/
>> mobile: +31-641044153
>> FOAF: http://www.ivan-herman.net/foaf.rdf
>> 
>> 
>> 
>> 
>> 
>> 
> 


----
Ivan Herman, W3C Semantic Web Activity Lead
Home: http://www.w3.org/People/Ivan/
mobile: +31-641044153
FOAF: http://www.ivan-herman.net/foaf.rdf
Received on Friday, 1 March 2013 17:00:58 UTC

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