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DC-ARCHITECTURE  March 2012

DC-ARCHITECTURE March 2012

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Subject:

Re: Schema.org Task Group - issue tracking - Doodle poll

From:

"Young,Jeff (OR)" <[log in to unmask]>

Reply-To:

DCMI Architecture Forum <[log in to unmask]>

Date:

Fri, 9 Mar 2012 12:31:14 -0500

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text/plain

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Regarding dcterms:creator/schema:author, there is a use case that I'm struggling with related to authority control. Here's how I currently have it modeled: 
 
<http://www.worldcat.org/oclc/673595> a scheme:Book; 
	schema:name "Zen and the art of motorcycle maintenance: an inquiry into values" ; 
	schema:author <http://viaf.org/viaf/78757182> . 
 
<http://viaf.org/viaf/78757182> a schema:Person ; 
	schema:name "Pirsig, Robert M."; 
	madsrdf:isIdentifiedByAuthority <http://id.loc.gov/authorities/names/n83231586> . 
 
<http://id.loc.gov/authorities/names/n83231586> a skos:Concept ; 
	skos:inScheme <http://id.loc.gov/authorities/names> . 
 
The same issue exists for dcterms:subject/schema:about as well as several others. 
 
I'm not keen on using madsrdf:isIdentifiedByAuthority, but there is no inverse property for foaf:focus (or anything remotely similar in the schema.org vocabulary. I realize that "authority control" is probably beyond the interest of the schema.org vocabulary, but still I would like to reuse as much as possible. 
 
Jeff 
 
> -----Original Message----- 
> From: DCMI Architecture Forum [mailto:[log in to unmask]] 
> On Behalf Of Dan Brickley 
> Sent: Friday, March 09, 2012 10:31 AM 
> To: [log in to unmask] 
> Subject: Re: Schema.org Task Group - issue tracking - Doodle poll 
>  
> On 9 March 2012 16:15, Thomas Baker <[log in to unmask]> wrote: 
> > Dear all, 
> > 
> > The process of finalizing a set of mappings from DCMI Metadata Terms 
> to 
> > Schema.org has been stalled.  I have been the bottleneck for this, 
> inasmuch I 
> > strongly feel we should have a well-functioning issue tracking and 
> publication 
> > workflow in place before taking final decisions on the mappings 
> themselves.  We 
> > decided in January to use the issue tracker of Git, but I haven't 
> found the 
> > time to get my head around how this would work in practice. 
> > 
> > Specifically, we need a way to collect issues about individual 
> mappings in a 
> > structured way without trying to do this on the dc-architecture list. 
>  After 
> > we decide on the mappings, we need a way to collect comments from the 
> public 
> > in a structured way so that we can mark mappings for reconsideration 
> in light 
> > of better understanding. 
> > 
> > Thanks to Jon, I have set up a Github account for DCMI [1], which Kai 
> and Corey 
> > have graciously volunteered to help maintain.  Thanks to Jon again, 
> the draft 
> > mappings have been published in Git as well as on the wiki [2]. 
> > 
> > Corey has offered to lead the way on using Git for issue tracking by 
> entering 
> > some into [1] and explaining how our use of the tracker will work.  I 
> have several 
> > issues of detail with the mappings, but here is one to get us 
> started: 
> > 
> >    Proposed: 
> >        schema:about owl:equivalentProperty dct:subject 
> >    Tom says: 
> >        The relation should be subPropertyOf because the domain of 
> schema:about is more restricted. 
>  
> I think that one's reasonable. I don't know of anyone yet using 
> schema.org's 'about' with string values e.g. subject classification 
> codes. Or links to SKOS concepts. The main use it to point to a 
> 'thing'. So if a travel guide is 'about' Paris, and we have a URI for 
> Paris, it would link to that. Or if a movie is 'about' a Person, the 
> value might be an embedded description of that person. This does 
> correspond to one of the two main uses of dc's  'subject'. At 
> schema.org we're pretty flexible so having string and 
> indirected-via-SKOS-concept values is probably OK too. 
>  
> Re domain, ... was a domain ever declared for dc terms properties? if 
> not, then yes, subproperty sounds about right. 
>  
> Where is a good place to collect concrete examples? 
>  
> Over in W3C wiki I just got an extension added so we can post markup 
> examples there, in case that's useful. See the proposals tracker for 
> http://www.w3.org/wiki/WebSchemas -> 
> http://www.w3.org/wiki/WebSchemas/SchemaDotOrgProposals 
> e.g. http://www.w3.org/wiki/WebSchemas/Singularity shows some markup 
> examples. If useful, feel free to put notes under WebSchemas/ area of 
> that wiki... 
>  
> cheers, 
>  
> Dan 
>  
>  
>  
> > I have posted a Doodle poll at [3] to find a time in early April for 
> a call, 
> > by which time we hopefully will have been able to sort out the 
> practicalities 
> > of issue tracking and publication on this list... 
> > 
> > Tom 
> > 
> > [1] https://github.com/dcmi 
> > [2] 
> http://wiki.dublincore.org/index.php/Schema.org_Alignment/Mappings_Deta 
> ils 
> > [3] http://www.doodle.com/6qwfqtvcg6nk2ghr 
> > 
> > -- 
> > Tom Baker <[log in to unmask]> 
 

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