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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

Content-Type:

text/plain

Parts/Attachments:

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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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