Developer discussion for Creative Commons technology and tools

[Nathan Yergler <nathan AT creativecommons.org>]

We publish an RDF schema (http://creativecommons.org/schema.rdf) which
could be used to determine validity of CC REL properties/assertions
(ie, are they valid terms), but have not published an XSD to date.
This is due to the fact that we're primarily knowledgeable about RDF,
and a lack of demand.  Can you elaborate on what sort of CC REL data
you want to validate? License assertions about a work?  License
definitions?

If we can construct an XSD that meets your needs and accurately models
CC REL, I'd be happy to publish it on creativecommons.org and link to
it from our namespace (http://creativecommons.org/ns).  I can see how
having this would be very interesting for OAI-PMH and other
applications.  Is this something we could collaborate on developing?

Regards,

Nathan


On Wed, Jun 30, 2010 at 7:37 AM, Maarten Zeinstra <mz AT kl.nl> wrote:
> Thanks I will use it like this for the moment,
> Would it be a good idea to look into an xsd for ccREL?
> There is already a good human readable guideline, but as far as I can find
> no automated way of checking the validity of data structured in ccREL.
> Looking deeper into OAI-PMH I see that they have some structures available
> to put rights informationan, although this refers to the metadata itself not
> the object is describes.
> Adoption of ccREL in a future version of OAI-PMH could benefit the use of
> ccREL greatly as well as giving archives a way to more accurately describes
> the rights status of the works they put out there.
> Cheers,
> Maarten Zeinstra
> Kennisland | Knowledgeland
>
> T: +31.20.575.6720 | E: mz AT kl.nl
> www.kennisland.nl | www.knowledgeland.org
>
> On Jun 30, 2010, at 24:14 , Nathan Yergler wrote:
>
> That makes sense to me, Maarten.
>
> NRY
>
> On Tue, Jun 29, 2010 at 4:58 AM, Maarten Zeinstra <mz AT kl.nl> wrote:
>
> Hi Nathan,
>
> I used this as my starting point:
>
> http://www.openarchives.org/OAI/2.0/rdf.xsd
>
> which is the structure to include rdf in the OAI protocol
>
> I derived from that that construct needs to have the following form:
>
> <rdf:RDF
>
>   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#";
>
>   xsi:schemaLocation="http://www.w3.org/1999/02/22-rdf-syntax-ns#
>
>  http://www.openarchives.org/OAI/2.0/rdf.xsd";>
>
> </rdf:RDF:>
>
> Then I probably made a mistake by replacing
>
> http://www.openarchives.org/OAI/2.0/rdf.xsd
>
> with
>
> http://creativecommons.org/ns#
>
> instead of replacing the first
>
> http://www.w3.org/1999/02/22-rdf-syntax-ns#
>
> I am equally not sure about the schemalocation.
>
> Probably the right way to use ccREL here is:
>
> <rdf:RDF
>
>   xmlns:cc="http://creativecommons.org/ns#";
>
>   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#";
>
>   xsi:schemaLocation="http://www.w3.org/1999/02/22-rdf-syntax-ns#
>
>  http://www.openarchives.org/OAI/2.0/rdf.xsd";>
>
> </rdf:RDF:>
>
> Would you agree?
>
> Maarten Zeinstra
>
> Kennisland | Knowledgeland
>
> T: +31.20.575.6720 | E: mz AT kl.nl
>
> www.kennisland.nl | www.knowledgeland.org
>
> On Jun 28, 2010, at 19:19 , Nathan Yergler wrote:
>
> Hi Maarten,
>
> We do not currently have an XSD for the CC namespace, so assuming you
>
> can include RDF directly, that seems like the easiest way to get
>
> started.  Note that I'm not an expert on OAI-PMH, so I'm not certain
>
> that's possible.
>
> That said, the example you gave seems a little strange to me.  In the
>
> rdf:RDF element, you declare the rdf as
>
> "http://www.w3.org/1999/02/22-rdf-syntax-ns#";.  Under normal RDF/XML
>
> rules (assuming those apply here) "rdf:attributionName" would be
>
> interpreted as http://www.w3.org/1999/02/22-rdf-syntax-ns#attributionName.
>
> I don't think that's what you're going for.  I'd expect to see
>
> something like:
>
> <rdf:RDF
>
> xmlns:rdf=”http://www.w3.org/1999/02/22-rdf-syntax-ns#”
>
> xmlns:cc="http://creativecommons.org/ns#";>
>
> and then "cc:attributionName", "cc:attributionUrl", etc.  I'm also not
>
> clear what the point of xsi:schemaLocation is on rdf:RDF.
>
> Apologies if my comments reveal some deep-seated misunderstanding of
>
> OAI-PMH.  It'd be great to have a functional example of CC REL in
>
> OAI-PMH, so I'd love to work through the issues and get this
>
> documented.
>
> Regards,
>
> Nathan
>
>
> On Mon, Jun 28, 2010 at 7:35 AM, Maarten Zeinstra <mz AT kl.nl> wrote:
>
> Hello list,
>
> I'm trying to make an implementation of ccREL for OAI-PMH to communicate
>
> specific ccREL information. I could not find examples or explanations how
>
> this could be added so I thought I post it on the list.
>
> I've used the standard RDF implementation to bypass the need to have an xsd,
>
> which as far as I know there is none of ccREL is there?
>
> That would result to a record that would like this? Wouldn't it?
>
> <record>
>
> <header>
>
> <identifier>...</identifier>
>
> <datestamp>1962-05-04T00:00:00Z</datestamp>
>
> </header>
>
> <metadata>
>
> <oai_dc:dc xsi:schemaLocation="
>
> http://www.openarchives.org/OAI/2.0/oai_dc/
>
> http://www.openarchives.org/OAI/2.0/oai_dc.xsd";>
>
> ....
>
> </oai_dc:dc>
>
> <rdf:RDF
>
> xmlns:rdf=”http://www.w3.org/1999/02/22-rdf-syntax-ns#”
>
> xsi:schemaLocation=
>
> ”http://www.w3.org/1999/02/22-rdf-syntax-ns#
>
> http://creativecommons.org/ns#”>
>
> <RDF:attributionName>
>
> [maker]
>
> </RDF:attributionName>
>
> <RDF:attributionURL>
>
> [locatie op openbeelden.nl]
>
> </RDF:attributionURL>
>
> <RDF:license>
>
> [licentie url]
>
> </RDF:license>
>
> </rdf:RDF>
>
> </metadata>
>
> </record>
>
> Best,
>
> Maarten Zeinstra
>
> Kennisland | Knowledgeland
>
> T: +31.20.575.6720 | E: mz AT kl.nl
>
> www.kennisland.nl | www.knowledgeland.org
>
> _______________________________________________
>
> cc-devel mailing list
>
> cc-devel AT lists.ibiblio.org
>
> http://lists.ibiblio.org/mailman/listinfo/cc-devel
>
>
>
>
>
>
>
>