Re: LOD datasets "schema-triples"

Hi Chris,
  The schemas are de-coupled from the datasets: a standard linked data
schema can be used by any number of datasets, and a given dataset can use a
number of schemas.  You can see what properties and classes are in use in
the dataset, and the prefixes on those should be mapped to URLs at the top
of the file.  Those URLs should be links to the schema.  e.g. if you see a
foaf:name property being used, there should be something at the top like
'xmlns:foaf="http://xmlns.com/foaf/0.1/"'.
The schema should tell you the data type of those properties. I don't see
cardinality declared as often.  If something is declared as a
'FunctionalProperty', it ought to have a maximum cardinality of one.  There
are more specific cardinality declarations in OWL out there, also.
-Leif

On Sun, Jun 12, 2011 at 9:41 AM, Christian Rivas
<chris.rivas.lod@gmail.com>wrote:

> Hi Leif,
>
> I mean something like DBpedia Ontology T-BOX (Schema<http://downloads.dbpedia.org/3.6/dbpedia_3.6.owl.bz2>
> ),
> I would like to get the T-BOX from the others Linked Open Data Datasets
> (e.g. DBLP, BBC).
>
> Regards,
>
> Chris
>
> On Sat, Jun 11, 2011 at 12:27 AM, Leif Warner <abimelech@gmail.com> wrote:
>
>> Do you mean things like:
>> http://xmlns.com/foaf/spec/index.rdf
>> ?
>> Some popular schemas are list at:
>> http://prefix.cc/popular
>> If you do an HTTP get request against those URLs with the accept-header
>> set to an rdf format, you should get back machine-readable versions of
>> those.  Or you can just click through the webpages to download them.
>> -Leif Warner
>>
>>
>> On Fri, Jun 10, 2011 at 10:53 AM, Christian Rivas <
>> chris.rivas.lod@gmail.com> wrote:
>>
>>> Hi all,
>>>
>>> I would like to know, if anyone knows where could I find the
>>> schema-triples** of the current LOD datasets?
>>>
>>> **Schema triples  =  RDF Schema or OWL Ontology that reflects the
>>> constraints (cardinality) over the classes and properties in the generated
>>> RDF dataset).
>>>
>>> Chris
>>
>>
>>
>