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I have a software that generates an RDF representation of certain dataset. I want to add to the generated data also some metadata describing not specific data contained in the data set but the document itself - i.e., when the document was created, by which software, which version, etc. The schema.org properties provide the necessary relationships, but I can not figure out the proper place to attach it. Is there some standard way of saying "this is the metadata about the document itself" in RDF? I use Turtle serialization for RDF but generic answer working with any serialization would be preferable.

Tunaki
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StasM
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  • Do you ask where to place the RDF in an HTML document, or how to differentiate triples about the dataset from triples about the document? – unor Feb 20 '15 at 17:41
  • @unor I am asking if there is any standard (or customary) way to express the fact that the subject of the triple in the document containing the triple. – StasM Feb 20 '15 at 19:52

2 Answers2

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There is not a standard place to do this. A RDF graph is just a collection of triples; it's not identified by an IRI or anything like that. (However, in SPARQL datasets, you could post some metadata about a named graph by using the name of the graph as the subject in a triple. That would just be a convention, though. It's not "official" in any sense.)

In the RDF serializations of OWL ontologies, there can be an ontology element (i.e., a resource with the type owl:Ontology), and that can be used to associate some metadata with the ontology. You'd probably want to adopt an approach like that. That is, you'd establish a convention with something like 

@prefix ex: <...>

[] a ex:DatasetRepresentation ;
   ex:created "..." ;
   ex:representationOf <...> .

#... rest of generated content ...
Joshua Taylor
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I am not that familiar with Schema.org, but both DCat and Doublin Core provide means to do so.

In Doublin Core there is the identifier Data property. An example:

PREFIX : <http://my.domain/meta-data#>
PREFIX dcterms: <http://purl.org/dc/terms/>

:1 a dcterms:BibliographicResource ;
    dcterms:identifier <http://my.domain/my-document> .

A similar record but now using DCat and the landingPage data property:

PREFIX : <http://my.domain/meta-data#>
PREFIX dcat: <http://www.w3.org/ns/dcat#>

:1 a dcat:Resource ;
    dcat:landingPage <http://my.domain/my-document> .
Luís de Sousa
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