Re: [topbraid-users] Working with multiple Ontologies and referring to existing foaf files

Sun, 24 Jul 2011 08:31:29 -0700

On 7/23/11 7:55 PM, brucewhealton wrote: 
2) I know there is an option to set the root element of the RDF
document but instead of using something like MyPersonClass or Thing,
can I make it foaf:Person?  How?

Bruce, I'm not clear what you mean by this.  I expect that you mean using owl:Thing as the root class for your concepts.  This is a W3C standard that allows any set of ontologies to be merged with a common root class - owl:Thing.  I really doubt you want to use anything else as the class root.

If you mean the root element of an RDF/XML document, that element is rdf:RDF, and it can't be changed.

There seems to be a conflation of the RDF/XML text serialization syntax and RDF.  I'll offer a strong suggestion to work in Turtle, which represents RDF in triple format (soon to be the same as SPARQL).  Conceptually this is much cleaner than RDF/XML.  It's also more compact and will load quicker, but the real key is that the added complexities of representing triples in a tree syntax disappear.  If you need RDF/XML for some third-party vendor, Composer has a few ways to export to RDF/XML when needed.  In particular see Export > Export/Merge Convert RDF Graphs

-- Scott





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