On Mon, 2011-10-24 at 09:30 -0700, Eric Scott wrote:
> I'm loading an xml/rdf file provided by a third party using tdbloader2,
> and it throws this error:
> --
> Base URI is null, but there are relative URIs to resolve.: <>
> --
> The header of the rdf file does not have in fact have an xml:base
> clause, so I guess I'd need to edit the original RDF source to provide one?
Yes (in code you can set a base URI in the read call).
> In the hope of providing a meaningful value for this, I'd like to be
> able to see just what statement contained the relative URI that
> triggered this error, but tdbloader doesn't seem to be providing line
> numbers. Searching for <> turns up nothing. Is there a utility I can
> use that will give me this information?
Can't think of one. The chances are it is a line containing
rdf:about="" or rdf:about=''
so a judicious regexp search might turn it up.
> Failing that, does it even matter what value I use to provide the base
> URI? If not, I guess I can just stick in any old thing.
Depends on the data and what you are going to do with it.
The most common use of "" as a URI is to deliberately refer to the
document, eg in an owl:Ontology. In that case the URI should really be
the URL you got the data from. However, if you regard your copy as a
different document then give it any base you like.
Dave
