Hi Adia,

TBC will use a file:/... base URI if it cannot figure out a more meaningful URI. This is the case if the file neither contains an owl:Ontology instance nor an xml:base. Note that TBC cannot know from where you downloaded the file, so it needs to make some guess.

To overcome this, use File > Import > TopBraid > Import RDF or OWL File from the Web, which will create a new copy with the "correct" metadata.

Alternatively, use File > Export > TopBraid > Export/Merge/Convert RDF Graph with your RDF file already open.

You may want to switch to Turtle notation at this opportunity.

HTH
Holger


On 7/10/2013 16:33, Adia Delailah wrote:
Hi
I have persists a problem of an ontology that i download from the internet.The problem that i encountered is that once i open the file it keep referring to this address as it's base URI: file:/C:/Users/Adia.delailah/TBC-workspace/TopBraid/Baru/po_2.rdf file.I already tried to change it to more standard way of naming the uri such as" http://www.purl.com/dc/"; .After I saved , closed and reopened again, the problem still exist.I hope that any of you can give me suggestion on how to overcome this problem..Thanks. :)

Regards
Adia

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