I’m trying to add the W3C PROV ontology as new vocabulary, but the import fails without a descriptive error message or log file entry. I’ve tried uploading via URL http://www.w3.org/ns/prov-o and file in combination with file formats [autodetect], Turtle and RDF/XML. All give the same error.
I’m using Omeka v4.0.4. Ran into this problem after updating the schema.org vocabulary without a problem.
Strange. I successfully imported the vocabulary with the following data:
Namespace URI: http://www.w3.org/ns/prov#
Vocabulary URL: https://www.w3.org/ns/prov-o
File format: [Autodetect]
Due to a recent security issue, we had reason to make that error message generic. We recognize that this makes it difficult to troubleshoot, so we have a pull request that makes the message more specific. In your case it’s likely that Omeka’s RDF library couldn’t load the vocabulary from the URL. Could you have intermittent connection problems?
I used the namespace URI http://www.w3.org/ns/prov-o# (with -o) which Omeka S doesn’t accept. The URI http://www.w3.org/ns/prov# (which you suggested and actually is the correct one) is accepted with no problem!
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