Attempting to import the file from a local copy, using various file format combinations, yields error: “Error importing the vocabulary. Check the file or URL.” As a newbie, I haven’t a clue of what the next step is to get the vocab.
Although only the creator/contributor part of the complete PBcore is needed, importing the complete vocabulary would also be satisfactory.
“PBCore creatorRole/contributorRole” is a controlled vocabulary, not a RDF vocabulary (containing what PBCore calls “elements”). You cannot import controlled vocabularies using Omeka’s import vocabulary feature. You can add controlled vocabularies using the Custom Vocab module. In your case, I’d download the “PBCore creatorRole/contributorRole” spreadsheet, copy the “Terms” column, and paste them into Custom Vocab’s “Terms” text box.