| http://www.w3.org/ns/prov#value | - Looks like the pdf specs support some tagging:Quotefrom atom prober in the comments: PDF supports XMP. XMP allows all the dublin core metadata that Zotero, refbase, OpenOffice.org, and other products are using.We just need to have publishers care enough to put this data in and more end-user tools to index/view/search/edit it.Now we only need someone to code/maintain a central repository of pdf met
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