I think this kind of lightweight approach is really useful and worth
exploring, and not just for citations. Note the while you emphasize
the importance of PDF, the same techniques are easy to apply in HTML
and in authoring environments like Word.
I looked at using links to encode other metadata in this blog post:
http://ptsefton.com/2010/11/14/before-beyond-the-pdf-authoring-tools-for-document-semantics.htm
One way the Mendeley approach could be made more useful is to make it
more generic, so instead of it just having an explicit link to a
service which is not usable by non Mendeley user (I use Zotero).
Currently it's:
http://www.mendeley.com/import/?url=http://dx.doi.org/10.1002/asi.4630270505
It could look like this, using my proposed 'triplink' method of
encoding triples:
http://purl.org/triplink/decode?o=http://dx.doi.org/10.1002/asi.4630270505?p=http://purl.org/spar/cito/cites
(This link won't work - just an idea)
If you were to resolve that it would say:
<referring resource> http://purl.org/spar/cito/cites
http://dx.doi.org/10.1002/asi.4630270505
Or you could do it via the DOI resolver:
http://dx.doi.org/10.1002/asi.4630270505?triplink=http://purl.org/triplink/v/0.1&p=http://purl.org/spar/cito/cites
(Seems to work even with the cruft I added)
What I am getting at here is that the link in the PDF could be
something that is globally useful, and Mendeley, Zotero et al could
either filter it and change it its form, or scan the document and give
you a GUI to act on it. I'll add this to the demo on my WordPress
cite, and look at how it might be incorporated into our publishing
toolchain.
Going beyond this method, the whole idea of formatted citations and
references is really not necessary any more, is it? If we can reliably
identify citations each reader could choose their own preferred
referencing style although this would mess with hand-typeset PDFs. And
citation managers could simply embed links in text, and could create
bibliographies for any format much more easily than at present where
tools like Zotero have to very complicated processing to embed their
citation information in word processing files using fields and
bookmarks.
Peter
--
Peter Sefton
Manager, Software Research and Development Laboratory,
Australian Digital Futures Institute,
University of Southern Queensland
Toowoomba Queensland 4350 AUSTRALIA
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