- From: Norman Gray <norman@astro.gla.ac.uk>
- Date: Thu, 2 May 2013 22:47:27 +0100
- To: Sebastian Hellmann <hellmann@informatik.uni-leipzig.de>
- Cc: Linking Open Data <public-lod@w3.org>
Sebastian, hello. While I'm on this topic.... On 2013 May 2, at 22:18, Sebastian Hellmann <hellmann@informatik.uni-leipzig.de> wrote: > I am not completely familiar with DOI. Am I right, that it more or less provides the same service as http://purl.org . > DOI links on the resource-level. You would still need frag ids to link to parts. > Firefox can actually handle this: > http://dx.doi.org/10.1038%2Fscientificamerican1210-80#atl It's not the same thing as purl.org. A DOI (parsed as "digital (object identifier)") is an opaque ID for an object of some time, which you look up in a distributed registry of resources. Thus your example of doi:10.1038/scientificamerican1210-80 is a name for that article. DOIs can also be looked up using the dx.doi.org service, but that's just a convenience interface to the underlying API, which is based on the broader-remit Handle system. Since there are no fragment IDs defined in the doi: URI scheme (as far as I recall), there's no meaning can be attached to the fragment in the dx.doi.org HTTP URI. It's also -- I _think_ -- not specified what precisely it is that the DOI denotes. The other big difference is that DOIs cost actual money, of the order of $1/DOI, though there's lots of variation. This is the sustainability model for DOIs: if one registry disappears, others can take over. The most common objects which are given DOIs are journal articles, of course, but there's currently a lot of effort going into the detailed mechanics of how you acquire a DOI for a dataset, what precisely that means, and what the cost model should be for registering DOIs in this context and in these numbers. See <http://www.datacite.org> That's the edited highlights: more details at <http://en.wikipedia.org/wiki/Digital_object_identifier> > If I am right, DOI also wouldn't be able to provide links to the 40 million mentions contained in the Wiki links corpus: > http://techcrunch.com/2013/03/08/google-research-releases-wikilinks-corpus-with-40m-mentions-and-3m-entities/ > That's 40 million DOIs .... I don't there would be such DOIs, unless someone has spent quite a lot of money registering them. Best wishes, Norman -- Norman Gray : http://nxg.me.uk SUPA School of Physics and Astronomy, University of Glasgow, UK
Received on Thursday, 2 May 2013 21:47:54 UTC