NIH Mandate and PMCIDs
The NIH Public Access Policy says "When citing their NIH-funded articles in NIH applications, proposals or progress reports, authors must include the PubMed Central reference number for each article" and the FAQ provides some examples of this:
Examples:
Varmus H, Klausner R, Zerhouni E, Acharya T, Daar A, Singer P. 2003. PUBLIC HEALTH: Grand Challenges in Global Health. Science 302(5644): 398-399. PMCID: 243493
Zerhouni, EA. (2003) A New Vision for the National Institutes of Health. Journal of Biomedicine and Biotechnology (3), 159-160. PMCID: 400215
It's interesting to note that on PMC itself both the PMCID and DOI are included - but the DOI isn't linked. Two things occur to me - 1) should CrossRef map DOIs to PMCIDs and vice versa and make PMCIDs available in it's query interfaces and 2) shouldn't publishers ask that the PMC copy of the article link back to the publisher version? It would be very easy with the DOI.

Comments
Shame they do not seem to be thinking globally Otherwise they might have offered - and recommended - a URI citation form for the PMCID so that it could participate in the larger semantic framework (aka the Web).
And there's already a well-known and standard vehicle for supporting this - and that's "info:" which effectively functions as an incubator for arbitrary identifiers that are seeking to progress to full-blown URI form.
Posted by: Tony Hammond | April 16, 2008 04:54 AM
Shame that they didn't think to think globally and suggest URI citation forms for the PMCIDs.
This could have been supported readily using the "info:" URI scheme which exists priamrily to act as an incubator for namespaces seeking representation in the wider semantic context (aka the Web).
As such, we've just got yet another bunch of numbers for some drudge (the reader) to transcribe.
Posted by: Tony Hammond | April 17, 2008 05:45 AM
This could have been supported readily using the "info:" URI scheme which exists priamrily to act as an incubator for namespaces seeking representation in the wider semantic context (aka the Web).
Posted by: mp4 player | April 18, 2008 10:52 PM