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We just registered in the SRU (Search and Retrieve by URL) search registry the following components: Context Sets PRISM Context Set version 2.0 PRISM Context Set version 2.1 Schemas PRISM Aggregator Message Record Schema Version 2.0 PRISM Aggregator Message Record Schema Version 2.1 This means that an SRU (Search and Retrieve by URL) search engine that supported one of the PRISM context sets registered above could accept CQL (Contextual Query Language) queries such as the following:

An Overview of the OAI Object Reuse and Exchange Interoperability Framework View more Microsoft Word documents from hvdsomp. This is a very slick presentation by Herbert Van de Sompel on OAI-ORE which he’s due to give today for a workshop at the INFORUM 2009 15th Conference on Prrofessional Information Resources in Prague. It’s on the long side at 167 slides but even if you just flip though or sample it selectively you’ll be bound to come away with something.

The new OAI-PMH interface to Nature.com sports one particular novelty which may well be of interest here: it makes use of the PRISM Aggregator Message. (For an announcement of this service see the post on our web publishing blog Nascent.)

As a protocol for the harvesting of metadata records within a digital repository, OAI-PMH records may be expressed in a variety of different metadata formats. For reasons of interoperability a base metadata format (‘Dublin Core’) is mandated for all OAI-PMH implementations. The expectation is that this base format would be augmented by community-specific vocabularies.

Our natural inclination was to mirror the article descriptions which we already circulate in our RSS feeds and within our HTML pages (as META tags) and PDF files (as XMP packets). In these cases we have used open data models (e.g. RDF) with simple properties cherry-picked from the DC and PRISM namespaces. But OAI-PMH has a special ‘gotcha’ in this regard: any metadata format must allow for W3C XML Schema validation. That is, the properties need to be constrained by an XSD data model. Enter PRISM Aggregator Message (PAM).

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Over the past two weeks we’ve focused on our OpenURL query interface with the goal being to improve its reliability. I’d like to mention some things we’ve done. We now require an OpenURL account to use this interface (see the registration page) . This account is still free, there are no fixed usage limits, and the terms of use have been greatly simplified. Resources have been re-arranged dedicating more horse-power to the OpenURL function.

OCLC has published a report (PDF) identifying some requirements for what they call a “Cooperative Identities Hub”. A quick glance through it seems to show that the use cases focus on what we are calling the “Knowledge Discovery” use cases. As I mentioned in my interview with Martin Fenner, there is also a category of “authentication” use cases that I think needs to be addressed by a contributor identifier system. Still, this is a good report that highlights many of the complexities that an identifier system needs to address.

Martin Fenner continues his interest in the subject of author identifiers. He recently posted an online poll asking people some specific questions about how they would like to see an author identifier implemented.* The results of the poll are in and, though the sample was very small, the results are interesting. The responses are both gratifying -there seems to be a general belief that Crossref has a roll to play here- and perplexing -most think the identifier needs to identify other “contributors” to the scholarly communications process- yet there seems to be a preference for the moniker “digital author identifier”.

So while doing some background reading today I realized that legal citations already widely support a form of “citation typing” in the form of “Introductory Signals“. The 10 introductory signals break down as follows… In support of an argument: 1) [no signal]. (NB that, apparently, this is increasingly deprecated.) 2) accord; 3) see; 4) see also; 5) cf.; For Comparisons: 6) compare … with …; For contradiction: 7) but see;

I was happy to read David Shotton’s recent Learned Publishing article, Semantic Publishing: The Coming Revolution in scientific journal publishing, and see that he and his team have drafted a Citation Typing Ontology.* Anybody who has seen me speak at conferences knows that I often like to proselytize about the concept of the “typed link”, a notion that hypertext pioneer, Randy Trigg, discussed extensively in his 1983 Ph.D. thesis.. Basically, Trigg points out something that should be fairly obvious- a citation (i.

Discussions around “contributor Ids” (aka “Author ID, Researcher ID, etc.) seem to be becoming quite popular. In the interview that I pointed to in my last post, I mentioned that Crossref has been talking with a group of researchers who were very interested in creating some sort of authenticated contributor ID as a mechanism for controlling who gets trusted access to sensitive genome-wide aggregate genotype data. Well, I’m delighted to say that said group of researchers(at the GEN2PHEN project) have created a “Researcher Identification Primer” website in which they outline the many use-cases and issues around creating a mechanism for unambiguously identifying and/or authenticating researchers.

Over the past few months there seems to have been a sharp upturn in general interest around implementing an “author identifier” system for the scholarly community. This, in turn, has meant that more people have been getting in touch with us about our nascent “Contributor ID” project. The other day, after seeing my comments in the above thread, Martin Fenner asked if he could interview me about the issue of author identifiers for his blog on Nature Networks, Gobbledygook.