It’s been great to see RDFa being picked up by web2.0 publishers like Digg and MySpace. You can use the RDFa Distiller to extract the RDFa from a given web page u by constructing a URI like:
http://www.w3.org/2007/08/pyRdfa/extract?format=turtle&uri=u
Which translates kind of nicely into a command line utility to add to your ~/bin:
#!/bin/sh
curl “http://www.w3.org/2007/08/pyRdfa/extract?format=turtle&uri=$1″
So with that [...]
The news about 100,000 books on Freebase got me poking around with curl. I was pleased to see that Freebase actually distinguishes between a book as a work, and a particular edition of that book. To FRBR aficionados this will be familiar as the difference between a Work and a Manifestation:
For example here is a [...]
Terry’s analysis of the proposed changes to OCLC’s record policy is essential reading. I’m really concerned that these 996 fields will slip somewhat unnoticed into data that I use.
996 $aOCLCWCRUP $iUse and transfer of this record is governed by the OCLC® Policy for Use and Transfer of WorldCat® Records. $uhttp://purl.org/oclc/wcrup
This appears to be an engineered, [...]
I just saw Diane Vizine-Goetz demo OCLC’s Terminology Services at the CENDI/SKOS meeting and was excited to see various things out on the public web. For example, the LCSH concept “World Wide Web” is over here:
http://tspilot.oclc.org/lcsh/sh2008114004
At the moment it’s not the most friendly human readable display, but that’s just a XSLT stylesheet away [...]
Via Ivan Herman I learned that the Semantic Web Use Cases use concepts from lcsh.info. For example look at the RDFa in this case study for the Digital Music Archive for the Norwegian National Broadcaster. You can also look at the Document metadata in a linked data browser like OpenLink. Click on the “Document” and [...]
I’m currently listening to Richard Wallis’ interview w/ Martin Malmsten of the Royal Library of Sweden. It’s a really fascinating view inside a library, and the mind of a developer that are publishing bibliographic resources as linked data.
Partly as a dare from Roy Tennant to do something useful with linked-data, I spent 30 minutes w/ [...]
In an effort to get a better understanding of PREMIS after reading about the v2.0 release, I dug around for 5 minutes looking for a way to convert an XML Schema to RelaxNG. The theory being that the compact syntax of RelaxNG would be easier to read than the XSD.
I ended up with a little [...]
There’s a fascinating modeling discussion going on over on the DC-RDA list about whether RDA properties should reference literals or resources in descriptions. For example when describing an author you could use a literal:
Twain, Mark, 1835-1910
or a resource:
http://lccn.loc.gov/n79021164
There are some shades of gray in between (using blank nodes, auto-generated URIs, typed literals) but that’s the [...]
The recent OAI-ORE meeting was just up the road in Baltimore, so it was easy for a bunch of us from the Library of Congress to attend. I work on a team at LC that is specifically looking at the role that repositories play at the library; I’ve implemented OAI-PMH data providers and harvesters, and [...]
The OAI-ORE meeting is coming up, and in general I’ve been really impressed with the alpha specs that have come out. It’s not clear that there’s an established vocabulary for talking about aggregated resources on the web, so the Data Model and Vocabulary documents were of particular interest to me.
One thing I didn’t quite understand, [...]
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