You may have heard that [lcsh.info](http://lcsh.info/) – which explored how Library of Congress Subject Headings could be represented as a Semantic Web application – [was closed down last month](http://lcsh.info/2008/12/19/uncool-uris/).
The good news is that there are now two new projects publishing library-related open data:
The first, ICONCLASS, is “an experimental service that makes the ICONCLASS Iconographic Classification system available as linked-data using the SKOS vocabulary”.
The second, from the University of Huddersfield Library, publishes circulation and recommendation data under both [CC0](http://wiki.creativecommons.org/CC0) and the [PDDL](http://www.opendatacommons.org/). Dave Pattern [writes](http://www.daveyp.com/blog/archives/528):
> In total, there’s data for over 80,000 titles derived from a pool of just under 3 million circulation transactions spanning a 13 year period.
Data is comprised of two parts:
> 1. Circulation Data. This breaks down the loans by year, by academic school, and by individual academic courses. This data will primarily be of interest to other academic libraries. UK academic libraries may be able to directly compare borrowing by matching up their courses against ours (using the UCAS course codes).
> 2. Recommendation Data. This is the data which drives the “people who borrowed this, also borrowedâ€¦” suggestions in our OPAC. This data had previously been exposed as a web service with a non-commercial licence, but is now freely available for you to download. We’ve also included data about the number of times the suggested title was borrowed before, at the same time, or afterwards.