Tag: semweb

LCSH.info shutdown

Unfortunately the Library of Congress has asked Ed Summers to take down LCSH.info. Apparently because it was ”confusing”. This is a shame since the Swedish Subject Headings were linked to LCSH through LCSH.info URIs.

Even though Ed hints that an official LC service might become available later on a better approach would have been to let LCSH.info exist until then and then redirect (both in an HTTP and SemWeb sense) the old URIs to the new ones. Or just let them coexist Or just leave the RDF and SPARQL-endpoint available.

Anyway, LCSH.info was a great service while it lasted.

1 kommentar 26 december, 2008 Martin


Nu finns ännu en LIBRIS-blogg: semweb@libris. Syftet är att få ut information och få feedback kring LIBRIS arbete med semantisk webb i allmänhet och Linked Data i synnerhet.

Kommentera 4 december, 2008 Martin

Links to DBpedia added

Just added 4.669 links to DBpedia. Just persons for now. I used the german persondata dataset to make the mapping. The assumption I am making is that if the string [name] + [year of birth] maps to exactly one URI in each database, then they are assumed to be the same person. This does not work 100%, on the other hand nothing does. What’s nice though is that I get to actually use the different names in the authority record.

However, since DBpedia has some books as well the mapping could be made more exact by matching our books to theirs. In the future, given that more libraries embrace Linked Data, disambiguating authors with the same name should be fairly easy when you have access to some of their books as well. I’m guessing that is what is happening behind the scenes at VIAF.

There’s more coming, for example persons with non-ascii characters in their names did not match due to differences in encoding. In the end we will have to do some manual work as well. Quality control and names that needs to be disambiguated, etc, etc.

Jimi Hendrix – http://libris.kb.se/resource/auth/243497

3 kommentarer 3 december, 2008 Martin

Links to lcsh.info added

12.586 of our Swedish subject headings are now linked to lcsh.info. Go SPARQL!

1 kommentar 3 december, 2008 Martin

LIBRIS available as Linked Data

LIBRIS, the Swedish Union Catalogue, has for some time now been available as Linked Data. Examples, of which some may hurt your eye if looked at in a HTML-browser; never fear, in time they will become beautiful, and might even include a squiggly animation.

The Difference Engine: http://libris.kb.se/resource/bib/5060570
Subject Heading ”Mödrar” (Mothers): http://libris.kb.se/resource/auth/154863
August Strindberg: http://libris.kb.se/resource/auth/94541
The Royal Library:  http://libris.kb.se/resource/library/S

In a terminal window you can use curl to see the content negotioation in action:

curl --include --location --header accept:text/rdf+n3 http://libris.kb.se/resource/bib/5060570

We have used a mix of ontologies (FOAF, SKOS, Bibliontology, …), focusing on availability first rather than perfect representation of the underlying MARC-record. That comes later. The RDF also exposes some parts of our FRBR-algorithm, showing links between records believed to belong to the same work.

What we are working on right now is creating links to external datasets such as DBPedia/Wikipedia and between our own subject headings and to LCSH. This is pretty easily done once you have the data in RDF by the way.

As this is a work in (hopefully constant) progress, any input is appreciated. I will try to go into more detail later, until then I leave you with this picture.


5 kommentarer 3 december, 2008 Martin


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