IFLA 2012 OCLC Linked Data Roundtable

Martin Malmsten
Head of Software Development
Libris dept., National Library of Sweden

Tuesday, August 14, 12

Libris - the Swedish Union
Catalogue

Contribute what is unique to
you, but gain access to all data


Swedish Union Catalogue available as Linked
Data (RDF) since 2008

The National Library of Sweden released the
National Bibliography and Authority ﬁle
(MARC21) with a CC0 license in 2011

LIBRIS is building a new catalogue backend
with SemWeb as a key technology


Open National
Bibliography

• Swedish National Bibliography and Authority File
released, in original format (MARC21), with a CC0
license

• Goal is to have the whole of LIBRIS released with CC0


Why CC0?

With 90 persons in this room, every minute I spend
talking about licenses is 1.5 hour not spent on
actually using data


A next, next, (next?)
generation
catalogue
• Format agnostic (MARC21, EAD, TEI, etc.)

• SemWeb technology a ﬁrst class citizen

• Transition to RDA


Either aggregate all data OR be able to cope
with the fact that data is created, updated and
deleted “elsewhere”


Three or four big aggregates of Linked Data is
not a web


Challenges

Building a big, networked, distributed graph poses some
challenges, for example:

1) Who to trust?

2) Seamlessness - you often need to react to changes in other
datasets, not only import data


Dealing with change

1) Atom feeds

2) OAI-PMH

3) No dumps - but you are free to create your own


Dealing with change

3) pubsubhubbub

4) ResourceSync


Conclusion
1) Actually using/consuming Linked Data, as opposed to only
exposing it, removes the technical distinction between
internal and external datasets.

2) Control becomes at matter of trust, not technology

3) The record disintegrates* as the data becomes distributed.

*pssssst, and is possibly replaced by something called named graphs


Linked Data

Contribute what is unique to
you, but gain access to all data


IFLA 2012 OCLC Linked Data Roundtable

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