On 6/2/11 4:27 AM, Christoph Lange wrote:
Dear all,
in the context of our Planetary social semantic environment for
scientific, technical, and mathematical documents
(http://trac.mathweb.org/planetary), we needed a SKOS implementation
of the ACM Computing Classification System
(http://www.acm.org/about/class/ccs98-html). This is now public at
its namespace URI
http://oaff.info/ontology/acm-ccs#
... and has been validated with the poolparty SKOS consistency checker
(http://demo.semantic-web.at:8080/SkosServices/check -- thanks for
providing that!). For now it's just one static RDF/XML file, but we
will soon also serve it through a SPARQL endpoint. Let me know what
you need, and we might be able to reprioritize these things. I just
thought it makes sense to already announce it now, as there is so much
redundant work done on this due to not being aware of existing
implementations.
Note that we have not yet considered copyright issues -- but at least
preserved the original ACM copyright statement, which permits
"personal or classroom use". That's probably not enough for
reasonable Linked Data applications. I would be glad if someone
familiar with the subject could point out what to do. What did
previous publishers of RDF versions of the ACM CCS do?
Some technical notes:
* We started with the RKB Explorer RDFS implementation of the ACM CCS
(which used rdfs:subClassOf, see
http://acm.rkbexplorer.com/ontologies/acm#)
* Besides the pure concept hierarchy, we (manually) added further
information from the original HTML source:
* examples for certain concepts (skos:example)
* cross-references to related concepts (skos:related)
* notes on deprecated concepts (skos:historyNote)
While not having verified it formally, we are 99.9% sure that our
implementation completely covers the ACM CCS.
BTW, to see how _we_ are using this, I have, for now, to point you to
something similar: We serve the content of the PlanetMath.org
encyclopedia through our system and enable by-topic navigation powered
by a SKOS implementation of the MSC (Mathematical Subject
Classification): see
http://trac.mathweb.org/planetary/wiki/Demo_PlanetMath for a
description and http://alpha.planetmath.org/article/msc for the
system. The association of PlanetMath articles to their MSC classes
is made by translating the LaTeX sources of the articles, which have a
custom MSC metadata macro, to XHTML+RDFa, using dct:subject. Soon
there will be a similar navigation through arXiv.org articles served
via our system (http://trac.mathweb.org/planetary/wiki/Demo_arXiv), as
well as our own "dog-fooded" computer science lecture notes
(http://trac.mathweb.org/planetary/wiki/Demo_PlanetBox). Note that
arXiv articles may have both MSC and ACM classifications, so aligning
those two SKOS concept schemes is also planned.
Note that our MSC SKOS implementation is a preliminary and unofficial
one (and therefore not yet available under a stable URI). It is
incomplete and just good enough to drive the Planetary navigation. In
collaboration with the AMS, the maintainer of the MSC, we are working
on a complete and official SKOS reference implementation, obtained by
translating the original plain-TeX sources to RDF, which will soon be
available from http://www.msc2010.org.
Cheers,
Christoph
Christoph,
Great stuff!
See:
http://linkeddata.uriburner.com/describe/?url=http%3A%2F%2Facm.rkbexplorer.com%2Fontologies%2Facm%23K.8.1
.
Would be nice if you increase navigability (of the follow-your-nose
variety) by adding skos:inScheme relations to your dataset .
--
Regards,
Kingsley Idehen
President& CEO
OpenLink Software
Web: http://www.openlinksw.com
Weblog: http://www.openlinksw.com/blog/~kidehen
Twitter/Identi.ca: kidehen
