Subject classification and statistics share some common problems. This post takes a small example discussed at this week’s ODaF event on “Semantic Statistics” in Tilberg, and explores its expression coded in the Universal Decimal Classification (UDC). UDC supports faceted description, providing an abstract grammar allowing sentence-like subject descriptions to be composed from the “raw materials” defined [...]
Category Archives: SKOS
Twitter Iran RT chaos
From Twitter in the last few minutes, a chaos of echo’d posts about army moves. Just a few excerpts here by copy/paste, mostly without the all-important timestamps. Without tools to trace reports to their source, to claims about their source from credible intermediaries, or evidence, this isn’t directly useful. Even grassroots journalists needs evidence. I [...]
Also posted in Activism, Conspiracy Theory, FOAF, Politics, Project ideas, The Web at War, ggg, openid, privacy Tagged identica, iran, iranelection, journalism, tehran, twitter, witness 3 Comments
Skosdex progress: basic lucene search
I now have a crude Lucene index derrived from SKOS data. It is more or less a toy example, but somehow promising also.
Example below is a test against FAO’s AGROVOC. Each concept becomes a “document”, with a “word” field containing the prefLabel, and a “uri” field for the concept URI. I don’t index anything else [...]
Also posted in Semantic Web, Technology, coding, foaf4lib, ggg Leave a comment
Skosdex: SKOS utilities via jruby
I just announced this on the public-esw-thes and public-rdf-ruby lists. I started to make a Ruby API for SKOS.
Example code snippet from the readme.txt (see that link for the corresponding output):
require “src/jena_skos”
s1 = SKOS.new(“http://norman.walsh.name/knows/taxonomy”)
s1.read(“http://www.wasab.dk/morten/blog/archives/author/mortenf/skos.rdf” )
s1.read(“file:samples/archives.rdf”)
s1.concepts.each_pair do |url,c|
puts “SKOS: #{url} label: #{c.prefLabel}”
end
c1 = s1.concepts["http://www.ukat.org.uk/thesaurus/concept/1366"] # Agronomy
puts “test concept is “+ c1 + ” ” [...]
Also posted in Project ideas, SPARQL, Semantic Web, Technology, coding, foaf4lib, ggg, ruby, swig Leave a comment
Cross-browsing and RDF
Cross-browsing and RDF
While cross-searching has been described and demonstrated through this paper and associated work, the problem of cross-browsing a selection of subject gateways has not been addressed. Many gateway users prefer to browse, rather than search. Though browsing usually takes longer than searching, it can be more thorough, as it is not dependent on [...]
Also posted in Activism, Project ideas, Semantic Web, coding, foaf4lib, ggg, swig Leave a comment
SKOS deployment stats from Sindice
This cropped up in yesterday’s W3C Semantic Web Coordination Group telecon, as we discussed the various measures of SKOS deployment success.
I suggested drawing a distinction between the use of SKOS to publish thesauri (ie. SKOS schemes), and the use of SKOS in RDFS/OWL schemas, for example subclassing of skos:Concept or defining properties whose range or [...]
Also posted in Project ideas, RDF, Semantic Web, coding, foaf4lib Leave a comment
Beautiful plumage: Topic Maps Not Dead Yet
Echoing recent discussion of Semantic Web “Killer Apps”, an “are Topic Maps dead?” thread on the topicmaps mailing list. Signs of life offered include www.fuzzzy.com (‘Collaborative, semantic and democratic social bookmarking’, Topic Maps meet social networking; featured tag: ‘topic maps‘) and a longer-list from Are Gulbrandsen who suggests a predictable hype-cycle dropoff is occuring, as [...]