SEP 21st 2007

Ping the Semantic WebPing the Semantic Web, the repository for RDF documents, has a page that lists every namespace they've come across as well as the number of references to each namespace. I've listed the top 20 namespaces and the number of references to each. It's interesting to see the sharp drop in references once you get past the top 5. Each of the links below point to a Zitgist Browser page for that namespace so that you can explore them further.

http://xmlns.com/foaf/0.1/
#1 - 846,893 references
http://blogs.yandex.ru/schema/foaf/
#2 - 576,208 references
http://www.w3.org/2003/01/geo/wgs84_pos#
#3 - 142,875 references
http://rdfs.org/sioc/ns#
#4 - 48,752 references
http://rdfs.org/sioc/types#
#5 - 39,300 references
http://www.geonames.org/ontology#
#6 - 4,772 references
http://www.w3.org/2002/07/owl#
#7 - 3,764 references
http://purl.org/vocab/bio/0.1/
#8 - 3,057 references
http://smw.ontoware.org/2005/smw#
#9 - 2,553 references
http://www.w3.org/1999/02/22-rdf-syntax-ns#
#10 - 2,169 references
http://purl.org/rss/1.0/
#11 - 2,072 references
http://www.w3.org/2004/12/q/contentlabel#
#12 - 1,869 references
http://web.resource.org/cc/
#13 - 813 references
http://usefulinc.com/ns/doap#
#14 - 798 references
http://www.daml.org/2001/10/html/airport-ont#
#15 - 441 references
http://www.w3.org/1999/
#16 - 430 references
http://www.icra.org/rdfs/vocabularyv03#
#17 - 420 references
http://ontoworld.org/wiki/Special:URIResolver/
#18 - 415 references
http://www.w3.org/2000/01/rdf-schema#
#19 - 402 references
http://purl.org/stuff/rev#
#20 - 319 references

About the author

James Simmons

It's my goal to help bring about the Semantic Web. I also like to explore related topics like natural language processing, information retrieval, and web evolution. I'm the primary author of Semantic Focus and I'm currently working on several Semantic Web projects.

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