OWL Test Results - OWL Implementations

http://www.w3.org/2003/08/owl-systems/test-results-out#systems

http://www.w3.org/2001/sw/WebOnt/impls

Developers Guide to Semantic Web Toolkits

This guide collects links to Semantic Web toolkits for different programming languages and gives an overview about the features of each toolkit, the strength of the development effort and the toolkit's user community.

http://www.wiwiss.fu-berlin.de/suhl/bizer/toolkits/

Myths in Using OWL as Schema-language

Nice overview of misconceptions while considering OWL as schema-language

http://esw.w3.org/mt/esw/archives/000048.html

Validation of RDF against RDFS

Hints on validating RDF against RDFS


http://esw.w3.org/mt/esw/archives/000051.html

Mark-up Languages comparsion

Nice comparsion between XML-Schema, RDF, RDFS and OWL.

http://www.isi.edu/expect/web/semanticweb/comparison.html

http://www.daml.org/language/features.html