Semantic web: useful links

This blogpost will be updated with useful links related to the semantic web.  

RDF

• RDF primer (W3C)
• RDF schema (W3C)
• RDF validator (W3C)
• RDF (W3C)

SPARQL

• SPARQL (W3C)

OWL

• OWL reference (W3C)

Editors

• protégé  
• swoop
• topbraid composer
• ontotrack

Reasoning systems

• cerebra
• factplusplus 
• kaon2
• pellet
• racer
• cel

Visualizing

• neologism

Semantic web knowledge sources

• Semantic University 
• Semantic Web
  

RDF databases

• Stardog
• Talis systems
• ...

Frameworks

• Apache Clerezza
• Apache Stanbol  

Cloud RDF stores

• Dydra

Books

• Linked Data Patterns

FAQ

• http://answers.semanticweb.com