To learn

These are free, one stop shopping and online sources to learn about the Semantic Web:

The Semantic University by Cambridge Semantics

The EUCLID project (EdUcational Curriculum for the usage of LInked Data)

The blog series about British Library LOD by Leigh Dodds

The online training by the Joinup program of the European Commision

Books/Papers:

Protege documentation from Stanford University

Mark Watson’s books about rule programming for Semantic Web

Not free but elementary:

“Learning Sparql” by Bob DuCharme

“Semantic Web for the Working Ontologist” by Hendler and Allemang