I guess you are looking for the thread with the name "Where can I learn about the semantic web?", or?
Otherwise, if you wanna go a bit deeper into the foundations of the Semantic Web the field of Knowledge Representation and the nature of Ontology (yes philosophy) is important. Thereby, especially literature from John Sowa and Barry Smith is quite interesting.
Here is another thread with the title "What books would you recommend to anyone working with Semantic Web?", which includes also answer with more referenced threads on SemanticOverflow that mention further Semantic Web literature.
Finally, the thread "Seminal resources on general semantics and ontologies?" includes some references for huge field of logic.
13 Feb '11, 22:25