theory behind semantics, RDF, OWL What are the fields of mathematics related with semantics technologies and their specifications as RDF, OWL, SPARQL?
If somebody working as a programmer with those technologies (using them with a practical scope and from a pragmatic point of view) would like to deepen into their mathematical aspects which reads would you recommend?
Is mathematical lattices theory related?
Is topology related?

Since OWL is a description logic, the most relevant branch of mathematics for understanding OWL is logic. Graph theory, lattice theory, and topology are not very relevant (although there are some connections).
Description logics lie between propositional logic and first-order predicate logic. Learning about the syntax and semantics of these two fundamental logical systems will be helpful as background knowledge. This material is covered in any introductory logic textbook.
The book Foundations of Semantic Web Technologies explains the semantics of RDF and OWL in greater mathematical detail than is typical for books about the Semantic Web. For still greater detail, you might look at the Description Logic Handbook (the second edition contains a chapter on OWL). The textbook Knowledge Representation and Reasoning by Brachman and Levesque surveys the whole field of knowledge representation, including description logic.
