"Foundations of the Semantic Web: XML, RDF, & Ontology" proceeds from a broad-spectrum discussion of the Semantic Web and progresses through various technologies such as XML, XML Schema, XPath, RDF, RDF Schema frameworks, Ontology, and then delivers current applications and potential future developments. The sequence builds in line with Tim Berner - Lee's layer cake diagram and explains concepts clearly. Each chapter ends with interesting exercises and "Further Readings" section that lists advance reference pointers.