This series provides an introduction to the Extensible Markup Language (XML) and its general format. It introduces the fundamentals of XML, including how to read a basic XML document, the XML document structure, and viewing XML source documents. It shows how to build an XML data document, including creating elements and element modes, naming XML objects, and creating declarations and well-formed documents. Building DTDs is explained in detail, along with creating and managing internal, external, and parameter entities. Additional topics covered in this series include a detailed discussion of the Document Object Model, Cascading Style Sheets (CSS), and XSL Style Language.