DSSSL defines a programming language derived from Scheme, a standard functional programming language. This language is a comprehensive, standardized approach to querying the content of a document, transforming the structure of documents, and providing style to documents. DSSSL support is also incorporated into most open source Linux via the OpenJade tool. The DSSSL Book: An XML/SGML Programming Language provides comprehensive coverage of the language. Its approach is practical with numerous examples and graphics explaining DSSSL concepts. The book covers the structure of a DSSSL document, its programming language, the groves data model, the query language, the transformation language and the style language. Professionals rendering high-quality industrial-strength XML/SGML documents and Linux developers and documentation writers should find this book a useful reference source. Individuals maintaining DSSSL stylesheets, and technical managers in all types of publishing will find in this book a way to give their documents a professional aspect, and a way to automate document processing in a modern way. Readers of the book will learn the necessary concepts to understand the DocBook DSSSL stylesheets and will learn the concepts on how to customize stylesheets. It is assumed that readers will be familiar with SGML.