RELAX NG (pronounced relaxing), Regular Language Description for XML Core - New Generation is quickly gaining momentum as an alternative to other schema languages. Designed to solve common problems raised in the creation and sharing of XML vocabularies, RELAX NG is less complex than The W3C XML Schema Recommendation and far more powerful and flexible than DTD. RELAX NG is a grammar-based language that both schemes are easy to learn for schema creators and easy to implement for software developers In RELAX NG, developers are introduced to this unique language and will learn no-nonsense method to create XML schema. RELAX NG covers the following topics in depth: Introduction to RELAX NG Building RELAX NG schema uses XML syntax Building RELAX NG schema uses a compact syntax, an alternative non-XML syntax Flattening scheme to limit depth and provide reusability Using external datatype libraries with RELAX NG W3C XML Schema regular expressions Writing extensible schema Annotating scheme Generating schemes form a variety of sources Determinism and datatype assignment and much more.