Broad introduction to XML and its role in technical communication. It describes the basics of XML syntax and terminology, the use of XML in technical communication and the advantages it can bring to the production of technical documentation of all types. It introduces the key XML languages that are used for technical documentation, both as documentation source formats and for transforming source documents to various output formats. For anyone who needs a fast introduction to XML and its role in technical communication, such as those whose organization is deploying an XML-based documentation solution, or freelancers who need to keep pace with technical trends. It caters for technical communicators of all levels of markup language experience, providing a comprehensive yet easy to read overview of the use of XML in technical communication, as well as references to more in-depth material. This ed includes a section about S1000D, used in the aerospace and defence industries.