XML underpins many widely used document and data-interchange formats. This chapter surveys four notable XML applications: syndication formats for web content, and markup languages for technical documentation, structured topic-based authoring, and mathematical notation.
RSS and ATOM - XML-based web feed formats for syndicating frequently updated content such as blog entries and news headlines.
DocBook - a presentation-neutral, semantic XML vocabulary for technical documentation.
DITA - the Darwin Information Typing Architecture, an XML architecture for topic-based authoring and publishing.
MathML - Mathematical Markup Language, for representing mathematical notation in XML documents.