1.2. The XML Environment
XML (the Extensible Markup Language) is a hugely successful standard from the World Wide Web Consortium (the W3C, at www.w3.org). Mozilla has extensive support for XML, so we briefly review what that standard is good for.
The primary goal of XML is to provide a notation for describing and structuring content. Content is just data or information of any kind. The central XML standards provide a toolkit of concepts and syntax. That toolkit can be used to create a set of descriptive terms that apply to one type of content, like vector graphics. Such a set of terms is called an application of XML. The most well-known XML application is XHTML, which is the XML version of plain HTML.
XHTML describes content that contains text, ...