WBI is a programmable web proxy and web server. Fancy presentation elements like tables, frames, and images are taken out of the core of the language and wrapped into separate modules so a user's Web-enabled device, like a belt buckle, doesn't choke while trying to render an imagemap. XSL XSL is a language for expressing stylesheets. An XSL stylesheet specifies the presentation of a class of XML documents by describing how an instance of the class is transformed into an XML document that uses the formatting vocabulary. XML Extensible Markup Language, or XML for short, is a new technology for web applications that lets you create your own tags.
Structured information contains both content and some indication of what role that content plays.
XML provides a mechanism to impose constraints on the storage layout and logical structure of the document. XML documents are made up of storage units called entities, which contain either parsed or unparsed data. Parsed data is made up of characters, some of which form character data, and some of which form markup. Markup encodes a description of the document's storage layout and logical structure. XML provides a mechanism to impose constraints on the storage layout and logical structure.