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XML

See Extensible Markup Language.

XML data island

An XML document (<XML> or <SCRIPT language="XML">). that exists within an HTML page. It allows you to script against the XML document without having to load it through script or through the <OBJECT> tag. Almost anything that can be in a well-formed XML document can be inside a data island. HTML is used as the primary document or display format, and XML is used to embed data within the document. XML data islands are supported by Internet Explorer 5 and higher.

XML Data Source Object

Provides a way to bind HTML controls directly to an XML source file. It assists developers in connecting to structured XML data and supplying it to an HTML page by using the data-binding facility of dynamic HTML. The XML data source object allows you to work with data one node at a time, but you can also work with multiple nodes at a time, without having to walk the document tree. It binds the data to specific controls on the page and the controls are automatically populated with data from the data source object.

XML DOM

See Document Object Model (XML definition).

XML namespace

A mechanism to resolve naming conflicts between elements in an XML document when each comes from a different XML vocabulary; it allows the commingling of like tag names from different namespaces. A namespace identifies an XML vocabulary defined within a Uniform Resource Name. An attribute on an element, attribute, or entity reference associates a short name with the URN that defines the namespace; that short name is then used as a prefix to the element, attribute, or entity reference name to uniquely identify the namespace. Namespace references have scope. All child nodes beneath the node that specifies the namespace inherit that namespace. This allows nonqualified names to use the default namespace. See also RDF namespace.

XML schema

A formal specification of element names that defines the structure of an XML document, including which elements can appear, the sequence of their appearance, the number and placement of child elements, and whether an element is empty or can include text. The schema can also define default values for attributes and provide for extended functionality such as data typing, inheritance, and presentation rules. Unlike a DTD, which requires its own syntax, an XML schema is written in XML.

XML vocabulary

A set of actual elements and the structure for a specific document type used in particular data formats. XML vocabularies, along with the structural relationships between the elements, can be defined in a DTD or a schema that serves as the rulebook for that vocabulary. One of the first and probably most well-known vocabularies is the Channel Definition Format used to define Web pages that are designed to be sent automatically, or "pushed" to client users.

XSL

See Extensible Stylesheet Language.

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