A collection of element type and attribute names. These element types and attribute names are uniquely identified by the name of the unique XML namespace of which they are a part. 

A formalized, logical expression of the method by which an XML (Extensible Markup Language) document is handled. An XML pipeline is rendered as a series of operations over an XML infoset.

A language for locating data within an XML document based on properties such as location within the document, character content, and attribute values. XPointer consists of a description that comes after the # symbol in a URL.

An application program interface (API) that was first used by Microsoft in version 5.0 of its Internet Explorer Web browser to function as an ActiveX object.

A set of specifications for exchanging news objects such as stories, images, or audio clips in a standard format across different applications and operating systems. XMLNews uses Extensible Markup Language (XML).

A protocol based on Extensible Markup Language (XML) and intended for instant messaging (IM) and online presence detection. It functions between or among servers, and facilitates near-real-time operation. 

The use of a textual syntax to represent MPEG-4 3-D scene descriptions. XMT was designed to provide content authors the ability to exchange their content with other authors while preserving their intentions in the text format. 

An open Extensible Markup Language (XML)-based protocol that specifies a way to establish and manage a universal addressing system. An XNS universal address serves as a permanent contact point for an individual or other legal entity.

A project devoted to the creation of a system for open source network routing. XORP is available without cost. It is script-able and can be used as a production router or a network emulator. It can easily be adapted to VoIP, e-commerce and OLTP.

XPages is a web and mobile application development platform. It allows data from IBM Notes and Relational Databases to be displayed to browser clients on all platforms. The programming model is based on standards and common web development skills like JavaScript, Ajax, the Dojo Toolkit, Server-side JavaScript, and JavaServer Faces. XPages leverages IBM Lotus Domino functionality, like its NoSQL document-oriented database.

A language that describes a way to locate and process items in Extensible Markup Language (XML) documents by using an addressing syntax based on a path through the document's logical structure or hierarchy. 

An attack targeting Web sites that create XPath queries from user-supplied data. If an application embeds unprotected data into an XPath query, the query can be altered so that it is no longer parsed in the manner originally intended. 

A way to locate and filter the elements (data fields) and text in an Extensible Markup Language (XML) document. XQL provides a tool for finding and/or selecting out specific items in the data collection in an XML file or set of files. 

XQuery is a query and functional programming language that queries and transforms collections of structured and unstructured data, usually in the form of XML, text and with vendor-specific extensions for other data formats.

A proposed standard digital rights management (DRM) markup language. The XML-based language enables users to specify rights and conditions associated with resources, such as digital content or Web services. 

A Recommendation of the World Wide Web Consortium (W3C), that specifies how to formally describe the elements in an Extensible Markup Language (XML) document.