XMLHttpRequest
Abbreviated as XHR, XMLHttpRequest is a set of APIs that can be used by Web browser scripting languages, such as JavaScript to transfer XML and other text data to and from a Web server using HTTP. XMLHttpRequest works by establishing a communication channel between a Web page’s client-side and server-side. XMLHttpRequest can be used to fetch data in a number of formats including XML, HTML, JSON or plain text. Examples of applications using XMLHttpRequest include Google Gmail and Google Maps. Browsers that support XMLHttpRequest include newer versions of Internet Explorer, Mozilla and Safari.
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- XML data island
Blocks (called islands) of Extensible Markup Language (XML) embedded in an HTML document. Microsoft Internet Explorer 5.0 and newer versions support embedding the XML data inside HTML pages. XML data islands can be accessed from client-side scripts or directly to bound to HTML elements.
- XMPP
Short for Extensible Messaging and Presence Protocol, an open, XML-based protocol for server-to-server near-real-time extensible instant messaging and presence. XMPP is a rival protocol to SIMPLE. XMPP also is known as the Jabber protocol because Jabber is based on XMPP. Jabber is not, however, the only instant messaging application that relies on XMPP.
- XMS
Stands for Extended Memory Specification, a procedure developed jointly by AST Research, Intel Corporation, Lotus Development, and Microsoft Corporation for using extended memory and DOS’s high memory area, a 64K block just above 1MB.
- XM Satellite Radio
A U.S.-based satellite radio provider that offers North American-based services. XM and and competing satellite radio provider, Sirius, merged in 2007 to create a single satellite radio network in the United States and Canada. Since the merger, XM Satellite Radio has been operated by Sirius XM Radio.
- XOR operator
Known as the exclusive OR operator, a Boolean operator that returns a value of TRUE only if just one of its operands is TRUE. In contrast, an inclusive OR operator returns a value of TRUE if either or both of its operands are TRUE.