A reformulation of HTML 4.0 as an application of the Extensible Markup Language (XML). In XHTML, all HTML 4 markup elements and attributes are supported. XHTML can be extended by anyone that uses it. 

Xiaomi, a chinese electronics company, based out of Bejing, is the 3rd largest smartphone distributor in the word. It designs, develops and sells smartphones, mobile apps and consumer electronics. The flaghsip products include Xiaomi Mi series smartphones and Xiomi Powerbanks.

A smartphone by Xiaomi Tech, a Chinese mobile phone company. It will run on MIUI ROM based on Android's Jelly Bean operating system.

Xiaomi Mi5, the successor of Mi4 is an Android smartphone powered by a Qualcomm Snapdragon 805  processing with a internal memory capacity of 3GB (RAM) and 32GB (storage) and processing speed of 2.7 GHz. It boast of 16 MP primary camera with LED Flash and 8MP secondary camera.

A middleware product that manages InterProcess Communication (IPC) across programs in a network. XIPC allows a programmer to use these IPC methods across processes that are distributed in different locations in a network.

A type of connector for notebook computer modem that allows a standard telephone connector to snap into the modem.

A  proposed use of the XML that is intended to provide a standard way for programmers and other users using the UML with different languages and development tools to exchange information about metadata. 

A flexible way to create common information formats and share both the format and the data on the World Wide Web, intranets, and elsewhere. 

A small but dangerous message that is composed and sent with the intent of overwhelming the program that parses XML files. When the XML parser tries to process an XML bomb, the data feeds on itself and grows exponentially. 

Extensible Markup Language (XML) is a markup language that defines a set of rules for encoding documents in a format that is both human-readable and machine-readable. Many application programming interfaces (APIs) have been developed to aid software developers with processing/converting XML data, and several schema systems exist to aid in the definition of XML-based languages.

An application for processing Extensible Stylesheet Language Transformation (XSLT) in an XML file. It is essentially an API to an XML parser and the XPath processor. XML Core Services works in conjunction with Internet Explorer. 

XML Developer Certificate by W3Schools

A specification for an abstract model of an Extensible Markup Language (XML) document. The specification contains a consistent set of definitions for use in other specifications relevant to the data in XML documents.

XML Master Basic by XML Master Certification

XML Master Professional Application Developer by XML Master Certification

XML Master Professional Database Administrator by XML Master Certification