What does xml mean?

The full name of XML is EXtensible Markup Language, which is translated as extensible markup language, extensible markup language or extensible markup language. It is a markup language.

The predecessor of XML is SGML (The Standard Generalized Markup Language), which is GML (Generalized Markup Language) developed by IBM since the 1960s.

Like HTML, XML (can Extensible Markup Language) is a subset of the Standard General Markup Language (SGML), which is a standard for describing the content and structure of data on the Internet. However, XML is not like HTML. HTML only provides a general method for displaying information on the page (without context-sensitive and dynamic functions). XML gives context-sensitive functions to data. It inherits most of the functions of SGML, but uses Less complex technology. .

In order to make SGML user-friendly, XML redefines some internal values ??and parameters of SGML and removes a large number of rarely used functions. These complicated functions make SGML complicated when designing websites. change. XML retains the structural functions of SGML, which allows website designers to define their own document types. XML also introduces a new document type, so that developers do not need to define document types.

Because XML was developed by W3C, the standardization work of XML is responsible for the XML working group of W3C. The members of this group are composed of experts from various places and industries. They exchange opinions on XML standards through email, and Give your opinion (www.w3.org/TR/WD-xml). Because XML is a public format (it does not belong to any one company), you don't have to worry about XML technology becoming a profit tool for a few companies. XML is not a language attached to a specific browser.