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# XML

XML
XML.svg
File extension:.xml
MIME type:application/xml[1]text/xml[2]
Uniform Type Identifier:public.xml
Developed by:World Wide Web Consortium
Type of format:Markup language
Extended from:SGML
Extended to:Numerous, including:
Standard(s):1.0 (Fifth Edition) November 26, 2008; 12 years ago
1.1 (Second Edition) August 16, 2006; 14 years ago

The Extensible Markup Language (short XML) is a markup language like HTML but is extensible. It's created by the World Wide Web Consortium (W3C). XML defines rules for the construction of a document. XML adds context to the information in a document. It does not say how this should be displayed.

Some programs get information out of an XML-document. To do that, they need an API. There are many APIs for XML.

You can write a description of an XML document in a way that is useful for programmers. There are several languages for this; the best known is called DTD.

## Syntax

XML uses less than (<) and greater than (>) to show tags. For example, a paragraph in HTML would be <p>.

A closing tag is a tag used to enclose the value of the tag. The tag has a slash (/) before its name. For example, </p>

A tag which is empty can be represented as an opening tag but with a slash before the >. For example, <p />

## Languages

The following languages are based on XML.

### Images

• SVG (vector graphics)
• X3D (3D modelling language)
• Collada (Language to change informations between different 3D programs)

### Multimedia

• SMIL (Informations with times from multimedia)
• MPEG-7 (for MPEG-7)
• Laszlo (LZX)

### Other

There are a lot more languages that use XML. A couple of them are:

## Sources

1. "XML Media Types, RFC 3023". Internet Engineering Task Force. January 2001. pp. 9–11. Retrieved 2010-01-04.
2. "XML Media Types, RFC 3023". Internet Engineering Task Force. January 2001. pp. 7–9. Retrieved 2010-01-04.