Xml: Markup language by the W3C for encoding of data
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.
 | |
| Filename extension | .xml |
|---|---|
| Internet media type | |
| Uniform Type Identifier (UTI) | public.xml |
| UTI conformation | public.text |
| Developed by | World Wide Web Consortium |
| Type of format | Markup language |
| Extended from | SGML |
| Extended to | Numerous, including: XHTML, RSS, Atom, KML |
| Standard | 1.0 (Fifth Edition) November 26, 2008 1.1 (Second Edition) August 16, 2006 |
| Open format? | Yes |
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 .
A closing tag is a tag used to enclose the value of the tag. The tag has a slash (/) before its name. For example,
A tag which is empty can be represented as an opening tag but with a slash before the >. For example,
The XML specification defines a valid XML document as a well-formed XML document which also conforms to the rules of a Document Type Definition (DTD).
Languages
The following languages are based on XML.
Text
- XSL-FO
- DocBook
- DITA
- XHTML (HTML based on ALL)
- TEI (Text Encoding Initiative)
- NITF (News Industry Text Format)
Images
- SVG (vector graphics)
- X3D (3D modelling language)
- Collada (Language to change informations between different 3D programs)
Earth
- Geography Markup Language (GML)
- GPS Exchange Format (GPX): XML for GPS informatons
- Keyhole Markup Language (KML): coordinates for Google Earth
- OpenImmo : XML for Houses with position informations
Multimedia
- SMIL (Informations with times from multimedia)
- MPEG-7 (for MPEG-7)
- Laszlo (LZX)
Safety
- SAML (describe and send informations about safety)
- XML Signature
- XML Encryption
Other
There are a lot more languages that use XML. A couple of them are:
- RSS
- WAP/WML
Sources
Other websites
- XeML.net Archived 2018-03-16 at the Wayback Machine
- W3C XML Page
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