XML
The Extensible Markup Language (XML for short) is a markup language like HTML, but built to be extensible,[3] and was 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.[4] There are many APIs for XML. JSON was built to replace this purpose of 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/> (or <p />)
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).[5][6]
Languages
The following languages are based on XML.
Text
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:
Sources
- ↑ XML Media Types, RFC 3023 (January 2001)Internet Engineering Task Force. p. 9–11. Retrieved 2010-01-04.
- ↑ XML Media Types, RFC 3023 (January 2001)Internet Engineering Task Force. p. 7–9. Retrieved 2010-01-04.
- ↑ What is an XML-File? | Data Basecamp (in en-US) (2022-08-20). Retrieved 2022-09-25.
- ↑ What is an API? Easily explained! | Data Basecamp (in en-US) (2022-07-23). Retrieved 2022-08-11.
- ↑ XML Notepad. Retrieved 16 November 2017.
- ↑ XML Notepad 2007. Retrieved 16 November 2017.
Other websites
- XeML.net Archived 2018-03-16 at the Wayback Machine
- W3C XML Page
