XML-Extended Markup Language

XML-Extended Markup Language (Extended Markup Language)
XML is a cross-platform tool for communicating information and independent software and hardware.

XML Document instance

<?xml version="1.0"?>

< note >

< to > Tove </ to >

< from > Jani </ from >

< heading > Reminder </ heading >

< body > Don't forget me this weekend! </ body >

</ note >

What is XML?
XML semantic extended markup language (extended markup language)

XML is designed to describe data
XML tags are not predefined. You need to define your own label.
Describe the data using an XML document type declaration (DTD) or XML schema.
DTD or XML Schema and XML are designed to self-describe.
XML is a W3C standard

XML does nothing
ML is doing nothing. Create, store and communicate XML structures.

In the example of the above XML document, the paper is written in XML by Jani Tobero. Note the subject and message body. It also has information about where it came from. However, this XML document does nothing. Wrapped up in XML tags, it just provides pure information. Someone must write a piece of software to receive, display, or send:



MESSAGE
To: Tobe
From: Jani

Don't forget this weekend for me!

XML tags are not predefined


HTML tags for displaying documents can only be used by predefined HTML file writers to use HTML standards (eg <P>, <H1>, etc.) in custom labels.

XML allows authors to define his / her own label and his / her own document structure.

In the example above (same <e> and <of>), the tags are not defined in the XML standard. The tag is the author "invention" of the XML document.

View directory XMLCD

See XML factory catalog

See XML food menu

How to learn XML?
We study the complete XML tutorial

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