Question

what is the xml ? is it different from html ?

Answer 1

XML is an extensible markup language. XML can be pretty much anything. You can define schema rules, layouts, transformations etc. HTML is a sub form of xml that is used for detailing and designing web pages. HTML is interpreted by web browsers. XML can also be used also known as XHTML.

Answer 2

Do a search on about.com for web design it explains it very clearly or wikipedia is also a good source

Answer 3

HTML is not a sub spec of XML. XML and HTML are subspecs of SGML. XHTML is a subspec of XML with HTML-like elements.

Answer 4

HTML is just completly easier and simpler, and can be used almost in any website. If you want to learn http://www.w3schools.com/xml/default.asp


XML stands for EXtensible Markup Language
XML is a markup language much like HTML
XML was designed to carry data, not to display data
XML tags are not predefined. You must define your own tags
XML is designed to be self-descriptive
XML is a W3C Recommendation

AND

HTML stands for Hyper Text Markup Language
HTML is not a programming language, it is a markup language
A markup language is a set of markup tags
HTML uses markup tags to describe web pages
HTML documents describe web pages
HTML documents contain HTML tags and plain text
HTML documents are also called web pages


SO IN SUMMARY:

The Difference Between XML and HTML

XML is not a replacement for HTML.
XML and HTML were designed with different goals:

XML was designed to transport and store data, with focus on what data is
HTML was designed to display data, with focus on how data looks
HTML is about displaying information, while XML is about carrying information.

Answer 5

XML stands for eXtensible Markup Language.
XML is designed to transport and store data.
XML is important to know, and very easy to learn.

How XML syntax differs from HTML

New tags may be defined at will
Tags may be nested to arbitrary depth
May contain an optional description of its grammar

I suggest not to use xml rather use YAML
here is why http://webignition.net/articles/xml-vs-yaml-vs-json-a-study-to-find-answers/