لغة xml,الهدف منها , موقعها في J2EE

ال xml هي موااااااااااااااال يطول شرحه (هههههههههههههههه)

xml used to store data in a portable format that can be used across-platform.

xml is a meta-langauge; a lang that used to create a markup languages.

xml is a subset of SGML , on the other hand, html is an implementaion of SGML.

for example rtf, is a format by (MS as i think ) it used to store data but not a standard, but xml is a standard by http://w3.org.

xml elements is user-defined as the opposite of html.

ex:

<? xml version="1.0"?>

<root>

<emp>

<name> mohammed</name>

<salary value=1000 />

</emp>

</root>

as you show, it is my own elements.

there are major topics in xml you should know:

- well-formedness

- validness

check this greate , easy-to-learn book :

sams publishing: learn your self xml in 21 days.

== about usage in java ee , i think in making web-services...

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