Welcome to the forum.
Well it's not quite in the same league as asking for a simple
guide to splitting the atom but it's that sort of question.
Think of XML as HTML where the tags are structured and give a
sort of database effect. That enables the content to be reused.
It's also one of those things where if you needed it, you
would sort of know. Your developers would be steering you that way.
Probably someone can give you a better answer but meantime
you would do very well to look at
http://www.xml.com and do some
googling.
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