Web Data Management
Well formed XML document means ?

it contains a root element
it contains one or more elements
it contain an element
must contain one or more elements and root element must contain all other elements

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Web Data Management
There is a way of describing XML data, how?

XML uses XSL to describe data
XML uses a DTD to describe the data & XML uses a description node to describe data
XML uses a description node to describe data
XML uses a DTD to describe the data

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