Web Data Management
The use of a DTD in XML development is ?

required when validating XML documents
used to direct conversion using an XSLT processor
no longer necessary after the XML editor has been customized
a good guide to populating a templates to be filled in when generating an XML document automatically

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

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

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