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
a good guide to populating a templates to be filled in when generating an XML document automatically
no longer necessary after the XML editor has been customized

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Web Data Management
Valid XML document means (most appropriate) ?

the document has root element
the document contains atleast one or more root element
Each element must nest inside any enclosing element property
the XML document has DTD associated with it & it complies with that DTD

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