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
Valid XML document means (most appropriate) ?

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

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