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

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

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

used to direct conversion using an XSLT processor
required when validating XML documents
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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