Consider an XML file called intro.xml and a document type definition (DTD) file intro.dtd as follows:
intro.xml
<?xml version = \"1.0\"?> <!DOCTYPE myMessage SYSTEM \"intro.dtd\"› <myMessage> <message>Welcome to XML</message> </myMessage> intro.dtd <! ELEMENT myMessage (message)> <! ELEMENT message (#PCDATA)>
A validating parser will classify intro.xml as
(A)
Well-formed and validated
(B)
Well-formed but not validated
(C)
Validated but not well-formed
Answer: (A)
Explanation:
The difference between well-formed and valid XML is simple: Valid XML has a DTD associated with it and has been verified against all the rules contained in the DTD in addition to being well-formed. Merely well-formed XML, on the other hand, is not necessarily valid, although it may be. In order to know the rules for a well formed document click here
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