Question

What is the difference between well-formeches and validity of an XML document?​

Answer 1

Answer:

Valid XML is XML that succeeds validation against a DTD. Well formed XML is XML that has all tags closed in the proper order and, if it has a declaration, it has it first thing in the file with the proper attributes. In other words, validity refers to semantics, well-formedness refers to syntax.

Answer 2

Answer:

The difference between well-formed and validity 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.

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