Difference between well-formed xml document and a valid xml document

1.	Difference between well-formed xml document and a valid xml document
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.

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