adding new tags without error on DTD check

lauzon at lauzon at
Wed Aug 18 22:23:24 BST 1999

To be a valid XML document, each tag that exists must correspond to a tag in the
DTD.  So if you add a tag which does not exist on the DTD, you will no longer
have a valid XML document.  You could, however, still have a well-formed
document if you added the tag in a well-formed manner.  So you could attempt to
validate the given document, but the response should be that the document is not

Shawn Lauzon

Does anybody out there know if:

1.  you have a well-formed xml file that you are parsing and validating.
2.  a dtd file that validates the current xml file it is checked against.

If you add a new tag that is not part of the DTD description, will an error
result be given showing the the xml file is unable to be validated?


Adam Eyler

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