XML with correct syntax is "Well Formed" XML.
XML validated against a DTD is "Valid" XML.
A "Well Formed" XML document has correct XML syntax.
The syntax rules were described in the previous chapters:
A "Valid" XML document is a "Well Formed" XML document, which also conforms
to the rules of a Document Type Definition (DTD):
The DOCTYPE declaration in the example above, is a reference to an external DTD file. Content of
the file is shown in the paragraph below.
The purpose of a DTD is to define the structure of an XML document. It defines the structure with
a list of legal elements:
W3C supports an XML-based alternative to DTD, called XML Schema:
To help you check the syntax of your XML files, we have created an XML validator to syntax-check
Please see the next chapter.
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