In many cases, XMLmind XML Editor (XXE) provides validation error
messages with enough detail that a user can determine how to correct
the problem. For example, if you open an XHTML document with an `a`
tag in the `body`, XXE will correctly complain that 'element cannot
contain element "a" [cvc-complex-type]'. In some cases, though, the
error messages do not provide enough information. I ask that where
possible, some types of validation error messages provide more detail
as to the nature of the problem. I list two examples below.
In one case, a schema restricts a particular element to only have
content of type `xsd:date`. If a user enters an incorrect date, XXE
will report the problem as 'bad character content for element'. I ask
that this be modified to something like 'bad character content for
element; expected xsd:date', possibly including a hyperlink to the XML
Schema Datatypes definition for `xsd:date`. If XXE wanted to take
extra steps, it could even provide a summary of the necessary lexical
format of the data.
Another general case exists when an element is missing a required
child element. In such a case, XXE will report the problem as
'required elements missing'. It would be very useful if a list of the
required elements could be included in this message.
Thank you for your consideration.
Take care,
John L. Clark
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