Hi,

This post was very useful. I've been having a look-alike trouble that
maybe you could help. I've extended some XHTML tags to add an form
validation functionality in the client side (implemented with javascript
). I’ve created a set of attributes that indicates what kind of
validation check is needed for the form field before it was submitted to
the server. Like this:

<input type="text" v:type="email" />
<input type="text" v:type="name" />

Then a javascript function processes all the tags and validates the form
accordingly to the v:type attribute. 

Everything was fine. All the modern desktop browsers supported the
extension, but that’s not enough for the project I’ve been working on.
The code must be validated by some XHTML validators around the web. The
code validation is required for "quality of the product" reasons. These
validators were complaining about the invalid/unspecified attribute used
in the <input /> tag.

So I’ve created a Schema for the "v" namespace. The problem is: I've
tried to extend the XHTML specification and turn the code into a valid
XML document (the input tag must be expecting a possible v:type
attribute occurrence) . I found it was a hard task to conclude.

So, can you give me suggestions of a painless way for doing it? And what
validation engines support such schema extension?

Thanks!


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