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From Sylvain Wallez <>
Subject Re: Client side validation
Date Mon, 22 Nov 2004 22:49:04 GMT
Luca Garulli wrote:

>In theory we can have some JS script that can be usable in client AND
>server sides. If these scripts contains no dependencies with
>flowscript objects (cocoon, etc) and Java code we can deploy to both

Considering that the object model are very different in the form and in 
the client, that seems difficult to me.

>However what I'd like to see is to reuse the validation rules in the
>form-definition. Implementing "assert" is much more difficult. As
>Sylvain wrote, should be quite simple to implement three kinds of
>validations: check on field presence, basic format checks and a custom
>This should cover the 90% of user requirements.
>We need this feature soon, so I've thinked to write a transformer that
>enrich the form instance with javascript functions (Decorator Pattern)
>and can be placed in the pipeline just before the final XSL.

Please consider my proposal of having validators output an XML fragment 
that is later transformed to JS by the presentation stylesheets. It 
would just require to upgrade the XSLs.


Sylvain Wallez                                  Anyware Technologies 
{ XML, Java, Cocoon, OpenSource }*{ Training, Consulting, Projects }

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