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From Torsten Curdt <>
Subject RE: Cocoon Form binding and validation [was: RE: SchemoX forms]
Date Tue, 26 Mar 2002 11:52:50 GMT

> > As long as your stylesheet takes an instance (inserted in the XForms
> > document from a JavaBean or DOM node through
> > CastorTransformer or a flat XML
> > file) and renders HTML Form with element names which
> > correspond to the XPath
> > locations of the instance elements, then I think it can be a
> > perfect match
> > to the CocoonForm toolkit I built in the last few
> > weeks. It will be probably a good fit for Torsten's framework
> > which we'll
> > eventually integrate with.
> > Appears that your current work is very close to achieving that.
> I'll further my work on that (although, I can be back to my paid work at any
> time and I don't want to leave unfinished stuff).
> If Torsten's work in CVS then I'll take a look at it.

Sure... please take a look :)

and please read the README

So might also want to try the examples...


> If it supports dependecy checks then 'yes'. An example: is it possible to
> implement such a validation rule "validate 'car-model' required field only
> if the user indicated that he owns one (has set 'has-car' field to true)"?

That's what I like to see, too. Although I doubt you can express this
within a XSD, can you?

I know most people don't like "homegrown" standards that's why I made the
validation pluggable in my approach. So anyone can easily come up with
what he needs but still support the current "standard" validations.

As a demo validation I came up with the "easyrelax" validation... Although
it's just an example I have to admit I like it more and more :)

> > It would be cool if Berin (as an ExFormula developer) and the
> > folks who
> > build Chiba participate in this discussion.
> > They've already spent a significant amount of effort on this problem.

...that's would be great...

> > If we're to solve it and bump Cocoon to the level of Struts
> > and the next
> > generation Java Server Faces based app servers, we need their help.
> We need to create a small but real-life sample application and we will
> achieve the level of Struts. Haven't look at JSF, but it's based on Struts,
> isn't it?

Can you give a link for the JSF?

> So, let's start work on a web app now! Your work fills me with enthusiasm ;)

Ivelin and me thought it would be a good idea to have a feedback wizard as
sample application. So people install cocoon and they are asked a few
questions (what system, how the installation went etc.) and the feedback
can be registered somewhere. We then could create some statistics with
SVG on the cocoon website maybe :)

We compiled some requirements for such an sample application:
* should at least 3 pages with a summary as last page
* should be full i18n. the browser locale should be taken as default
  locale for the application. not only the labels but also the constraints
  and error messages should be localized
* all types of HTML controls should be used
* you should be able to navigate through the wizard with "next" and "prev"
* as little java programming as possible should be necessary to create simple
* use the MVC pattern

Hope I haven't forgotten anything...

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