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Re: Teaser with model and bind

From: Erik Bruchez <ebruchez@orbeon.com>
Date: Mon, 17 May 2010 19:11:20 -0700
Message-ID: <AANLkTimE0Jugqpc87n9nHhdawzuRmd-JGgh1dx8BwkD6@mail.gmail.com>
To: Forms WG <public-forms@w3.org>, www-forms@w3.org
Alain & all,

> I tested your teaser (I changed bind/@ref to bind/@nodeset):
>
> EMC Formula: "banana"
> Mozilla extension: "Joe"
> XSLTForms: nothing

Orbeon Forms returns "banana".

> According to XForms 1.1 recommendation,
>
> if the binding element expresses a model attribute that refers to a model
> other than the one containing the context node, then the context node of the
> in-scope evaluation context is changed to be the top-level document element
> node of the default instance of the referenced model, and the context
> position and size are changed to 1.

I think this is the key! Good to point this out.

> [the output Element] cannot bind to element nodes that have element
> children.
> If element child nodes are present, then an xforms-binding-exception occurs.
>
> So, my point of view is that an exception should occur and I'm still proud
> of XSLTForms for not being completely wrong ;-)
>
> It might be easier for developer if context could consist of a node for each
> model... then "Joe" would be displayed, don't you think?

You are right. Although it was not intended in my example that
xforms:output would point to an element containing nested elements!
Here is a version that should produce "Joe":

  http://gist.github.com/404511

> BTW, is there a price to win? ;-)

Unfortunately no price except for the pride of pointing to the right answer ;)

-Erik

>
> -Alain
>
> All,
>
> Here is a little puzzle:
>
> http://gist.github.com/401939
>
> What should the output sow, "Joe", or "banana"?
>
> First, is it clear that it is allowed to refer by id to a bind that
> does not belong to the current model?
>
> If so, since by specifying @model="model1" we are not actually
> changing the model in the sense that there is no ancestor @model
> attribute changing the model, should @model="model1" ensure that the
> nested xforms:output point to a node in model1 rather than model2?
>
> -Erik
>
>
>
>
Received on Tuesday, 18 May 2010 02:42:44 UTC

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