Re: The load Element, and more

On Tue, 12 Mar 2019 19:23:39 +0100, Erik Bruchez <ebruchez@orbeon.com>  
wrote:

> All,
>
> In "14.21 The load Element" [1], I don't think it is clear what to do if  
> there is a single-item binding but the binding resolves to the >empty  
> sequence.
>
> Arguably the binding is then "present", so the action would NOT fallback  
> to the `resource` attribute or element.
>
> XForms 1.1 clearly said that the action would have no effect in this  
> case. [2]
>
> So: no effect, or error, or fallback to `resource`?

Good question. I'll put it on the agenda.

> Incidentally, it also said that the action would have no effect if both  
> ways of specifying are there: "If the Single Node Binding is >given in  
> addition to one of the resource attribute or resource element, then the  
> action has no effect." This was removed too, for some >reason.
>
> Related, my reading of the XForms 2.0 text for "the output Element" [3]  
> seems to allow `value` AND `ref`, which would then require >`value` to  
> evaluate in the context of the single-node binding. Am I right?
Yes, and there are actually examples given in the spec, for instance in  
6.2.3

https://www.w3.org/community/xformsusers/wiki/XForms_2.0#Element_evaluation_context

>
> If so, it could make sense for `xf:load` to allow evaluating its  
> `resource` attribute, which can be an AVT, in the context of its  
> >single-node binding as well, since I think that's what we ended up  
> deciding.

Worth discussing.

Steven

>
> -Erik
>
> [1]  
> https://www.w3.org/community/xformsusers/wiki/XForms_2.0#The_load_Element
> [2] https://www.w3.org/TR/xforms11/#action-load
> [3]  
> https://www.w3.org/community/xformsusers/wiki/XForms_2.0#The_output_Element