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Re: Questions related to "Add support for default values without the need of an instance element"

From: Erik Bruchez <ebruchez@orbeon.com>
Date: Thu, 13 Mar 2008 10:41:59 -0700
Message-Id: <8512F6DB-F512-4A45-B281-E976A9C170AE@orbeon.com>
To: public-xforms@w3.org

Nick & all,

It would be good if we did not need to introduce a new feature to  
canonical XForms to introduce this, but if we can't, we have two  
obvious choices:

* Drop the feature
* Introduce support for initial values in canonical XForms

Did we ever talk about doing the latter?

-Erik

On Mar 13, 2008, at 6:17 AM, Nick_Van_den_Bleeken@inventivegroup.com  
wrote:

>
> All,
>
> By coincidence I already named the attribute initial-value on the  
> wiki page.
>
> But I  have a problem trying to convert this new feature to a  
> canonical XForms, because:
>
>   - Due to the negative answer on question 'gets reinforced when set  
> to empty' you can't use a simple calculate with an if in the  
> expression
>   - And if we can't use a calculate how can you enforce the initial  
> value when a node is inserted? The xforms-insert Event gives you  
> context info, but enough to identify the initial value(s).
>
> I hope I'm overlooking something...
>
> Nick Van den Bleeken  -  Research & Development Manager
> Inventive Designers
> Phone: +32 - 3 - 8210170
> Fax: +32 - 3 - 8210171
> Email: Nick_Van_den_Bleeken@inventivegroup.com
>
> public-forms-request@w3.org wrote on 03/12/2008 05:20:18 PM:
>
> >
> > Nick, Uli:
> >
> > I also don't think that setting a value to the empty string should
> > cause a default value to be reapplied.
> >
> > More than a "default value", maybe this should be called "initial
> > value".
> >
> > -Erik
> >
> > On Mar 12, 2008, at 5:02 AM, Ulrich Nicolas Lissť wrote:
> >
> > >
> > > Nick,
> > >
> > > please see my comments inline.
> > >
> > > On Wed, March 12, 2008 12:28 pm, Nick_Van_den_Bleeken@inventivegroup.com
> > > wrote:
> > >> All,
> > >>
> > >> While creating the contents for the XForms 1.2 feature "Add  
> support
> > >> for
> > >> default values without the need of an instance element" I ran
> > >> across some
> > >> questions the group has to get consensus on, before I can  
> continue:
> > >>
> > >> Wiki page :
> > >> http://www.w3.org/MarkUp/Forms/wiki/
> >  
> Add_support_for_default_values_without_the_need_of_an_instance_element
> > >>
> > >> If the answer to all the following questions is 'Yes' then I  
> think
> > >> I can
> > >> create a canonical XForms version but I just want to know the  
> group
> > >> beliefs that a positive answer to this questions is desirable:
> > >>
> > >> 1) Does the initial value gets reinforced when the user sets the
> > >> value of
> > >> the control to the empty string? Yes
> > >
> > > No, I don't think so. It would prevent the user from deleting  
> values
> > > on
> > > purpose. The default value should only be reinforced upon xforms-
> > > reset.
> > >
> > >> 2) Does the initial value only gets applied if the initial text
> > >> content of
> > >> the bound node is empty? Yes
> > >
> > > Ok.
> > >
> > >> 3) Does the initial value gets applied when a control is created
> > >> due to
> > >> the insertion of a node and its text content is empty? Yes
> > >
> > > Ok.
> > >
> > >> 4) Does the initial value gets reinforced when the node to  
> which the
> > >> control was bound changes and the text content of the new node is
> > >> empty?
> > >> Yes
> > >
> > > No, see above.
> > >
> > > Regards,
> > > Uli.
> > >
> > >>
> > >> Regards,
> > >>
> > >> Nick Van den Bleeken  -  Research & Development Manager
> > >> Inventive Designers
> > >> Phone: +32 - 3 - 8210170
> > >> Fax: +32 - 3 - 8210171
> > >> Email: Nick_Van_den_Bleeken@inventivegroup.com
> > >>
> > >> --------------------------------------------------
> > >>
> > >> Inventive Designers' Email Disclaimer:
> > >>
> > >> http://www.inventivedesigners.com/email-disclaimer
> > >>
> > >>
> > >
> > >
> > >
> >
> > --
> > Orbeon Forms - Web Forms for the Enterprise Done the Right Way
> > http://www.orbeon.com/
> >
> >
> Inventive Designers' Email Disclaimer:
> http://www.inventivedesigners.com/email-disclaimer
>
>

--
Orbeon Forms - Web Forms for the Enterprise Done the Right Way
http://www.orbeon.com/
Received on Thursday, 13 March 2008 17:43:03 UTC

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