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Re: More on datatype validation: what's a possible algorithm? (PR#86)

From: John Boyer <xforms-issues@mn.aptest.com>
Date: Wed, 17 Oct 2007 19:11:50 -0500
Message-Id: <200710180011.l9I0BorK019699@htmlwg.mn.aptest.com>
To: ebruchez@orbeon.com
CC: public-forms@w3.org, www-forms-editor@w3.org

Hi Erik,

At the last face-to-face meeting, the working group resolved to nullify the
offending action item you mentioned below, so the spec change that would result
in the problems you identify below will not be made.

We trust that this satisfies your last call comment.

Thank you,
John Boyer

> 
> All,
> 
> Let's continue with some schema questions. As discussed in this
> thread:
> 
>     http://lists.w3.org/Archives/Public/public-forms/2007May/0074.html
> 
> there is a pending action item to amend the spec so that "revalidate
> only perform validation of datatypes, not structural validation,
> *except* during submission".
> 
> Now I am just wondering how an implementation can do this. If you
> assign datatypes with xforms:bind or xsi:type, then it is quite
> easy.
> 
> Now if you don't have those, but the types come directly from the
> schema, what do you do?
> 
> Let's say I define a simple type like this in a schema:
> 
> <xs:simpleType name="state">
>           <xs:restriction base="xs:string">
>               <xs:enumeration value="AL"/>
>                 ...
> 
> I just wouldn't know what nodes in the document have this type. Of
> course, I know it if I write in my schema:
> 
> <xs:element name="state" type="dmv:state"/>
> 
> But this may or may not be a top-level definition in my schema. If it
> is, then I can assume that any element called "state" will have type
> state. So I validate the content of the element and there is no
> problem.
> 
> What if this is not a top-level definition? Should an implementation
> do the following:
> 
> 1. Do a full validation.
> 2. While doing so, annotate nodes with appropriate type information.
> 3. Use that type information during revalidate.
> 
> But then, what happens if you do any of the following:
> 
> * xforms:insert
> * submission with instance replacement
> 
> The newly created nodes won't have any type information associated
> with them, unless you do a full revalidation. So should we expect that
> full validation occurs "when needed" to determine node types?
> 
> Or am I missing something?
> 
> Feedback would be appreciated on this.
> 
> -Erik
> 
> -- 
> Orbeon Forms - Web Forms for the Enterprise Done the Right Way
> http://www.orbeon.com/
> 
> 
Received on Thursday, 18 October 2007 00:14:16 GMT

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