[cddlm] revised CDL document

[Jun Tatemura]

Hi Steve,
Thank you for having a look at the spec.

The requirement from SmartFrog was to emulate SmartFrog's concatenation
of vectors, for instance, concatenating [1,2] and [3,4] as [1,2,3,4].
In CDL this is implemented as follows:

<Vector1><A>1</A><A>2</A><A cdl:ref="/Vecor2/A"/></Vector1>
<Vector2><A>3</A><A>4</A></Vector2>
or
<NewVector><A cdl:ref="/Vector3/A"/><A cdl:ref="/Vector4/A"/></NewVector>
<Vector3><A>1</A><A>2</A></Vector3>
<Vector4><A>3</A><A>4</A></Vector4>

However, @cdl:ref cannot do the following concatenation <cdl:ref> can do

<a><b>1</b><cdl:ref ref="/c" /></a>
<c><d>2</d><e>3</e></c>
-->
<a><b>1</b><d>2</d><e>3</e></a>

If we really need this type of concatenation (I would say insertion 
instead of concatenation),
I need to bring back <cdl:ref> to the spec. We can still do that without 
impacting the other
parts of the spec.

Best Regards,
Jun

Steve Loughran wrote:

> Jun Tatemura wrote:
> > Dear CDDLM team and Hiro,
> >
> > Please find the attached draft of CDL spec, which has been
> > revised based on Hiro's comments. I am sorry for taking this long time
> > for revision.
> > The attached PowerPoint file gives highlights on this revision.
> > In addition to incorporating Hiro's comments, I added description that
> > clarifies the CDL's behavior when properties are duplicated (i.e., 
> there
> > are
> > multiple properties with the same name in the same property list). 
> Since
> > the Component
> > Model uses duplicate properties, we had a discussion on the
> > clarification several months ago.
> > I took this opportunity of revision to incorporate that discussion.
> > Please see the slides
> > for details.
>
> I'm going to take a look at seeing what the implications for this 
> change are; ideally coding up support for it.
>
> Overall I like the idea, but worry about
>
>  -how we support the use case of appending to an existing list
>  -what the implications are for complex references
>
> What is the timescale for acting on the document. Is this something to 
> be submitted before GGF, or is it something we can talk about there?
>
> -steve