RE: Re[2]: [cgmo-webcgm] Question about NVDC and APS attributes

[Lofton Henderson <lofton@rockynet.com>]

At 02:17 PM 12/2/2004 +0100, Dieter Weidenbrueck wrote:
>[...]
>
>I think that we decided to allow for setting a view context using a
>setAttribute
>call. The view context should be specified in NVDC to match all other
>coordinates
>used in the DOM context. So the view context became a virtual view context.
>I am not 100% sure, but that's my only recollection.

Beniot has an open issue now, whether we should add region and viewcontext 
to the DTD (i.e., the XCF).

Region and viewContext are already in the DOM, presumably with the proper 
NVDC.  So the presence of virtualViewContext is still unexplained (or is 
redundant).

I suspect that this refers to the effective rectangular region to which 
zoom occurs -- one of three choices depending on the content of the 
metafile and the requested zoom navigation.

Accordingly,
-- it is not an ApsAttr;
-- it must not be DOM-settable.
-- it could be inquirable via a convenience function, or not, depending on 
what we decide now.

For simplicity, I suggest "not" to the latter.  In other words, delete it 
from the DOM chapter.

-Lofton.


>-----Original Message-----
>From: Benoit Bezaire [mailto:benoit@itedo.com]
>Sent: Thursday, December 02, 2004 1:20 PM
>To: CGM Open WebCGM TC
>Subject: Re[2]: [cgmo-webcgm] Question about NVDC and APS attributes
>
>
>Wednesday, December 1, 2004, 8:12:56 PM, Lofton wrote:
>
>LH> At 04:04 PM 12/1/2004 -0500, Benoit Bezaire wrote:
> >>[...]
> >>Second, could someone explain to me what virtualViewContext means?
>
>LH> Huh?  Where did this come from?  Is this something we invented in the
>LH> post-Houston, 11/16 telecon?
>I don't know where it came from; the only thing I remember is that you
>and Dieter understood its meaning.
>
>LH> I wonder if this is the "target rectangle" concept from section 3.2 of
>LH> Dieter's object behaviors proposal, which we discussed in the telecon
>right
>LH> after Houston?
>maybe?
>
>--
>  Benoit   mailto:benoit@itedo.com
>
>LH>
>http://www.oasis-open.org/apps/org/workgroup/cgmo-webcgm/email/archives/2004
>11/doc00001.doc
>
>LH> If so, then I'm pretty sure it should *not* be an ApsAttr.  Therefore,
>it
>LH> shouldn't be in the DOM.  Is this what you would call a "shadow DOM"
>LH> entity?  I can see someone wanting to inquire it, possibly (but let's
>make
>LH> sure there is a strong use case, rather than adding more functions
>LH> gratuitously).  It should not, however, be settable.
>
>LH> -Lofton.