OASIS Mailing List ArchivesView the OASIS mailing list archive below
or browse/search using MarkMail.

 


Help: OASIS Mailing Lists Help | MarkMail Help

cgmo-webcgm message

[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index] | [List Home]


Subject: RE: [cgmo-webcgm] ISSUE: change VDC to NVDC in OBJECT?


We should take a quick poll whether any vendor has actually implemented this functionality. We have not thus far.
 
IMO, there is very little chance to break any content without viewers in the market that supported this feature in the past.
 
If we don't want to change things, I suggest we deprecate this param instead. It becomes useless in the future, because internally
we all will be calculating with NVDC only.
-----Original Message-----
From: Lofton Henderson [mailto:lofton@rockynet.com]
Sent: Monday, June 13, 2005 6:51 PM
To: cgmo-webcgm@lists.oasis-open.org
Subject: [cgmo-webcgm] ISSUE: change VDC to NVDC in OBJECT?

From Dieter's comments:
http://lists.oasis-open.org/archives/cgmo-webcgm/200506/msg00021.html

ISSUE:  should 2.0 change VDC to NVDC in the VIEWPORT 'param' sub-element of the 'object' element?

VIEWPORT topx topy botx boty
This should no longer use VDC coordinates but NVDC instead.

DISCUSSION.  We have defined NVDC to be the coordinate system of DOM transactions with the metafile.  WebCGM 1.0 defined VDC to be the coordinates to used for VIEWPORT 'param' sub-elements of the 'object' element, in HTML content.  Changing the specification for 2.0 would mean that any 1.0 HTML documents would break with a 2.0 viewer.

Alternative 1.  Leave 1.0 specification as is (VDC) for 2.0.
Alternative 2.  Define a new 'param', VIEWPORTN, with NVDC coordinates and deprecate the VIEWPORT (VDC) 'param'.

(Note:  I'm not proposing "change VDC to NVDC for VIEWPORT", because I think it's a bad policy to make changes that break existing content.)

RECOMMENDATION:  Alt.1 -- leave it as is.

Regards,
-Lofton.









[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index] | [List Home]