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

[Benoit Bezaire <benoit@itedo.com>]

Hi Lofton,

Either one (alt 1 or alt 2) is fine with me. I do agree that
redefining an existing attribute would cause some problems for
existing content (we don't want that).

-- 
 Benoit   mailto:benoit@itedo.com

 
Monday, June 13, 2005, 12:51:00 PM, Lofton wrote:

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

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

LH> VIEWPORT topx topy botx boty
LH> This should no longer use VDC coordinates but NVDCinstead.


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

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

LH> (Note:  I'm not proposing "change VDC to NVDC forVIEWPORT",
LH> because I think it's a bad policy to make changes thatbreak
LH> existing content.)

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

LH> Regards,
LH> -Lofton.