[x3d-public] illegal characters in X3D Architecture Table 41.5

Wed Sep 8 06:02:06 PDT 2021

Thanks for checking Vince, concur. Dick will probably want — mdash for complying with ISO editorial rules.

v/r Don
________________________________
From: vmarchetti at kshell.com <vmarchetti at kshell.com>
Sent: Wednesday, September 8, 2021 3:42:02 AM
To: Brutzman, Donald (Don) (CIV) <brutzman at nps.edu>; X3D-Public <x3d-public at web3d.org>
Subject: Re: [x3d-public] illegal characters in X3D Architecture Table 41.5

NPS WARNING: *external sender* verify before acting.

I examined   file X3D/ISO-IEC19775/ISO-IEC19775-1/ISO-IEC19775-1v4.0/ISO-IEC19775-1v4-CD1/Part01/components/volume.html from github.
The xml header line declares the encoding of utf-8, as does the html meta tag, charset field

Line 904 is the first data row of table 41.5
<td>S ???? luminance (L)</td>
where ???? denotes the garbled bytes.

Examining a hex dump, the 4 bytes between the space following 'S' and the space preceding 'l' are:
0xEF 0xBF 0xBD 0x3F

0xEF is a byte used in byte-order-marks in different encodings, but it is incorrect to have it in the middle of a file.
I have tried without success to decode these 4 bytes and portions of this byte-list in utf-8 and utf-16 ; the only success is that
the final byte, 3F, is the question mark in ascii.

I propose the way forward is to decide what character we want to put in these table rows , and a dash would be fine, and make the edit.

Vince Marchetti

On Sep 7, 2021, at 10:07 PM, Brutzman, Donald (Don) (CIV) <brutzman at nps.edu<mailto:brutzman at nps.edu>> wrote:

For Mantis 899, hoping someone can discern correct values for garbled characters in

  *   https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Part01/components/volume.html#t-transferFunctionTextureCoordinateMapping
  *   Table 41.5 — Transfer function mapping from texture type to texture coordinate

Am thinking they might be quite simple, mdash or hyphen perhaps…

all the best, Don
--
Don Brutzman  Naval Postgraduate School, Code USW/Br       brutzman at nps.edu<mailto:brutzman at nps.edu>
Watkins 270,  MOVES Institute, Monterey CA 93943-5000 USA   +1.831.656.2149
X3D graphics, virtual worlds, navy robotics http://faculty.nps.edu/brutzman

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