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

[vmarchetti at kshell.com]

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> 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 <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 <http://faculty.nps.edu/brutzman>
>  
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