[MPEG-OTSPEC] Does a rendering system know if a variation selector requested glyph is not available in a font?

[William_J_G Overington]

Thank you.
 
Interestingly I noticed today in the Unicode Current Documents Register 
web page the following document title, though the document is not posted 
at the time of writing this post.
 
Proposal to Encode a Set of 128 User-Defined Variation Selectors (WG2 
N5266)
 
However, searching for WG2 N5266 did find a document.
 
https://www.unicode.org/wg2/docs/n5266-UVS_Proposal.pdf 
<https://www.unicode.org/wg2/docs/n5266-UVS_Proposal.pdf>
 
So using Variation Selectors could, if the proposal is accepted, become 
a much more attractive proposition for researchers.
 
It did occur to me that, in my opinion, it would be better to encode 256 
User-Defined Variation Selectors.
 
William Overington
 
Friday 21 June 2024
 
 
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