On Jun 13, 2017, at 9:10 AM, Karl Berry <karl@freefriends.org> wrote:

rm> ... test the full name
(including œפער.œפעשs) first, for a datbase entry. If found, use it.
Otherwise, try again using just the prefix (as at present).

That surely sounds sensible.

Or in case a name is multiply qualified; e.g.,
delta.sc.ipa (occurs in cmu-tipx.enc ) also
omega.sc.ipa q.sc.ipa f.sc.ipa
then drop off the qualifications from the end.
So test in order: delta.sc.ipa delta.sc delta

Ack.

Thanh, can you confirm that we should go ahead with this plan?

The point is that Unicode is not about glyphs, but characters.

This is stated very clearly in the Unicode documentation, and on numerous websites.

Then ‘character’ should be interpreted as 'how a (collection of) glyph(s) is used’.

Thus 'a' and 'a.sc’ are used differently; the latter usually for some form of emphasis,

as in section headings or running headers, rather than the body text.

So it’s not just a matter of a different font style for these words.

It’s quite reasonable for Copy/Paste and screen- or Braille-readers to be able to

detect this difference, via the /ToUnicode map.

Using just the glyph name 'a' is fine as a fall-back, but it should be up to the document

author or package-writer to enrich the full name with a more descriptive Unicode point,

when this is appropriate. At present pdftex prevents it, when using \pdfglyphtounicode .

The only alternative, so far as I can see, is to provide an explicit CMap file, after having

temporarily set \pdfgentounicode=0 when the font is loaded. This is hard to get correct

and to find the right place to hook-in the relevant coding.

Actually, another possibility is editing both the font and its encoding file - - something that

I’m sure we don’t want people doing.

Thanks,
Karl

Hope this helps.

Ross

Dr Ross Moore
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