https://search.law.villanova.edu/Record/.b1245776 and a Villanova Law?

There's a copy at a German research institute's library https://julib.fz-juelich.de/vufind/Record/16669

so the SGML handbook was published I think in 1990, a few years after the release of ISO 8879:1988, which it wholly contains
the text Markup of Mathematical Formulas was published in 1989, while its precursor Electronic Preparation and Markup was published in 1988 (which uses SGML)
there's new symbols in TR 9573-13:1991, and based on the years, I think it's entirely possible that the timeline went like this:
* 1988: SGML is released
* 1988: EPM is published
* 1989: MMF is published
* 1990: SGML handbook is published, containing the entire SGML spec, including an entity set missing ⍼
* 1991: TR 9573-13 is released, adding ⍼ sourced from MMF (?) or EPM (?)
I then just need access to either MMF and EPM to check

I can also see the ToC for EPM here: https://webstore.ansi.org/preview-pages/NISO/preview_ANSI+NISO+ISO+12083-1995+(R2002).pdf
So I think it would be under A.6, possibly A.6.7 Labelled Arrows (being a character filed under arrows, and having a name which is a label)

I can probably get access to EPM via my library since it's an ANSI standard, but no such luck for MMF

I'm not sure why the SGML handbook references MMF rather than EPM. I'm not sure if this means that MMF has more character than EPM does

which means I need a copy of MMF. welp

Actually: in Practical SGML, chapter 14, it says that EMPM came *before* the SGML standard. So it's possible that the characters defined in the SGML standard come from EMPM, then MMF is published with more characters, and finally TR 9573-13 adopts the extra characters, which explains the incongruency between the entity sets of SGML and of TR 9573-13

A little bit of more history https://ksi.cpsc.ucalgary.ca/archives/HTML-WG/html-wg-95q2.messages/0239.html which makes me think that ISO 12083 probably came after and references TR 9573-13, but its precursor ANSI/NISO Z39.59-1988 came before it

lol I found a copy of ISO 8879 without DRM
https://nvlpubs.nist.gov/nistpubs/Legacy/FIPS/fipspub152.pdf

I found this http://cds.cern.ch/record/285265/files/cn-95-008.pdf?version=1 which has in appendix G the entire maths entity set of ISO 12083 and it's actually quite small and I don't see a lot of symbols so. not here

hehe

oh you can't see that against a black background. hold on

like that

I tried to download the PDF I uploaded to libgen and it says it's "damaged or corrupted" lmao uh oh

I think Acrobat is just upsetti about me having unDRM'd a PDF bc I could open it in my browser PDF viewer and in okular

YO look what I found under 55676 http://10036ra.org/glyph-table.php?page=556

It's from AFII's International Glyph Register and I can't find a scan of it BUT it's at the Library of Congress apparently https://lccn.loc.gov/94128788
gimme gimme gimme

I found this really interesting account of AFII by its former president http://www.unicode.org/L2/L1999/99342-afii.txt

hmm I never noticed this blurb in the SGML Handbook:
"NOTE — Visual depictions of most of the technical use entities are identified by their entity names in Association of American Publishers
Electronic Manuscript Series: Markup of Mathematical Formulas, published by the Association of American Publishers, Inc., 2005 Massachusetts
Avenue, N.W., Washington, DC 20036, U.S.A."