···<Datum: Sunday, 01. May 2016>···<Von: Ulrike Fischer>···

> Am Sun, 1 May 2016 11:45:02 +0200 schrieb Philipp Gesang:
> 
> >> So somehow in math the +onum is lost in plain and latex but not in
> >> context. What is context doing differently to avoid this?
> > 
> >     mode=base
> 
> If context attach mode=base to math, how does it it?

A one would do in Luaotfload: specify base mode when defining the
font. It’s unrelated to math, just the default set of features
that Luaotfload has been applying to every definition for ages.
The reasoning -- by Khaled and others -- was, that the Opentype
standard mandates some defaults so Luaotfload should follow suit.

The defaults can be overridden by setting the appropriate values
in luaotfload.conf(5).

>                                                      How can you
> switch a feature like mode=node to mode=base for every font in math?

Define two fonts: one for use in math mode, another for where you
really, really require node mode.

Philipp