liga
Standard ligatures
dlig
Discretionary ligatures
locl
Localized forms (Romanian, Moldavian)
onum
Oldstyle figures
sinf
Scientific inferiors
frac
Fractions
zero
Slashed zero
calt
Contextual alternates
tnum
Tabular figures
ss01
Stylistic set 1
ss02
Stylistic set 2
liga
Specific ligatures