User Guide

Making OpenType Fonts
637
Glyphs
These are represented by the glyph name. A glyph name may be up to 31
characters in length, must be entirely comprised of characters from the
following set:
A-Z
a-z
0-9
. (period)
_ (underscore)
and must not start with a digit or period. The only exception is the special
character ".notdef".
"twocents", "a1", and "_" are valid glyph names. "2cents" and ".twocents"
are not.
An initial backslash serves to differentiate a glyph name from an identical
keyword in the feature file language. For example, a glyph named "table"
must be specified in the feature file as:
\table