My understanding is that it is considered best practice for OT class-based kerning to define kerning classes for everything (apart from exceptions) that one wants to kern. That includes classes which contain only a single glyph, and therefore don't require a class as such.
Can anyone confirm if this is still considered best practice to avoid kern subtable breaks? Or is it acceptable to kern single glyphs against classes?
Thanks!
Comments
And a different advantage is that you can easily spot exceptions.