I've recently learned how to use Fontlab Studio 5, and I also learned how to script ligatures. But I noticed Illustrator for example has more buttons in the type tool section: Standard Ligatures, Contextual Ligatures, Discretionary Ligatures, Swash, Stylistic Alternates, Titling Alternates, Ordinals and Fractions.

So out of that list, I only know how to script the standard ligatures. Does anyone know how to script the others, or do you know a source to learn about it? Most font families contain all the ligatures and swash letters as seperate fonts rather than putting it into a single font (OpenType). Is there a reason for doing this?