Titling Alternates

To preface, this is my first post to the forum and I've done a fair amount of digging on the issue, but haven't found any solution to my question. Apologies in advance if it has been answered somewhere else. And I must say, that the community here has been extremely invaluable so far!

I have designed Titling Alternates (labeled titling in OpenType Classes) for the Uppercase (upcs in OpenType Classes) glyphs in my font.

For this, my feature is as follows:

feature titl { sub @upcs by @titling; } titl;

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?

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