Standard Ligatures

Creating arabic fonts using font lab - (Ligatures) - help needed

Dears Typophilers,
I'm new in the typography design.
I did an arabic font with Fontographer 5 but I didn't finish because I need some help.

I need to know how I can create Open type standard ligatures feature with Fontographer 5, font lab or Volt.

or I need to know how I can create ligatures feature.. when I type some letters together the glyph replaces.. for example AL-JALALAH WORD (ALLAH), in some fonts if you type LAM LAM HAA it will have specific shape.

any tutorials, lessons or hints will be very helpful.


How do I script Swash letters, alternates etc.?


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?