> But is ZWJ actually required > within text, or only for display of joining forms in isolation? A simple > example would be of interest.
Yes, it is used in normal text. But the only frequent use is after a single Heh, to make it appear in the initial form (which is by tradition used to distinguish Heh from a 5) rather than the isolated form which will appear if one doesn't add a ZWJ. So in other words, there exists a joining form in isolation that is frequent in normal text, and it is "initial Heh". roozbeh
