>> It also has problems with ZWNJ, it applies it to the wrong buffer.

    Robert> I gather that ZWNJ is compulsory for some languages (fa, ur?), but
    Robert> is ZWJ needed? And if so, where - in particular, can it come at
    Robert> the beginning of lines?

ZWJ is not compulsory for any cases I can think of at the moment, but is often
used to present stand-along initial, medial and final shapes in the Arabic
script, and is used to present stand-alone subordinate (subjoined) consonant
shapes in the Indic scripts.
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Mark Leisher
Computing Research Lab            Cinema, radio, television, magazines are a
New Mexico State University       school of inattention: people look without
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Las Cruces, NM  88003                            -- Robert Bresson
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