Re: ZWJ/ZWNJ - Are they legal to use with combining marks?

From: Peter Kirk (
Date: Fri Aug 15 2003 - 11:06:53 EDT

  • Next message: John Hudson: "RE: ZWJ/ZWNJ - Are they legal to use with combining marks?"

    On 15/08/2003 07:57, Paul Nelson (TYPOGRAPHY) wrote:

    >>This brings us back to the earlier quesion of whether it is
    >>legitimate to use ZWJ or ZWNJ between combining marks
    >It sure better be. This is done in Khmer for controlling register shift
    >combinations for exception words. I have seen nothing in Unicode that
    >states that the ZWJ/ZWNJ can only be used with base type characters.
    Well, I understood that ZWJ/ZWNJ followed by a combining mark gives a
    defective combining sequence, which is not illegal but whose rendering
    is undefined - and which Uniscribe tends to render with a dotted circle.
    Is that correct? But then I was advised that it was permissible to use
    such a sequence for word initial holam male, as long as the font knows
    to expect it.

    I'm copying this to the main Unicode list as its relevance is wider than

    Peter Kirk (personal) (work)

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