ANSI (and therefore Unicode) has the soft hyphen (U+00AD), which is a
normally zero-width character that can be used as a hyphenation point.
This is designed to fulfill your second request.
ZWJ has different semantics from a "don't hyphenate here" (ZWDH)
character, which is used to overrule hyphenation algorithms. ZWJ is
used to control joining of cursive fonts, and in principle might allow
hyphenation at such a point. I can't find any Unicode character that
means "don't hyphenate here", but I have found such a character to be
useful in word processing. It would be possible to mark such a
relationship using parallel rich text, but that does seem to be heavy
weight. In view of the presense of similar kinds of punctuation
symbols, e.g., ZWJ and ZWNJ, I think it would make sense to add a ZWDH
character to Unicode.
>From: unicode@Unicode.ORG [SMTP:unicode@Unicode.ORG]
>Sent: Monday, January 06, 1997 10:28 AM
>Subject: FW: Hyphenation Points
>I am forwarding this on for Mr. Raner.
>>From: Mirko Raner[SMTP:firstname.lastname@example.org]
>>Sent: Saturday, January 04, 1997 10:20 AM
>>Subject: Hyphenation Points
>>our company is currently developing a Unicode-conforming word-processing
>>application. Especially for the process of hyphenation we have encountered
>>1. How can we prohibit a hyphenation at a certain position in a word?
>> Sometimes it can be necessary to insert a special character eg in order
>> to prevent the hyphenation algorithm from splitting some proper name at a
>> wrong position.
>> We thought about using the ZERO WIDTH JOINER (U+200C) to achieve this,
>> we are not sure if this is allowed (as the ZWJ obviously has slightly
>> different semantics).
>>And even more important:
>>2. How can hyphenation at a certain position be forced?
>> Our idea is to insert a "hint character" at which a word is hyphenated
>> it is split due to line boundaries; the user might want to prescribe the
>> hyphenations of a word manually. Unicode provides several hyphen
>> but the one we need, is an invisible (zero-width) character which simply
>> tells the hyphenation algorithm to hyphenate after this position (if
>> hyphenation is necessary).
>>Help on how to solve these problems will surely be appreciated.
>>Thank you very much in advance.
>>MATHEMA Software GmbH
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