This is not a contradiction. combine the two rules and they are equivalent to these two alternate rules: WB56 can be read as these two:
(WB56a) ALetter × (MidLetter | MidNumLet | Single_Quote) (ALetter | Hebrew_Letter) (WB56b) Hebrew_Letter × (MidLetter | MidNumLet | Single_Quote) (ALetter | Hebrew_Letter) Then add : (WB57) Hebrew_Letter × Single_Quote it just removes the condition of a letter following the quote in WB56b. So that WB56b and WB57 can be read as equivalent to these two: (WB56c) Hebrew_Letter × (MidLetter | MidNumLet) (ALetter | Hebrew_Letter) (WB57) Hebrew_Letter × Single_Quote But you cannot merge any of these two last rules in a single rule for WB56. 2015-01-25 7:26 GMT+01:00 Karl Williamson <[email protected]>: > I vaguely recall asking something like this before, but if so, I didn't > save the answers, and a search of the archives didn't turn up anything. > > Some of the rules in UAX #29 don't make sense to me. > > For example, rule WB7a > Hebrew_Letter × Single_Quote > > seems to say that a Hebrew_Letter followed by a Single Quote shouldn't > break. (And Rule WB4 says that actually there can be Extend and Format > characters between the two and those should be ignored). > > But the earlier rule, WB6 > > (ALetter | Hebrew_Letter) × (MidLetter | MidNumLet | > Single_Quote) (ALetter | Hebrew_Letter) > > seems to me to say (among other things) that a Hebrew Letter followed by a > Single Quote shouldn't break if and only if the latter is also followed by > either an ALetter or another Hebrew Letter (again modulo ignored Format and > Extend letters) > > This seems contradictory. One rule says something unconditionally, and > the other rule adds conditions. > _______________________________________________ > Unicode mailing list > [email protected] > http://unicode.org/mailman/listinfo/unicode >
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