From: Werner LEMBERG (wl@gnu.org)
Date: Wed Jan 27 2010 - 00:35:35 CST
> I have tested with some current software, using the test text
> (brackets shown where ligatures are required by Fraktur rules):
> Ka[tz]e, [ſi]eh, gu[ck]! Brot(ZWNJ)zeit!
The `si' ligature is not `required', only recommended. In Fraktur,
the mandatory ligatures (for non-foreign words) are only `ch', `ck',
and `tz' which never get separated even in `Sperrsatz' (letterspacing,
the normal form of emphasis in Fraktur). `ſi' actually gets separated
in letterspacing.
Useful links:
http://www.kurrentschrift.eu/bfds/veroeff/Knigge_digital.pdf
http://omega.enstb.org/yannis/pdf/dante2000.pdf
The latter also contains an appendix with the Fraktur rules from the
Duden published in 1919.
Werner
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