On 7/24/2014 10:45 AM, Whistler, Ken wrote:
Fantasai asked:
I would like to request that Unicode include, for each writing system it
encodes, some information on how it might justify.
Following up on the comment and examples provided by Richard
Wordingham, I'd like to emphasize a relevant point:
Scripts may be used for *multiple* (different) writing systems.
Rules for justification of text are aspects of writing systems,
orthographies, and typographical conventions -- and are not
inherent properties of scripts.
The encoding of the Latin script is intended to be used for Fraktur.
Fraktur, as used for German until the early 20th century is its own
system, with its own rules. These affect justification and they are
notably different from the rules used for German typeset in the modern
style.
For an easy to understand example, Fraktur has a commonly used form of
emphasis by increased inter-letter spacing something that's rare or
absent in other Latin-based writing systems. Because of its use for
emphasis, it is not possible to use increased inter-letter spacing for
justification. The counter example is US newspaper layout where this
feature is commonly observed to help in justification of narrow columns.
(The use of letter-spacing for emphasis has not fully died out in
German, though with modern computer typesetting bold and italic are
easily available. For that reason, its use for justification is felt as
jarring to many readers, because it would subconsciously be interpreted
as randomly applied emphasis).
So, here you have a non-complex script like Latin, and two writing
systems that fundamentally disagree on what is allowed, preferred or
required for justification in certain contexts.
To make matters more interesting, Fraktur has required and optional
ligatures, with the required ones staying together on letter spacing
while the optional ones are broken apart. Fraktur typesetting will
adjust the use of optional ligatures as part of the justification
process, for jet another difference between it an other writing systems
based on Latin.
So while there may be strong tendencies for certain scripts to
fall into certain typographical practices, including behavior for
text justification, I don't think that information is inherent
to scripts per se. And it would be misleading and gardenpathy
for the Unicode Standard to try to treat justification as
somehow inhering to scripts.
Well put.
A./
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