Re: UAX44: loose matching of symbolic values and the `is` prefix

From: Markus Scherer <>
Date: Mon, 6 Jun 2016 09:09:11 -0700

Interesting discussion!

ICU does not support "is" nor "in" prefixes. I wasn't even aware that UAX
#44 loose matching prescribes "is". ICU just implements what
Property[Value]Aliases.txt say:

# Loose matching should be applied to all property names and property
values, with
# the exception of String Property values. With loose matching of
property names and
# values, the case distinctions, whitespace, hyphens, and '_' are ignored.

The prefixes seem gratuitous and confusing. For example, if I
read UAX44-LM3 right, it would allow [:isscript=isgreek:].

We do support just [:Greek:] for scripts and [:L:] for general categories.

I would rather not add support for the prefixes in ICU.

Received on Mon Jun 06 2016 - 11:09:43 CDT

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