UCD 17.0.0 source

ppucd.txt is vendored from ICU's pre-parsed UCD file:

https://raw.githubusercontent.com/unicode-org/icu/master/icu4c/source/data/unidata/ppucd.txt

This copy reports ucd;17.0.0 and is the current source for gramgen's generated Unicode property tables. SHA256SUMS pins the downloaded file content:

shasum -a 256 -c data/ucd/17.0.0/SHA256SUMS

The generated files are:

• include/gramunicode_props.h
• runtime/gramunicode_props.c

Regenerate them from the vendored data with:

make unicode-props

Do not edit the generated files by hand. Change tools/gen_unicode_props.py or refresh ppucd.txt, then regenerate.

ppucd.txt keeps the upstream Unicode copyright and license header. The file states:

• Copyright (C) 1991 and later: Unicode, Inc. and others.
• License and terms of use: http://www.unicode.org/copyright.html