From: Kenneth Whistler (firstname.lastname@example.org)
Date: Wed Jun 17 2009 - 20:19:14 CDT
Karl Williamson inquired:
> Supposedly Unicode has only removed one property, but I've been looking
> at old releases, and see several things that look like they are meant to
> be properties that I don't recognize in the PropList.txt like
> 'Zero-Width'. Others look like aliases for other properties, like
> 'Space' appears to be Zs. Others look like combinations of two
> properties, like 'Paired Punctuation'.
You are looking at very old versions of PropList.txt,
when it truly was an entirely informative data file, with
no normative implications, and before the UTC restructured
it and started keeping track of exactly what did and did
not constitute formal character properties in data files
other than UnicodeData.txt.
PropList-3.1.0.txt is the first version that had official
status, used the current format (more or less), and which had
formal property aliases that can be traced consistently
through to current versions of the standard.
Versions of PropList.txt associated with Unicode 3.0.1 and
earlier (back to Unicode 2.0, the earliest version with
any data files) were simply dumps of a character property
implementation that I personally maintained, and which I
offered as informative material in case other people wanted
to look at it. None of the values in that file had any
formal property status at the time.
> So my question is were any of these official properties or official
> aliases thereof, or were they just descriptive phrases.
Just descriptive phrases.
> I've looked
> some but not a lot in the 3.0 online guide, and haven't found anything;
> the index is not very helpful.
There was no formal documentation of any of that. The
formal property lists and their full documentation came later.
For Version 3.0, UnicodeCharacterDatabase.html basically
says the file PropList.txt exists and has additional informative
This archive was generated by hypermail 2.1.5 : Wed Jun 17 2009 - 20:22:44 CDT