Questions on the Unicode BiDirectional (BIDI) Algorithm

[Eli Zaretskii]

> From: "William Blackwood" <wblackwo at tampabay.rr.com>
> Date: Mon, 7 Jul 2014 10:13:28 -0400
> 
> Doug, from Unicode Standard Annex #9 Unicode Bidirectional Algorithm:
> 
> 
> 3.3.4
> 
> W2. Search backward from each instance of a European number until the first strong type (R, L, AL, or sos) is found. If an AL is found, change the type of the European number to Arabic number.

This changes the _type_ of the character, but does not change the
character itself.  The type of the character, as updated by W2, is
then used in further processing.  But the character stays what it
originally was.