Compatibility decomposition for Hebrew and Greek final letters

[Eli Zaretskii]

> From: Philippe Verdy <verdy_p at wanadoo.fr>
> Date: Thu, 19 Feb 2015 20:31:07 +0100
> Cc: Julian Bradfield <jcb+unicode at inf.ed.ac.uk>, 
> 	unicode Unicode Discussion <unicode at unicode.org>
> 
> The decompositions are not needed for plain text searches, that can use the
> collation data (with the collation data, you can unify at the primary level
> differences such as capitalisation and ignore diacritics, or transform some
> base groups of letters into a single entry, or make some significant primary
> difference when there are diacritics (for example in German equating 'ae' and
> 'ä' at the primary level).

Sorry, I disagree.  First, collation data is overkill for search,
since the order information is not required, so the weights are simply
wasting storage.  Second, people do want to find, e.g., "²" when they
search for "2" etc.  I'm not saying that they _always_ want that, but
sometimes they do.  There's no reason a sophisticated text editor
shouldn't support such a feature, under user control.