Implications of Logical Order Exception Property

[Richard Wordingham]

On Wed, 25 Jan 2017 12:35:33 -0800
Markus Scherer <markus.icu at gmail.com> wrote:

> On Wed, Jan 25, 2017 at 12:00 PM, Richard Wordingham <
> richard.wordingham at ntlworld.com> wrote:  
> 
> > > > 2) Claims that logical_order_exception is relevant for searching
> > > > (TUS, as above)  
> >  
> > > It informs the construction of the DUCET and could be used to
> > > suppress_contractions in a search tailoring (see CLDR root
> > > collation data file).  
> >
> > It is irrelevant for searching.  If one created a collation just for
> > searching, one wouldn't have to remove the effects of this
> > irrelevant property.
> >  
> 
> It narrows match boundaries and improves performance.

What is 'it'?  If 'it' means 'removing the effects...', then it would be
irrelevant in a collation created just for searching.  The effects
wouldn't be there to complicate matters.  A search-only collation for
normalised, correctly spelt Thai would be simple; it would have no
contractions unless you wanted to claim that words containing <U+0E24
THAI CHARACTER RU, U+0E45 THAI CHARACTER LAKKHANGYAO> did not contain
<U+0E24>.)

Richard.