Like processing differences for TERRITORY_BASED VS USC_BASIC

[Kathey Marsden]

Looking at the code and tests, it seems to me that the primary 
difference in like processing for TERRITORY_BASED vs USC_BASIC collation 
is that processing is handled on collation elements rather than 
characters, so that _ will match a single collation element and not a 
single character.  It seems that that particular behavior is a bug, _ 
should match a single character regardless of collation elements. So, my 
question is, how is like processing supposed to be different for 
TERRITORY_BASED vs USC_BASIC and can anyone give an example where the 
results should be different?

Thanks
Kathey