Proposal to remove Preferred-Value field for region YU in LTRU

[Caoimhin O Donnaile]

In some applications, "geocoordinates" - i.e. latitude and longitude -
might provide a better alternative to country or regional codes.

i.e. Rather than trying to decide whether a book or film or dialect
sample from some particular year should be tagged as "China" or 
"Yugoslavia", for example, or trying keep an elaborate system of
codes for "China" or "Yugoslavia" with their changing and disputed
borders over time, the item could be labeled with a point in space-time:
i.e. a date together with the geocoordinates of the town or place where
it originated.

Often the location would not be known exactly, or an exact
location might not be relevant, but in some such cases it might
be sufficient to choose a representative location somewhat
arbitrarily and mark this as "indicitive", meaning: "This location
is not precise, but for the purposes of this catalogue it can be
treated as if it were precise."

Digitised country boundaries, past and present, are (or hopefully
will be) readily available.  Given these and the coordinates of a 
particular point, it is a trivial and extremely fast computer operation
("point in polygon") to determine which country the point lies in.

Caoimhín