Defining Geograpic areas in UBL - How?

Dear UBLers, 

The Freightwise project is moving to formulate their
data models, and subsequently their documents, in UBL. They have requirements
to define locations as either a point or a geographic area. I believe that
Freightwise envisions defining a geographic area by listing 3 or more points or
coordinate locations.



I am querying the UBL TC participants to ask if this
has already been done in UBL, and if so, how;  or,  will an area location represent
a new requirement? Whether it already exists or is a new requirement I am vitally
interested in learning how this should be done within UBL. All comments or
suggestions are enthusiastically welcome. 

Regards,

Andy Schoka