concrete extension

From: Peter F. Patel-Schneider (pfps@research.bell-labs.com)
Date: 01/23/01 

Hi:

There are differences between the abstract and concrete relationships that
show up in the syntactic definition.  For example, toClass has a range of
Class, which is different from the range of toDataType.  This indicates
that we would lose something if we used toClass for both abstract and
concrete properties.

peter

This archive was generated by hypermail 2.1.4 : 04/02/02 EST