A revision and extension of
Ada (Ada 83) begun in
1988 and completed on 1994-12-01 by a team lead by Tucker Taft
of Intermetrics. Chris Anderson was the Project Manager.
The printed standard was expected to be available around
1995-02-15.
Additions include
object-orientation (
tagged types,
abstract types and class-wide types), hierarchical
libraries and synchronisation with shared data (protected
types) similar to
Orca. It lacks
multiple inheritance but
supports the construction of multiple inheritance type
hierarchies through the use of generics and type composition.
GNAT aims to be a free implementation of Ada 95.
You can get the standard from the
Ada Joint Program Office.
["Introducing Ada 9X", J.G.P. Barnes, Feb 1993].