## changeslist_of_most_recent_changesChanges Introduced in V9.3.0

The following describes the most significant changes which have occurred in the AST library between versions V9.2.14 and V9.3.0 (the current version):

1. A new subclass of MappingMapping, a SplineMapSplineMap, has been added, which represents a 2-in, 2-out Mapping defined by a pair of two-dimensional B-spline surfaces.

Programs which are statically linked will need to be re-linked in order to take advantage of these new facilities.