## Changes Introduced in V9.2.4

The following describes the most significant changes which occurred in the AST library between versions V9.2.0 and V9.2.4:

1. A bug has been fixed that could prevent the astWriteastWrite method of the FitsChanFitsChan class producing FITS-WCS headers describing alternate axes for some of the Frames in the supplied FrameSetFrameSet. Consequently, the headers produced by astWrite may now include alternate axis descriptions that were not present previously. These can be supressed using the new AltAxesAltAxes attribute.
2. The FitsChan class has a new attribute, AltAxes, which controls the creation of FITS-WCS alternate axis descriptions by the astWrite method.
3. - The KeyMapKeyMap class now supports 64 bit integer (int64_t) entries, represented by the new data type code “K”.
4. Two simplification bugs introduced at V9.2.0 have been fixed.
5. The YamlChanYamlChan class now supports AST “native” encoding.