The following describes the most significant changes which
occurred in the AST library between versions V5.4-0 and V5.5-0:
- The FitsChanFitsChan “TabOKTabOK” attribute is now an integer value rather
than a boolean value. If TabOK is set to a non-zero positive integer
before invoking the
astWriteastWrite
method, its value is used as the version number for any table that is
created as a consequence of the write operation. This is the value stored
in the PVi_1a keyword in the IMAGE header, and the EXTVER keyword in the
binary table header. In previous versions of AST, the value used for these
headers could not be controlled and was fixed at 1. If TabOK is set to a
negative or zero value, the -TAB algorithm will not be supported by
either the
astWrite or astReadastRead
methods.