files written by some systems set this value to -1. In general, it is
unsafe for systems reading system files to rely upon this value.
-@item int32 compressed;
+@item int32 compression;
Set to 0 if the data in the file is not compressed, 1 if the data is
compressed with simple bytecode compression, 2 if the data is ZLIB
compressed. This field has value 2 if and only if @code{rec_type} is
element denotes the additional discrete missing value.
@end table
+@anchor{System File Output Formats}
The @code{print} and @code{write} members of sysfile_variable are output
formats coded into @code{int32} types. The least-significant byte
of the @code{int32} represents the number of decimal places, and the