 with a positive="down" attribute in a NetCDF file, or with a 
DEFINE AXIS/DEPTH or SET AXIS/DEPTH command. </LI><BR><BR>

<LI><A NAME="return_cal"><B>RETURN=CALENDAR</B> gives access to the calendar attribute 
of an axis</LI><PRE>
   
   yes? USE mydata
   yes? SAY `sst,RETURN=calendar`
    !-> MESSAGE/CONTINUE GREGORIAN
   GREGORIAN
   
   yes? SET AXIS/CALENDAR=julian `sst,RETURN=taxis`
    !-> SET AXIS/CALENDAR=julian T_AX
   
   yes? SHOW AXIS T_AX
    name       axis              # pts   start        