calChecker rules applied for HAWKI (calibrations for calibrations)
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1. List of depending CALIB raw data types, used for CAL4CAL:
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        DARK:  DPR.CATG=="CALIB" and DPR.TECH=="IMAGE" and DPR.TYPE=="DARK" 

2. List of triggering CALIB raw data types, used for CAL4CAL:
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         STD:  DPR.CATG=="CALIB" and DPR.TECH=="IMAGE" and DPR.TYPE=="STD" and TPL.NEXP==4 
        FLAT:  DPR.CATG=="CALIB" and DPR.TECH=="IMAGE" and DPR.TYPE=="FLAT" and TPL.NEXP > 2 
  ASTROMETRY:  DPR.CATG=="CALIB" and DPR.TECH=="IMAGE" and ( DPR.TYPE=="ASTROMETRY,OBJECT" or DPR.TYPE=="ASTROMETRY,SKY" ) 

3. Association rules for CAL4CAL, used in the calChecker:
 col1: triggering CALIB raw data type (defined in 2.)
 col2: depending  CALIB raw data type, required for calibration (defined in 1.)
 col3: validity time range in days used for checking
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trig_CALIB dep_CALIB                      DeltaT/d
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STD        DARK                            1.0
STD        FLAT                           21.0

FLAT       DARK                            1.0

ASTROMETRY DARK                            1.0
ASTROMETRY FLAT                           21.0