| line | !l | l&&!r | l&&r | condition | 
 
| 136 | 0 | 1 | 0 | defined $FITS_headers->{'CTYPE2'} and $FITS_headers->{'CTYPE2'} eq "DEC--TAN" | 
 
|  | 1 | 0 | 0 | defined $FITS_headers->{'CTYPE2'} and $FITS_headers->{'CTYPE2'} eq "DEC--TAN" and abs $scale < "0.001" | 
 
| 171 | 0 | 1 | 0 | exists $FITS_headers->{'FILTER'} and $FITS_headers->{'FILTER'} =~ /pol/i | 
 
| 203 | 0 | 0 | 1 | defined $format and $format eq "HDS" | 
 
|  | 0 | 0 | 1 | defined $format and $format eq "HDS" and defined $date | 
 
|  | 0 | 0 | 1 | defined $format and $format eq "HDS" and defined $date and $date > 20000507 | 
 
|  | 0 | 1 | 0 | defined $format and $format eq "HDS" and defined $date and $date > 20000507 and $date < 20000720 | 
 
| 236 | 0 | 0 | 1 | defined $generic_headers->{'FILE_FORMAT'} and $generic_headers->{'FILE_FORMAT'} eq "HDS" | 
 
|  | 0 | 1 | 0 | defined $generic_headers->{'FILE_FORMAT'} and $generic_headers->{'FILE_FORMAT'} eq "HDS" and defined $date | 
 
|  | 1 | 0 | 0 | defined $generic_headers->{'FILE_FORMAT'} and $generic_headers->{'FILE_FORMAT'} eq "HDS" and defined $date and $date > 20000507 | 
 
|  | 1 | 0 | 0 | defined $generic_headers->{'FILE_FORMAT'} and $generic_headers->{'FILE_FORMAT'} eq "HDS" and defined $date and $date > 20000507 and $date < 20000720 | 
 
| 302 | 0 | 1 | 0 | defined $FITS_headers->{'CTYPE1'} and $FITS_headers->{'CTYPE1'} eq "RA---TAN" | 
 
|  | 1 | 0 | 0 | defined $FITS_headers->{'CTYPE1'} and $FITS_headers->{'CTYPE1'} eq "RA---TAN" and abs $scale < "0.001" | 
 
| 398 | 0 | 1 | 0 | defined $dateend and not $dateend =~ /\d/ | 
 
| 423 | 0 | 2 | 0 | defined $dateobs and not $dateobs =~ /\d/ | 
 
| 449 | 0 | 0 | 1 | exists $FITS_headers->{'RDOUT_X1'} and exists $FITS_headers->{'RDOUT_X2'} | 
 
| 501 | 0 | 0 | 1 | exists $FITS_headers->{'RDOUT_Y1'} and exists $FITS_headers->{'RDOUT_Y2'} |