Description

This routine sets the expression used to define the boundary condition, or conditions, of the CALDB search when calFindFile() is called. A value of "-" means that no boundary conditions are to be used.

This field corresponds to the expr parameter of the quizcaldb tool. The conditions are expressed using a syntax similar to FORTRAN boolean expressions, so that

cti_app.eq.PPPPPNPNPP

means that only those files relevant for CTI-corrected data should be searched, while

cti_app.eq.NNNNNNNNNN.and.ccd_id.lt.4

means to look for data relevant to non CTI-corrected data whose ccd_id field is less than 4 (i.e. the ACIS-I array).

Note that the routine to get the current boundary condition from a CALDB structure is called

calGetQuery()

The caldb module is not available by default; to use it in a S-Lang program, it must be loaded using the S-Lang require() function:

  require("caldb");