Masked Comparisons Using Default Type Assignments; Masked Comparisons Using Non-Default Type Assignments - Oce XDL Reference Manual

Using Logical Processing

4.3.3 Masked comparisons using default type assignments

Performing masked comparisons using unmodified standard default type assignments re-
quires coding the following:
• TCODE command. Used either to modify a set of standard default type assignments
or to define a completely new set. Refer to the "Character type assignments" section in
the chapter "Specifying input parameters," for detailed information on the TCODE com-
mand.
• TCODE parameter of the VOLUME command. Allows you to select a set of standard
default type assignments.
• MASK and CONSTANT parameters of one or more occurrences of the TABLE
command. Together, these parameters define exactly how the comparisons for that
TABLE command are made using the set of type assignments specified by the TCODE
parameter of the VOLUME command.

4.3.4 Masked comparisons using non-default type assignments

Performing masked comparisons using either a nonstandard character set or a standard
set for which the default type assignments are not suitable requires coding the following:
• TCODE command. This command is used either to modify a set of standard default
type assignments or to define a completely new set. Refer to the "Character type as-
signments" section in chapter "Specifying input parameters," for detailed information on
the TCODE command.
• TCODE parameter of the VOLUME command. This parameter is used to specify the
set of assignments defined by the TCODE command as the one used for masked com-
parison.
• The MASK and CONSTANT parameters of one or more occurrences of the TABLE
command. The use of these parameters is the same as for comparisons using unmod-
ified defaults.
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