Xerox 6180N Using LCDS Print Description Language - Page 209

Using logical processing Options Table 3-21. TEST parameter options and definitions Option Definition testexp test expression. Defines a test expression for a block that will be selected for printing (BSELECT) or deleted (BDELETE). Refer to "Coding a test expression" earlier in this chapter for the format and syntax of a testexp. Default No default BSELECT and BDELETE commands: points to note Note the following when using the BSELECT and BDELETE commands: • It is important to note that block selection or block deletion is performed before the extraction of the records from the block. If a block is deleted from or not selected for printing, none of the records contained within that block are processed or are available for any other logical processing functions. • If a block does not match the same format as the normal blocks, it can be deleted and thus not cause a processing error. For example, a control block in a fixed blocked file may cause a processing error unless it is first deleted. • When defining TABLE CONSTANT or CHANGE parameters, specify offsets to subfields of a block in bytes relative to zero, from the start of the block to the beginning of the subfield. Examples This section shows examples of use of the BSELECT and BDELETE commands. Example 1 The following commands illustrate the use of BSELECT to process interspersed reports on a block basis. Refer to the figure below. T1: TABLE CONSTANT=('P'); C1: CRITERIA CONSTANT=(0,1,EQ,T1); BSELECT TEST=(C1); Using LCDS Print Description Language 3-29