Xerox 701P21091 - Manual (Page 125)

Specifying input parameters
Using LCDS Print Description Language 2-17
BLOCK
POSTAMBLE
parameter: points
to note
• If the block delimiter string constant is specified, the block
postamble is ignored.
• The POSTAMBLE parameter may be overridden if RECORD
STRUCTURE is changed through tape label processing.
BLOCK PREAMBLE
Specifies the length of the operating system portion of the block;
that is, the byte offset from the first byte of a tape block to the first
byte of the first logical record.
Syntax BLOCK PREAMBLE = length
Options
Default 0
BLOCK ZERO
Specifies the End-of-block indicator.
Syntax BLOCK ZERO = {NO | YES}
Options
Default NO
Table 2-13. BLOCK PREAMBLE parameter options and definitions
Option Definition
length An integer in the range of 0 to the block length that specifies the number of
bytes from the first byte of the tape block to the first byte of the first logical
record
Table 2-14. BLOCK ZERO parameter options and definitions
Option Definition
YES Specifies that the end of a tape block is indicated by a value of 0 in the record
length field (before applying the record length adjustment). Data that follows the
record is ignored through the end of the block.
NO Indicates that the end of a tape block is not indicated by a value of 0 in the
record length field.