Xerox 4112-4127 Enterprise Printing System-192 - Manual (Page 124)

Specifying input parameters
2-16 Using LCDS Print Description Language
Default 1
BLOCK LTHFLD:
point to note
• If the size is set to 0, the block length field is not considered
to be part of the block; and the length of a block on the tape is
the actual physical block length.
• The LTHFLD parameter may be overridden if RECORD
STRUCTURE is changed through tape label processing.
BLOCK OFFSET
Specifies the location of the block length field.
Syntax BLOCK OFFSET = value
Options
Default 0
BLOCK POSTAMBLE
Specifies the length in bytes of the extraneous data at the end of
each tape block, measured from the end of the block backwards
to the end of the last logical record.
Syntax BLOCK POSTAMBLE = length
Options
Default 0
Table 2-11. BLOCK OFFSET parameter options and definitions
Option Definition
value Specifies the number of bytes that the block length field is offset from the first
byte of the block. The value is an integer in the range 0 to LENGTH-LTHFLD –1.
Table 2-12. BLOCK POSTAMBLE parameter options and definitions
Option Definition
length An integer in the range of 0 to the block length that specifies the number of
bytes that follow the last logical record to the end of each tape block.