Xerox 701P21091 manual Point to note, Block Offset, Syntax, Block Postamble

Specifying input parameters

Default	1
BLOCK LTHFLD:		• If the size is set to 0, the block length field is not considered to
point to note		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

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.

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

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.

Default 0

2-16 Using LCDS Print Description Language