Two-dimensional bar codes
49
Note: Byte Compaction Mode is sometimes referred to as Binary Compaction Mode.
Symbology ID bytes 1 and 2: (Required = 0001x)
These two bytes signify the symbology. All bar code descriptors must reserve the first two bytes for
the symbology ID so the remaining bytes can be interpreted accordingly because most descriptors
are of different sizes and information. For PDF417, these two bytes must be 00x and 01x.
6-7 Y
dimension
byte 1 (in
Units)
Y
dimension
byte 2 (in
Units)
480-60000 (dec)
Note: Values that go
beyond the defined
range will be
appropriately clipped
and set to the
minimum and
maximum values.
• 1890
(dec)
or
• 07 62
(hex)
Optional.
Note: The range of values of the Y
dimension is between 2 to 5 times
the values of the X-dimension. Any
value beyond that range will be
clipped appropriately and set to the
minimum and maximum values.
Sets the Y dimension of the
module (white or black rectangle)
in one-hundredths of an inch.
The default width of this element
from the BCE is twice that of the X
dimension. To set the Y dimension
to default at 600 dpi requires a
value of 18.9, which is specified as
1890 (dec) or 07 62 (hex).
The Units enumeration would be
set to 02 (hex) (or 00 (hex)), and
these two bytes would be 07 (hex)
and 62 (hex). If not specified, the Y
dimension will become double that
of the X dimension.
8-9 Rows Columns Rows: 4-44 (dec)
Columns: 1-4 (dec)
•0 (dec)
or
•00 (hex)
Optional.
Manually set the number of symbol
rows. Automatic operation
specified by using 0. See Section
9.5.3 Row and Column Boundary
Conditions.
Manually set the number of symbol
columns. Automatic operation
specified by using 0.
10-15 Reserved (and do not have to be specified)
Bytes MSB LSB Range
Default
(if not
specified)
Definition
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