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activePDF Toolkit Professional Edition
aptkl4a 30405
Copyright 2005, activePDF, Inc. All Rights Reserved.
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Human Readable Text
Human readable text is the displayed barcode value. This can be the actual barcode value or a
numerical representation and can appear above or below the barcode. Visible human readable text
invalidates certain barcodes.
Comment
Acomment is additional text displayed with the barcode, but not included in the encoded value.
Comments appear above or below the barcode, within the label area. You can place comment text
above or below the barcode and define separate comment margins.
Comment Margins
Comment margins are the defined area around the comment text. The comment margins are
determined in relation to the type and size of barcode.
Label Border
The label border is the perimeter of the label area. Changes in the label border should not affect the
label area or barcode.
Discrete
In a discrete symbology, the interpretation of each character encoded does not rely on the rest of the
barcode. Such symbologies have characters that both start and end with a bar. Some amount of
inter-character spacing or inter-character gap separates each character. The inter-character gap
carries no information-the only duty of the inter-character spacing is to separate the characters.
Continuous
In a continuous symbology, the interpretation of each character encoded relies on the rest of the
barcode. This is because characters start with a bar and end with a space. The final space is
"terminated" by the starting bar of the next character. Individually, there is no way to know how wide
the last space is without knowing where the next character begins. Continuous symbologies normally
implement some kind of special termination bar or the termination bar such that the last space of the
last data character terminates termination sequence.
Width
ATwo-Width symbology has spaces and bars that are either wide or narrow. This has the benefit of
simplicity-once you determine the width of a narrow bar, anything over a certain width is "wide". This
allows for a large level of print tolerance in lower-quality printing conditions.
AMultiple-Width has bars and spaces that may be of three or more widths. The narrowest bar or
space may be X in width, a medium-width space or bar may be 2X in width, and a wide bar may be 3X
in width. Since there are more possible combinations available in a multiple-width symbology, data
