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Page 125
Prefix/Suffix
Introduction
1D barcodes could contain digits, letters and symbols, etc. 2D barcodes could contain more data, such
as Chinese characters and other multi-byte characters. However, in reality, they do not and should not
have all the information we need, such as barcode type, date and time of scan, delimiter, and so on, in
order to keep the code short and
fl
exible.
Pre
fi
x and Suf
fi
x are how to ful
fi
ll the needs mentioned above. They can be added, removed, and
modi
fi
ed while the original barcode message is still in tact.
Barcode processing sequences:
1.
Intercept barcode message
2.
Add Pre
fi
x/Suf
fi
x
3.
Pack
4.
Terminate with Terminal and transmit
