Maxicode modes.
Maxicode barcodes have two main message structures referred to as Primary Message and Secondary Message. The mode determines the content of the message structures and the Error Correction (EEC = Enhanced Error Correction, SEC = Standard Error Correction).
Since each message section, Primary Message or Secondary Message, can have different levels of error correction, the data to be encoded into the Maxicode barcode is divided into message sections depending on the mode.
- Mode 2: Structured Carrier Message: 6-9 chars postal code (numeric).
- Mode 3: Structured Carrier Message: 6 chars postal code (alphanumeric).
- Mode 4: Standard Symbol. Unstructured data, general-use barcode. EEC Primary Message, SEC Secondary Message.