PDF417 also has several variants of the code form:
* PDF417 truncated code
In a relatively "clean" environment, where the possibility of bar code corruption is low, the right row indicator can be omitted and the terminator can be reduced.
* PDF417 microcode
Further reduced PDF code.
* Macro PDF417 code
When the file content is too long to be represented by a PDF417 code, it can be represented by a macro PDF417 code containing a plurality of (1 to 99999) bar code blocks.
Taking the PDF417 code as an example, the characteristics and features of the two-dimensional bar code are introduced.