| Version | See ISO 18004:2006 Annex D |
| ECBlocks | <p>Encapsulates a set of error-correction blocks in one symbol version. Most versions will use blocks of differing sizes within one version, so, this encapsulates the parameters for each set of blocks. It also holds the number of error-correction codewords per block since it will be the same across all blocks within one version.</p> |
| ECB | <p>Encapsualtes the parameters for one error-correction block in one symbol version. |