1) Updated the compression method and flags to have more values and descriptions.
2) Updated the iTXt/zTXt/tEXt to be repeatable.
3) Changed the zTXt type to have a binary field, instead of string field.
4) Add valid bitdepth values.
5) Added a colour data field to the bKGD chunk.
1) Updated the compression method and flags to have more values and descriptions. 2) Updated the iTXt/zTXt/tEXt to be repeatable. 3) Changed the zTXt type to have a binary field, instead of string field. 4) Add valid bitdepth values. 5) Added a colour data field to the bKGD chunk.