Understanding the order in which Chameleon invokes each script is important to understanding how they interact. The order is as follows while parsing (incoming) messages:

• In the order the segments are received in the message, each incoming field script is triggered in order of lowest to highest.
• The table incoming scripts are then triggered during the mapping phase, once again in column order from lowest to highest.

The call sequence for generating (outgoing) messages is:

• The table's outgoing scripts are triggered during the mapping phase in order of lowest to highest column number.
• The segment outgoing scripts are invoked from the first segment in the message to the last, once again from lowest field number to highest field number in each segment.