Data structure for an optical reader

A computer-readable media having stored thereon a data structure tangibly embodying menuing instructions executable by a computer to perform a predetermined task in an optical reader apparatus, the data structure comprising:

• a first field containing data indicating whether the menu instructions are compatible with the optical reader apparatus;
• a second field containing at least one command specifying an operation to be performed by the optical reader apparatus;
• and
• a third field containing addressing information for storing a portion of the menuing instructions to a location in a memory;
• and
• at least one fourth field containing data used by the at least one command in performing the predetermined task.

An machine-readable media having stored thereon a data structure, the data structure tangibly embodying menuing instructions executable by a computer to perform a method in an optical reader apparatus, the method comprising:

• retrieving the data structure from the machine-readable media with the optical reader;
• determining, with the computer, that the data structure includes the menuing instructions and not other data;
• and
• executing the menuing instructions in response to determining that the data structure includes the menuing instructions.