Printer, printing system, print control method, storage medium used to store print control program for controlling a printer, and transmission device for transmitting print control program for controlling a printer

A printing system in which an upper apparatus and a print control apparatus are connected via a communication medium,

• wherein said print control apparatus comprises:
• an input unit arranged for inputting, as a print job, print data received from said upper apparatus to which header information on the print data is added;
• a preprocessor unit arranged for storing the print data of the print job input by said input unit in a print data storage area in accordance with the header information;
• a manager unit arranged for managing print job identification information that identifies the print job, in correspondence to the print data stored in the print data storage area;
• an interpreter unit arranged for interpreting the print data stored in the print data storage area;
• and
• a print data invalidation unit arranged for, in response to an instruction to cancel a designated print job, invalidating the print data that corresponds to the print job identification information managed by said manager unit for the designated print job among print data stored in the print data storage area.

A print control method for a print control apparatus, comprising:

• an input step of inputting, as a print job, print data to which header information on the print data is added;
• a preprocessing step of storing the print data of the print job input in said input step in a print data storage area in accordance with the header information;
• a management step of managing print job identification information that identifies the print job, in correspondence to the print data stored in the print data storage area;
• an interpreting step of interpreting the print data stored in the print storage area;
• and
• a print data invalidation step of invalidating the print data that corresponds to the print job identification information managed in said management step for a designated print job among print data stored in the print data storage area in response to an instruction to cancel the designated print job.

A storage medium on which is stored a print control program for controlling a print control apparatus, said print control program comprising code for:

• an input step of inputting, as a print job, print data to which header information on the print data is added;
• a preprocessing step of storing the print data of the print job input in said input step in a print data storage area in accordance with the header information;
• a management step of managing print job identification information that identifies the print job, in correspondence with the print data stored in the print data storage area;
• an interpreting step of interpreting the print data stored in the print storage area;
• and
• a print data invalidation step of invalidating the print data that corresponds to the print job identification information managed in said management step for a designated print job among print data stored in the print data storage area in response to an instruction to cancel the designated print job.

A print control apparatus comprising:

• an input unit arranged for inputting, as a print job, data indicating a start of the print job and print data to which header information on the print data is added;
• an assignor unit arranged for assigning print job identification information that identifies the print job, in response to the data indicating the start of the print job;
• a preprocessor unit arranged for storing the print data of the print job in a print data storage area in accordance with the header information;
• and
• an interpreter unit arranged for interpreting the print data stored in the print data storage area,
• wherein, in response to an instruction to cancel a print job, said preprocessor unit abandons the print data that corresponds to the print job identification information of a designated print job.

A print control method for a print control apparatus comprising:

• an input step of inputting, as a print job, data indicating a start of the print job and print data to which header information on the print data is added;
• an assignment step of assigning print job identification information that identifies the print job, in response to the data indicating the start of the print job;
• a preprocessing step of storing the print data of the print job in a print data storage area in accordance with the header information;
• and
• an interpreting step of interpreting the print data stored in the print data storage area,
• wherein, in response to an instruction to cancel a print job, the print data that corresponds to the print job identification information of a designated print job is abandoned in said preprocessing step.