1. A digital television signal for use in a digital television receiver to receive program and system information protocol (PSIP) data from a broadcast transmitter, the digital television signal comprising: a rating region table containing the PSIP data, wherein the rating region table includes: a global rating value field defining a global rating value which is valid for all graphical rating regions; a rating region field defining a specific graphical rating region to be associated with the rating region table; and at least one local rating value field identifying a local rating value which is valid for the specific graphical rating region only.