Program specific information formation for digital data processing

Programs specific information (PSI) is formed suitable for use in recovering data content of a program in the form of a packetized datastream. A program map information (PMT) is created that associates packet identifiers (PIDs) with individual packetized datastreams that constitute said program. Furthermore, the program map information (PMT) associates individual programs with one or more private data elements describing a program, selected from title, duration, program description, violence rating, age suitability rating, time of recording, date of recording and version list. The program map information (PMT) allows said private data elements of individual programs to be acquired without acquisition of additional PSI data. Program association information is created that associates the program with PIDs that identify packets comprising the program map information (PMT). Network information may be created and one or more of the private data elements may be incorporated in this network information.