Patent ID: 8437604

Claim:
An information process apparatus that manages data recorded on a disc record medium, comprising: first generation means for generating management information that associates a first identifier, that can identify the data in any storage area external to the disc record medium, with information about the data; second generation means for generating a second identifier that can identify the data only in a storage area of the disc record medium, the data amount of the second identifier being smaller than that of the first identifier; addition means for adding the second identifier generated by the second generation means to the management information to associate the second identifier with the information about the data; and record means for recording the management information, to which the second identifier has been added by the addition means, on the disc record medium, wherein the information processing apparatus references the data in any storage area external to the disc record medium with only the first identifier and references the data only in the storage area of the disc record medium with either of the first identifier and the second identifier.