Contents reproduction apparatus, contents reproduction method, and contents reproduction program

A contents reproduction method comprising:

• a file identifier generation step of generating file identifiers that uniquely determine a plurality of contents files respectively which are hierarchically stored in an external storage device;
• an identification information generation step of generating identification information to identify the respective contents files based on part of additional data related to the contents files and the file identifiers;
• a list forming step of forming a list by re-arraying the identification information with the part of additional data set as the re-array condition;
• and
• a reproduction step of reading out and reproducing the contents files which are identified by the file identifiers of the respective identification information from the external storage device in accordance with the order of the identification information in the list.

A contents reproduction apparatus comprising:

• a file identifier generation unit that generates file identifiers that uniquely determine a plurality of contents files respectively which are hierarchically stored in an external storage device;
• an identification information generation unit that generates identification information to identify the respective contents files based on part of additional data related to the contents files and the file identifiers;
• a list forming unit that forms a list by re-arraying the identification information with the part of additional data set as the re-array condition;
• and
• a reproduction unit that reads out and reproduces the contents files which are identified by the file identifiers of the respective identification information from the external storage device in accordance with the order of the identification information in the list.