16. The storage device according to claim 12 containing: description information describing details of multimedia contents and including a keyword, wherein said description information includes: description data describing details of said multimedia contents using reference information for specifying said keyword instead of using said keyword; and a list correlating said keyword with said added ID information such that when said storage medium is read out by an information processing apparatus, the information processing apparatus is configured so as to obtain, in response to a selection of a keyword, added ID information specifying the selected keyword from the description information and to retrieve a position of the selected keyword in said multimedia contents based on the obtained added ID information.
20. The storage device according to claim 16 , wherein said description data includes position data representing a specific position, in said multimedia contents, of the same keyword as said keyword described using said added ID information.