A computer readable medium may have a data structure for managing reproduction of a data stream including a navigation area for storing navigation data associated with the data stream representing a portion of at least one reproduction path, the navigation data including data of minimum extent size and indication information, the indication information for indicating whether the data stream represents multiple reproduction paths or the data stream represents a single reproduction path. The navigation data may include path number information and an indicator associated with each reproduction path, the path number information for identifying path numbers respectively of the multiple reproduction paths, and the indicator for indicating a file associated with the associated one of the multiple reproduction paths.