Specifies the volume and file structure of compact read-only optical disks (CD-ROM) for the information interchange between information processing systems. Defines: the attributes of the volume and the descriptors recorded on it; the relationship among volumes of a volume set; the placement of files; the attributes of the files; recorded structures intended for input or output data streams of an application program when required to be organized as sets of records; three nested levels of medium interchange; two nested levels of implementation; requirements for the processes provided within information processing systems.