{PDF} SCSI Architecture Model – 3 (SAM-3 r13) T10 Technical Committee, Ralph O. Weber tech. editor

The purpose of this standard is to provide a basis for the coordination of SCSI standards development and to
define requirements, common to all SCSI technologies and implementations that are essential for compatibility with host SCSI application software and device-resident firmware across all SCSI transport protocols. These requirements are defined through a reference model that specifies the behavior and abstract structure that is generic to all SCSI I/O system implementations.