The release of SCORM 2004 (Sharable Content Object Reference Model) represents a moment of stability, according to official statements from the Advanced Distributed Learning Initiative ( http://www.adlnet.org ). ADL derived its initial SCORM 2004 "Sequencing and the Navigation" book on the IMS GLS Simple Sequencing specification, version 1.0, and then developed refinements that permit its integration with the other parts of SCORM. This version of the document suite realizes the functionality originally imagined as a necessary baseline capability. Changes are expected to be minimal, repairing small pieces when bugs are identified, decreasing in frequency and scope over time.