Recommendation ITU-T T.86 | ISO/IEC 10918-4 provides for the unique registration of JPEG and SPIFF Profiles, SPIFF Tags, SPIFF colour Spaces, application-specific Markers, SPIFF Compression types and images registration authorities as defined in Rec. ITU-T T.81 | ISO/IEC 10918-1 and Rec. ITU-T T.84 | ISO/IEC 10918-3.

New Annex D contains a list of currently known application markers (APPn). The intended use of this list is to aid in the identification of APPn markers that are known to be commonly used.