This Technical Report lists the standard data link layer protocols that utilize HDLC based classes of procedures as defined in ISO/IEC 13239 in their realization. The list indicates the basic repertoire (i.e. class of procedures) used plus the optional functions employed. This Technical Report lists the standard XID information field format identifiers. The list identifies the source document as well as describing the characteristics of the information provided. This Technical Report lists the standard mode-setting frame information field format identifiers. The list identifies the source document as well as describing the characteristics of the information provided. This Technical Report lists the standard user-defined parameter set identification values, as well as indicating the source and use of the private parameter set. NOTE - With the exception of ISO/IEC 7776 and ITU-T X.25 LAPB, which are designed to be complementary, the protocols listed do not interwork. (There are differences in the usage of certain functions by different protocols.)