“…Other substantive changes include removing the discussion of registration mechanisms, (now specified in "IANA Registration of Enumservices: Guide, Template, and IANA Considerations" [RFC6117]), correcting an existing error by adding "-" as a valid character in the type and subtype fields specified in Services Parameters (Section 3.4.3) and adding the "P-" private service type (Section 3.4.3.1). …”