Documents by B. Hoeneisen
2002, RFC3327: Session Initiation Protocol (SIP) Extension Header Field for Registering Non-Adjacent Contacts
2003, RFC3608: Session Initiation Protocol (SIP) Extension Header Field for Service Route Discovery During Registration
2006, RFC4725: ENUM Validation Architecture
2009, RFC5333: IANA Registration of Enumservices for Internet Calendaring
2011, RFC6118: Update of Legacy IANA Registrations of Enumservices