Resources
NAPTR Resource Records (RFC 2915)
http://www.ietf.org/rfc/rfc2915.txt
ENUM Specification (RFC 2916)
http://www.ietf.org/rfc/rfc2916.txt
Liaison Statement (RFC 3026)
http://www.ietf.org/rfc/rfc3026.txt
IAB on need for unique root (RFC 2826)
http://www.ietf.org/rfc/rfc2826.txt
IAB Statement on ARPA
http://www.iab.org/iab/DOCUMENTS/statement-on-infrastructure-domains.txt
My email address: paf@cisco.com