The network address types are enumerated data types which are defined in the nwdsdefs.h and nwdsdefs.inc files.
The NT_URL address type was added so that LDAP referrals could be integrated with eDirectory and added to eDirectory referral lists. The address conforms to the format of all other network address types: uint32 for type, uint32 for the size in bytes of the address, and a data buffer for the address. Since a standard URL is a string with UTF-8 characters, the LDAP server in NDS 8 converts the URL address to Unicode and stores it in eDirectory as a Unicode string. See RFC 2044, RFC 2255, RFC 1738 for more information.