%% You should probably cite draft-ietf-enum-validation-arch instead of this I-D.
@techreport{mayrhofer-enum-validation-arch-00,
    number =    {draft-mayrhofer-enum-validation-arch-00},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-mayrhofer-enum-validation-arch/00/},
    author =    {Alex Mayrhofer and Bernie Hoeneisen},
    title =     {{ENUM Validation Architecture}},
    pagetotal = 16,
    year =      2005,
    month =     jul,
    day =       11,
    abstract =  {An ENUM domain name is tightly coupled with the underlying E.164 number. The process of verifying whether or not the Registrant of an ENUM domain name is identical to the Assignee of the corresponding E.164 number is commonly called "validation". This document describes validation requirements and a high level architecture for an ENUM validation infrastructure.},
}