Implemented Standards
*********************


Present
=======

* "dNSName" with fallback to "CN" (DNS-ID, aka host names, RFC
  6125).

* "iPAddress" (RFC 2818).

* "uniformResourceIdentifier" (URI-ID, RFC 6125).

* SRV-ID (RFC 6125)


Future
======

* "xmppAddr" (RFC 3920).

* "nameConstraints" extensions (RFC 3280).
