Network Working Group R. Mahy
Request for Comments: 5333 Unaffiliated
Category: Standards Track B. Hoeneisen
IANA Registration of Enumservices for Internet Calendaring
This document registers Enumservices for Internet calendaring.
Specifically, this document focuses on Enumservices for scheduling
with iMIP (iCalendar Message-Based Interoperability Protocol) and for
accessing Internet calendaring information with CalDAV (Calendaring
Extensions to WebDAV).
Status of This Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Copyright and License Notice
Copyright (c) 2009 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the BSD License.
This document may contain material from IETF Documents or IETF
Contributions published or made publicly available before November
10, 2008. The person(s) controlling the copyright in some of this
material may not have granted the IETF Trust the right to allow
modifications of such material outside the IETF Standards Process.
Without obtaining an adequate license from the person(s) controlling
the copyright in such materials, this document may not be modified
outside the IETF Standards Process, and derivative works of it may
Mahy & Hoeneisen Standards Track [Page 1]RFC 5333 Internet Calendaring Enumservices October 2009
not be created outside the IETF Standards Process, except to format
it for publication as an RFC or to translate it into languages other
ENUM (E.164 Number Mapping, RFC 3761 ) is a system that uses DNS
(Domain Name System, RFC 1034 ) to translate telephone numbers,
such as '+12025550100', into URIs (Uniform Resource Identifiers, RFC
3986 ), such as 'mailto:firstname.lastname@example.org'. ENUM exists primarily
to facilitate the interconnection of systems that rely on telephone
numbers with those that use URIs to identify resources. The ENUM
registration here could be used to allow phones, for example, to
check the free/busy status of a user in their address book or propose
a meeting with him or her from the user's phone number.
The Guide to Internet Calendaring  describes the relationship
between various Internet calendaring specifications like this:
"iCalendar  is the language used to describe calendar objects.
iTIP  [iCalendar Transport-Independent Interoperability Protocol]
describes a way to use the iCalendar language to do scheduling. iMIP
 [iCalendar Message-Based Interoperability Protocol] describes how
to do iTIP scheduling via e-mail".
Recently, another Standards Track protocol for calendar and
scheduling access has appeared. CalDAV (Calendaring Extensions to
WebDAV)  is a WebDAV (Web-based Distributed Authoring and
Versioning)  based mechanism for manipulating Internet calendars,
viewing free/busy lists, and via a planned scheduling extension ,
could be used for proposing calendar events as well in the future.
The existing 'mailto:' URI scheme (defined in RFC 3986 ) is
already used to address iMIP compatible Calendar Services. Likewise,
the existing 'http:' and 'https:' URI schemes (defined in RFC 2616
 and RFC 2818 ) are already used to address CalDAV compatible
This document registers Enumservices for scheduling and accessing
Internet calendaring information associated with an E.164 number.
Mahy & Hoeneisen Standards Track [Page 2]RFC 5333 Internet Calendaring Enumservices October 2009