to identify and use other character encodings through use of an
"encoding" attribute in an <?xml?> declaration, use of UTF-8 is
RECOMMENDED in environments where parser encoding support
incompatibility exists.
As an extension of the EPP domain mapping [1], the elements, element
content, attributes, and attribute values described in this document
MUST inherit the internationalization conventions used to represent
higher-layer domain and core protocol structures present in an XML
instance that includes this extension.
6. IANA Considerations
This document uses URNs to describe XML namespaces and XML schemas
conforming to a registry mechanism described in RFC 3688 [9]. Two
URI assignments have been completed by the IANA:
Registration for the extension namespace:
URI: urn:ietf:params:xml:ns:e164epp-1.0
Registrant Contact: IESG
XML: None. Namespace URIs do not represent an XML specification.
Registration for the extension XML schema:
URI: urn:ietf:params:xml:schema:e164epp-1.0
Registrant Contact: IESG
XML: See the "Formal Syntax" section of this document.
7. Security Considerations
The mapping extensions described in this document do not provide any
security services beyond those described by EPP [5], the EPP domain
name mapping [1], and protocol layers used by EPP. Security
considerations related to ENUM are described in the "Security
Considerations" section of the ENUM specification [6]; security
considerations related to the Dynamic Delegation Discovery System and
NAPTR records are described in the "Security Considerations" section
of RFC 3403 [8]. The security considerations described in these
specifications apply to this specification as well.
As with other domain object transforms, the EPP transform operations
described in this document MUST be restricted to the sponsoring
client as authenticated using the mechanisms described in sections
2.9.1.1 and 7 of RFC 3730 [5]. Any attempt to perform a transform
operation on a domain object by any client other than the sponsoring
client MUST be rejected with an appropriate EPP authorization error.
8. Acknowledgements
The author would like to thank the following people who have provided
significant contributions to the development of this document:
Lawrence Conroy, Edward Lewis, Michael Mealling, Allison Mankin, Chip
Sharp, and James Yu.
9. References
9.1. Normative References
[1] Hollenbeck, S., "Extensible Provisioning Protocol (EPP) Domain
Name Mapping", RFC 3731, March 2004.
[2] Paoli, J., Sperberg-McQueen, C., Bray, T., and E. Maler,
"Extensible Markup Language (XML) 1.0 (Second Edition)", W3C
FirstEdition REC-xml-20001006, October 2000.
[3] Maloney, M., Beech, D., Mendelsohn, N., and H. Thompson, "XML
Schema Part 1: Structures", W3C REC REC-xmlschema-1-20010502,
May 2001.
[4] Malhotra, A. and P. Biron, "XML Schema Part 2: Datatypes", W3C
REC REC-xmlschema-2-20010502, May 2001.
[5] Hollenbeck, S., "Extensible Provisioning Protocol (EPP)", RFC
3730, March 2004.
[6] Faltstrom, P. and M. Mealling, "The E.164 to Uniform Resource
Identifiers (URI) Dynamic Delegation Discovery System (DDDS)
Application (ENUM)", RFC 3761, April 2004.
[7] Bradner, S., "Key words for use in RFCs to Indicate Requirement
Levels", BCP 14, RFC 2119, March 1997.
[8] Mealling, M., "Dynamic Delegation Discovery System (DDDS) Part
Three: The Domain Name System (DNS) Database", RFC 3403, October
2002.
[9] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688, January
2004.
9.2. Informative References
[10] Yergeau, F., "UTF-8, a transformation format of ISO 10646", STD
63, RFC 3629, November 2003.
[11] Hoffman, P. and F. Yergeau, "UTF-16, an encoding of ISO 10646",
RFC 2781, February 2000.
Author’s Address
Scott Hollenbeck
VeriSign, Inc.
21345 Ridgetop Circle
Dulles, VA 20166-6503
US
EMail: shollenbeck@verisign.com
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