draft-ietf-dnsext-insensitive-05.txt		draft-ietf-dnsext-insensitive-06.txt
	INTERNET-DRAFT Donald E. Eastlake 3rd		INTERNET-DRAFT Donald E. Eastlake 3rd
	Updates RFC 1034, 1035 Motorola Laboratories		Updates RFC 1034, 1035 Motorola Laboratories
	Expires July 2005 January 2005		Expires January 2006 July 2005
	Domain Name System (DNS) Case Insensitivity Clarification		Domain Name System (DNS) Case Insensitivity Clarification
	------ ---- ------ ----- ---- ------------- -------------		------ ---- ------ ----- ---- ------------- -------------
	<draft-ietf-dnsext-insensitive-05.txt>		<draft-ietf-dnsext-insensitive-06.txt>
	Donald E. Eastlake 3rd		Donald E. Eastlake 3rd
	Status of This Document		Status of This Document
	By submitting this Internet-Draft, I certify that any applicable		By submitting this Internet-Draft, each author represents that any
	patent or other IPR claims of which I am aware have been disclosed,		applicable patent or other IPR claims of which he or she is aware
	or will be disclosed, and any of which I become aware will be		have been or will be disclosed, and any of which he or she becomes
	disclosed, in accordance with RFC 3668.		aware will be disclosed, in accordance with Section 6 of BCP 79.
	Distribution of this document is unlimited. Comments should be sent		Distribution of this document is unlimited. Comments should be sent
	to the DNSEXT working group at namedroppers@ops.ietf.org.		to the DNSEXT working group at namedroppers@ops.ietf.org.
	Internet-Drafts are working documents of the Internet Engineering		Internet-Drafts are working documents of the Internet Engineering
	Task Force (IETF), its areas, and its working groups. Note that		Task Force (IETF), its areas, and its working groups. Note that
	other groups may also distribute working documents as Internet-		other groups may also distribute working documents as Internet-
	Drafts.		Drafts.
	Internet-Drafts are draft documents valid for a maximum of six months		Internet-Drafts are draft documents valid for a maximum of six months
	skipping to change at page 1, line 41		skipping to change at page 1, line 41
	material or to cite them other than a "work in progress."		material or to cite them other than a "work in progress."
	The list of current Internet-Drafts can be accessed at		The list of current Internet-Drafts can be accessed at
	http://www.ietf.org/1id-abstracts.html		http://www.ietf.org/1id-abstracts.html
	The list of Internet-Draft Shadow Directories can be accessed at		The list of Internet-Draft Shadow Directories can be accessed at
	http://www.ietf.org/shadow.html		http://www.ietf.org/shadow.html
	Copyright Notice		Copyright Notice
	Copyright (C) The Internet Society. All Rights Reserved.		Copyright (C) The Internet Society (2005). All Rights Reserved.
	Abstract		Abstract
	Domain Name System (DNS) names are "case insensitive". This document		Domain Name System (DNS) names are "case insensitive". This document
	explains exactly what that means and provides a clear specification		explains exactly what that means and provides a clear specification
	of the rules. This clarification updates RFCs 1034 and 1035.		of the rules. This clarification updates RFCs 1034 and 1035.
	INTERNET-DRAFT DNS Case Insensitivity		INTERNET-DRAFT DNS Case Insensitivity
	Acknowledgements		Acknowledgements
	skipping to change at page 2, line 35		skipping to change at page 2, line 35
	2.1 Escaping Unusual DNS Label Octets......................3		2.1 Escaping Unusual DNS Label Octets......................3
	2.2 Example Labels with Escapes............................4		2.2 Example Labels with Escapes............................4
	3. Name Lookup, Label Types, and CLASS.....................4		3. Name Lookup, Label Types, and CLASS.....................4
	3.1 Original DNS Label Types...............................5		3.1 Original DNS Label Types...............................5
	3.2 Extended Label Type Case Insensitivity Considerations..5		3.2 Extended Label Type Case Insensitivity Considerations..5
	3.3 CLASS Case Insensitivity Considerations................5		3.3 CLASS Case Insensitivity Considerations................5
	4. Case on Input and Output................................6		4. Case on Input and Output................................6
	4.1 DNS Output Case Preservation...........................6		4.1 DNS Output Case Preservation...........................6
	4.2 DNS Input Case Preservation............................6		4.2 DNS Input Case Preservation............................6
	5. Internationalized Domain Names..........................7		5. Internationalized Domain Names..........................7
	6. Security Considerations.................................7		6. Security Considerations.................................8
	Full Copyright Notice and Disclaimer.......................9		Copyright and Disclaimer...................................9
	Normative References.......................................9		Normative References.......................................9
	Informative References....................................10		Informative References....................................10
	-02 to -03 Changes........................................10
			Changes Between Draft Version.............................11
			-02 to -03 Changes........................................11
	-03 to -04 Changes........................................11		-03 to -04 Changes........................................11
	-04 to -05 Changes........................................11		-04 to -05 Changes........................................11
	Author's Address..........................................11		-05 to -06 Changes........................................12
	Expiration and File Name..................................12
			Author's Address..........................................13
			Expiration and File Name..................................13
	INTERNET-DRAFT DNS Case Insensitivity		INTERNET-DRAFT DNS Case Insensitivity
	1. Introduction		1. Introduction
	The Domain Name System (DNS) is the global hierarchical replicated		The Domain Name System (DNS) is the global hierarchical replicated
	distributed database system for Internet addressing, mail proxy, and		distributed database system for Internet addressing, mail proxy, and
	other information. Each node in the DNS tree has a name consisting of		other information. Each node in the DNS tree has a name consisting of
	zero or more labels [STD 13][RFC 1591, 2606] that are treated in a		zero or more labels [STD 13][RFC 1591, 2606] that are treated in a
	case insensitive fashion. This document clarifies the meaning of		case insensitive fashion. This document clarifies the meaning of
	skipping to change at page 4, line 39		skipping to change at page 4, line 39
	The first example below shows embedded spaces and a period (".")		The first example below shows embedded spaces and a period (".")
	within a label. The second one show a 5-octet label where the second		within a label. The second one show a 5-octet label where the second
	octet has all bits zero, the third is a backslash, and the fourth		octet has all bits zero, the third is a backslash, and the fourth
	octet has all bits one.		octet has all bits one.
	Donald\032E\.\032Eastlake\0323rd.example.		Donald\032E\.\032Eastlake\0323rd.example.
	and a\000\\\255z.example.		and a\000\\\255z.example.
	3. Name Lookup, Label Types, and CLASS		3. Name Lookup, Label Types, and CLASS
	The design decision was made that comparisons on name lookup for all		The original DNS design decision was made that comparisons on name
	DNS queries should be case insensitive [STD 13]. That is to say, a		lookup for DNS queries should be case insensitive [STD 13]. That is
	lookup string octet with a value in the inclusive range of 0x41 to		to say, a lookup string octet with a value in the inclusive range of
	0x5A, the upper case ASCII letters, MUST match the identical value		0x41 to 0x5A, the upper case ASCII letters, MUST match the identical
	and also match the corresponding value in the inclusive range 0x61 to		value and also match the corresponding value in the inclusive range
	0x7A, the lower case ASCII letters. And a lookup string octet with a		0x61 to 0x7A, the lower case ASCII letters. And a lookup string octet
	lower case ASCII letter value MUST similarly match the identical		with a lower case ASCII letter value MUST similarly match the
	value and also match the corresponding value in the upper case ASCII		identical value and also match the corresponding value in the upper
	letter range.		case ASCII letter range.
	(Historical Note: the terms "upper case" and "lower case" were		(Historical Note: the terms "upper case" and "lower case" were
	invented after movable type. The terms originally referred to the		invented after movable type. The terms originally referred to the
	two font trays for storing, in partitioned areas, the different		two font trays for storing, in partitioned areas, the different
	physical type elements. Before movable type, the nearest equivalent		physical type elements. Before movable type, the nearest equivalent
	INTERNET-DRAFT DNS Case Insensitivity		INTERNET-DRAFT DNS Case Insensitivity
	terms were "majuscule" and "minuscule".)		terms were "majuscule" and "minuscule".)
	skipping to change at page 5, line 23		skipping to change at page 5, line 23
	that the DNS case insensitivity does NOT correspond to the case		that the DNS case insensitivity does NOT correspond to the case
	folding specified in [iso-8859-1] or [iso-8859-2]. For example, the		folding specified in [iso-8859-1] or [iso-8859-2]. For example, the
	octets 0xDD (\221) and 0xFD (\253) do NOT match although in other		octets 0xDD (\221) and 0xFD (\253) do NOT match although in other
	contexts, where they are interpreted as the upper and lower case		contexts, where they are interpreted as the upper and lower case
	version of "Y" with an acute accent, they might.		version of "Y" with an acute accent, they might.
	3.1 Original DNS Label Types		3.1 Original DNS Label Types
	DNS labels in wire-encoded names have a type associated with them.		DNS labels in wire-encoded names have a type associated with them.
	The original DNS standard [RFC 1035] had only two types. ASCII		The original DNS standard [RFC 1035] had only two types. ASCII
	labels, with a length of from zero to 63 octets, and indirect labels		labels, with a length of from zero to 63 octets, and indirect (or
	which consist of an offset pointer to a name location elsewhere in		compression) labels which consist of an offset pointer to a name
	the wire encoding on a DNS message. (The ASCII label of length zero		location elsewhere in the wire encoding on a DNS message. (The ASCII
	is reserved for use as the name of the root node of the name tree.)		label of length zero is reserved for use as the name of the root node
	ASCII labels follow the ASCII case conventions described herein and,		of the name tree.) ASCII labels follow the ASCII case conventions
	as stated above, can actually contain arbitrary byte values. Indirect		described herein and, as stated above, can actually contain arbitrary
	labels are, in effect, replaced by the name to which they point which		byte values. Indirect labels are, in effect, replaced by the name to
	is then treated with the case insensitivity rules in this document.		which they point which is then treated with the case insensitivity
			rules in this document.
	3.2 Extended Label Type Case Insensitivity Considerations		3.2 Extended Label Type Case Insensitivity Considerations
	DNS was extended by [RFC 2671] to have additional label type numbers		DNS was extended by [RFC 2671] to have additional label type numbers
	available. (The only such type defined so far is the BINARY type [RFC		available. (The only such type defined so far is the BINARY type [RFC
	2673].)		2673] which is now Experimental [RFC 3363].)
	The ASCII case insensitivity conventions only apply to ASCII labels,		The ASCII case insensitivity conventions only apply to ASCII labels,
	that is to say, label type 0x0, whether appearing directly or invoked		that is to say, label type 0x0, whether appearing directly or invoked
	by indirect labels.		by indirect labels.
	3.3 CLASS Case Insensitivity Considerations		3.3 CLASS Case Insensitivity Considerations
	As described in [STD 13] and [RFC 2929], DNS has an additional axis		As described in [STD 13] and [RFC 2929], DNS has an additional axis
	for data location called CLASS. The only CLASS in global use at this		for data location called CLASS. The only CLASS in global use at this
	time is the "IN" or Internet CLASS.		time is the "IN" or Internet CLASS.
	The handling of DNS label case is not CLASS dependent.		The handling of DNS label case is not CLASS dependent. With the
			original design of DNS, it was intended that a recursive DNS resolver
	INTERNET-DRAFT DNS Case Insensitivity		INTERNET-DRAFT DNS Case Insensitivity
			be able to handle new CLASSes that were unknown at the time of its
			implementation. This requires uniform handling of label case
			insensitivity. Should it become desireable, for example, to allocate
			a CLASS with "case sensitive ASCII labels" for example, it would be
			necessary to allocate a new label type for these labels.
	4. Case on Input and Output		4. Case on Input and Output
	While ASCII label comparisons are case insensitive, [STD 13] says		While ASCII label comparisons are case insensitive, [STD 13] says
	case MUST be preserved on output, and preserved when convenient on		case MUST be preserved on output, and preserved when convenient on
	input. However, this means less than it would appear since the		input. However, this means less than it would appear since the
	preservation of case on output is NOT required when output is		preservation of case on output is NOT required when output is
	optimized by the use of indirect labels, as explained below.		optimized by the use of indirect labels, as explained below.
	4.1 DNS Output Case Preservation		4.1 DNS Output Case Preservation
	skipping to change at page 6, line 35		skipping to change at page 6, line 41
	optimize output, indirect labels may be used to point to names		optimize output, indirect labels may be used to point to names
	elsewhere in the DNS answer. In determining whether the name to be		elsewhere in the DNS answer. In determining whether the name to be
	pointed to, for example the QNAME, is the "same" as the remainder of		pointed to, for example the QNAME, is the "same" as the remainder of
	the name being optimized, the case insensitive comparison specified		the name being optimized, the case insensitive comparison specified
	above is done. Thus such optimization may easily destroy the output		above is done. Thus such optimization may easily destroy the output
	preservation of case. This type of optimization is commonly called		preservation of case. This type of optimization is commonly called
	"name compression".		"name compression".
	4.2 DNS Input Case Preservation		4.2 DNS Input Case Preservation
	Originally, DNS input came from an ASCII Master File as defined in		Originally, DNS data came from an ASCII Master File as defined in
	[STD 13] or a zone transfer. DNS Dynamic update and incremental zone		[STD 13] or a zone transfer. DNS Dynamic update and incremental zone
	transfers [RFC 1995] have been added as a source of DNS data [RFC		transfers [RFC 1995] have been added as a source of DNS data [RFC
	2136, 3007]. When a node in the DNS name tree is created by any of		2136, 3007]. When a node in the DNS name tree is created by any of
	such inputs, no case conversion is done. Thus the case of ASCII		such inputs, no case conversion is done. Thus the case of ASCII
	labels is preserved if they are for nodes being created. However,		labels is preserved if they are for nodes being created. However,
	when a name label is input for a node that already exist in DNS data		when a name label is input for a node that already exist in DNS data
	being held, the situation is more complex. Implementations may retain		being held, the situation is more complex. Implementations are free
	the case first input for such a label or allow new input to override		to retain the case first loaded for such a label or allow new input
	the old case or even maintain separate copies preserving the input		to override the old case or even maintain separate copies preserving
	case.
	For example, if data with owner name "foo.bar.example" is input and		INTERNET-DRAFT DNS Case Insensitivity
			the input case.
			For example, if data with owner name "foo.bar.example" is loaded and
	then later data with owner name "xyz.BAR.example" is input, the name		then later data with owner name "xyz.BAR.example" is input, the name
	of the label on the "bar.example" node, i.e. "bar", might or might		of the label on the "bar.example" node, i.e. "bar", might or might
	not be changed to "BAR" or the actual input case could be preserved.		not be changed to "BAR" in the DNS stored data or the actual input
	Thus later retrieval of data stored under "xyz.bar.example" in this		case could be preserved. Thus later retrieval of data stored under
	case can easily return data with "xyz.BAR.example". The same		"xyz.bar.example" in this case can return all data with
			"xyz.BAR.example" or all data with "xyz.bar.example" or even, when
	INTERNET-DRAFT DNS Case Insensitivity		more than one RR is being returned, a mixture of these two cases.
			This last case is unlikely because optimization of answer length
			through indirect labels tends to cause only copy of the name tail
			("bar.example" or "BAR.example") to be used for all returned RRs.
			Note that none of this has any effect on the number of completeness
			of the RR set returned, only on the case of the names in the RR set
			returned.
	considerations apply when inputting multiple data records with owner		The same considerations apply when inputting multiple data records
	names differing only in case. For example, if an "A" record is stored		with owner names differing only in case. For example, if an "A"
	as the first resourced record under owner name "xyz.BAR.example" and		record is the first resourced record stored under owner name
	then a second "A" record is stored under "XYZ.BAR.example", the		"xyz.BAR.example" and then a second "A" record is stored under
	second MAY be stored with the first (lower case initial label) name		"XYZ.BAR.example", the second MAY be stored with the first (lower
	or the second MAY override the first so that only an upper case		case initial label) name or the second MAY override the first so that
	initial label is retained or both capitalizations MAY be kept.		only an upper case initial label is retained or both capitalizations
			MAY be kept in the DNS stored data. In any case, a retrieval with
			either capitalization will retrieve all RRs with either
			capitalization.
	Note that the order of insertion into a server database of the DNS		Note that the order of insertion into a server database of the DNS
	name tree nodes that appear in a Master File is not defined so that		name tree nodes that appear in a Master File is not defined so that
	the results of inconsistent capitalization in a Master File are		the results of inconsistent capitalization in a Master File are
	unpredictable output capitalization.		unpredictable output capitalization.
	5. Internationalized Domain Names		5. Internationalized Domain Names
	A scheme has been adopted for "internationalized domain names" and		A scheme has been adopted for "internationalized domain names" and
	"internationalized labels" as described in [RFC 3490, 3454, 3491, and		"internationalized labels" as described in [RFC 3490, 3454, 3491, and
	3492]. It makes most of [UNICODE] available through a separate		3492]. It makes most of [UNICODE] available through a separate
	application level transformation from internationalized domain name		application level transformation from internationalized domain name
	to DNS domain name and from DNS domain name to internationalized		to DNS domain name and from DNS domain name to internationalized
	domain name. Any case insensitivity that internationalized domain		domain name. Any case insensitivity that internationalized domain
	names and labels have varies depending on the script and is handled		names and labels have varies depending on the script and is handled
	entirely as part of the transformation described in [RFC 3454] and		entirely as part of the transformation described in [RFC 3454] and
	[RFC 3491] which should be seen for further details. This is not a		[RFC 3491] which should be seen for further details. This is not a
	part of the DNS as standardized in STD 13.		part of the DNS as standardized in STD 13.
			INTERNET-DRAFT DNS Case Insensitivity
	6. Security Considerations		6. Security Considerations
	The equivalence of certain DNS label types with case differences, as		The equivalence of certain DNS label types with case differences, as
	clarified in this document, can lead to security problems. For		clarified in this document, can lead to security problems. For
	example, a user could be confused by believing two domain names		example, a user could be confused by believing two domain names
	differing only in case were actually different names.		differing only in case were actually different names.
	Furthermore, a domain name may be used in contexts other than the		Furthermore, a domain name may be used in contexts other than the
	DNS. It could be used as a case sensitive index into some data base		DNS. It could be used as a case sensitive index into some data base
	system. Or it could be interpreted as binary data by some integrity		or file system. Or it could be interpreted as binary data by some
	or authentication code system. These problems can usually be handled		integrity or authentication code system. These problems can usually
	by using a standardized or "canonical" form of the DNS ASCII type		be handled by using a standardized or "canonical" form of the DNS
	labels, that is, always mapping the ASCII letter value octets in		ASCII type labels, that is, always mapping the ASCII letter value
	ASCII labels to some specific pre-chosen case, either upper case or		octets in ASCII labels to some specific pre-chosen case, either upper
	lower case. An example of a canonical form for domain names (and also		case or lower case. An example of a canonical form for domain names
	a canonical ordering for them) appears in Section 8 of [RFC 2535].		(and also a canonical ordering for them) appears in Section 6 of [RFC
	See also [RFC 3597].		4034]. See also [RFC 3597].
	Finally, a non-DNS name may be stored into DNS with the false		Finally, a non-DNS name may be stored into DNS with the false
	expectation that case will always be preserved. For example, although		expectation that case will always be preserved. For example, although
	INTERNET-DRAFT DNS Case Insensitivity
	this would be quite rare, on a system with case sensitive email		this would be quite rare, on a system with case sensitive email
	address local parts, an attempt to store two "RP" records that		address local parts, an attempt to store two "RP" records that
	differed only in case would probably produce unexpected results that		differed only in case would probably produce unexpected results that
	might have security implications. That is because the entire email		might have security implications. That is because the entire email
	address, including the possibly case sensitive local or left hand		address, including the possibly case sensitive local or left hand
	part, is encoded into a DNS name in a readable fashion where the case		part, is encoded into a DNS name in a readable fashion where the case
	of some letters might be changed on output as described above.		of some letters might be changed on output as described above.
	INTERNET-DRAFT DNS Case Insensitivity		INTERNET-DRAFT DNS Case Insensitivity
	Full Copyright Notice and Disclaimer		Copyright and Disclaimer
	Copyright (C) The Internet Society 2005. This document is subject to		Copyright (C) The Internet Society (2005). This document is subject
	the rights, licenses and restrictions contained in BCP 78 and except		to the rights, licenses and restrictions contained in BCP 78, and
	as set forth therein, the authors retain all their rights.		except as set forth therein, the authors retain all their rights.
	This document and the information contained herein are provided on an		This document and the information contained herein are provided on an
	"AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS		"AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS
	OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY AND THE INTERNET		OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY AND THE INTERNET
	ENGINEERING TASK FORCE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED,		ENGINEERING TASK FORCE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED,
	INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE		INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE
	INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED		INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED
	WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.		WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
	Normative References		Normative References
	skipping to change at page 9, line 37		skipping to change at page 9, line 37
	[RFC 1995] - M. Ohta, "Incremental Zone Transfer in DNS", August		[RFC 1995] - M. Ohta, "Incremental Zone Transfer in DNS", August
	1996.		1996.
	[RFC 2119] - S. Bradner, "Key words for use in RFCs to Indicate		[RFC 2119] - S. Bradner, "Key words for use in RFCs to Indicate
	Requirement Levels", March 1997.		Requirement Levels", March 1997.
	[RFC 2136] - P. Vixie, Ed., S. Thomson, Y. Rekhter, J. Bound,		[RFC 2136] - P. Vixie, Ed., S. Thomson, Y. Rekhter, J. Bound,
	"Dynamic Updates in the Domain Name System (DNS UPDATE)", April 1997.		"Dynamic Updates in the Domain Name System (DNS UPDATE)", April 1997.
	[RFC 2535] - D. Eastlake, "Domain Name System Security Extensions",
	March 1999.
	[RFC 3007] - B. Wellington, "Secure Domain Name System (DNS) Dynamic		[RFC 3007] - B. Wellington, "Secure Domain Name System (DNS) Dynamic
	Update", November 2000.		Update", November 2000.
	[RFC 3597] - Andreas Gustafsson, "Handling of Unknown DNS RR Types",		[RFC 3597] - Andreas Gustafsson, "Handling of Unknown DNS RR Types",
	draft-ietf-dnsext-unknown-rrs-05.txt, March 2003.		draft-ietf-dnsext-unknown-rrs-05.txt, March 2003.
			[RFC 4034} - Arends, R., Austein, R., Larson, M., Massey, D., and S.
			Rose, "Resource Records for the DNS Security Extensions", RFC 4034,
			March 2005.
	[STD 13]		[STD 13]
	- P. Mockapetris, "Domain names - concepts and facilities", RFC		- P. Mockapetris, "Domain names - concepts and facilities", RFC
	1034, November 1987.		1034, November 1987.
	- P. Mockapetris, "Domain names - implementation and		- P. Mockapetris, "Domain names - implementation and
	specification", RFC 1035, November 1987.		specification", RFC 1035, November 1987.
	INTERNET-DRAFT DNS Case Insensitivity		INTERNET-DRAFT DNS Case Insensitivity
	Informative References		Informative References
	skipping to change at page 10, line 33		skipping to change at page 10, line 33
	[RFC 2671] - P. Vixie, "Extension mechanisms for DNS (EDNS0)", August		[RFC 2671] - P. Vixie, "Extension mechanisms for DNS (EDNS0)", August
	1999.		1999.
	[RFC 2673] - M. Crawford, "Binary Labels in the Domain Name System",		[RFC 2673] - M. Crawford, "Binary Labels in the Domain Name System",
	August 1999.		August 1999.
	[RFC 3092] - D. Eastlake 3rd, C. Manros, E. Raymond, "Etymology of		[RFC 3092] - D. Eastlake 3rd, C. Manros, E. Raymond, "Etymology of
	Foo", 1 April 2001.		Foo", 1 April 2001.
			[RFC 3363] - Bush, R., Durand, A., Fink, B., Gudmundsson, O., and T.
			Hain, "Representing Internet Protocol version 6 (IPv6) Addresses in
			the Domain Name System (DNS)", RFC 3363, August 2002.
	[RFC 3454] - P. Hoffman, M. Blanchet, "Preparation of		[RFC 3454] - P. Hoffman, M. Blanchet, "Preparation of
	Internationalized String ("stringprep")", December 2002.		Internationalized String ("stringprep")", December 2002.
	[RFC 3490] - P. Faltstrom, P. Hoffman, A. Costello,		[RFC 3490] - P. Faltstrom, P. Hoffman, A. Costello,
	"Internationalizing Domain Names in Applications (IDNA)", March 2003.		"Internationalizing Domain Names in Applications (IDNA)", March 2003.
	[RFC 3491] - P. Hoffman, M. Blanchet, "Nameprep: A Stringprep Profile		[RFC 3491] - P. Hoffman, M. Blanchet, "Nameprep: A Stringprep Profile
	for Internationalized Domain Names (IDN)", March 2003.		for Internationalized Domain Names (IDN)", March 2003.
	[RFC 3492] - A. Costello, "Punycode: A Bootstring encoding of Unicode		[RFC 3492] - A. Costello, "Punycode: A Bootstring encoding of Unicode
	for Internationalized Domain Names in Applications (IDNA)", March		for Internationalized Domain Names in Applications (IDNA)", March
	2003.		2003.
	[UNICODE] - The Unicode Consortium, "The Unicode Standard",		[UNICODE] - The Unicode Consortium, "The Unicode Standard",
	<http://www.unicode.org/unicode/standard/standard.html>.		<http://www.unicode.org/unicode/standard/standard.html>.
			INTERNET-DRAFT DNS Case Insensitivity
			Changes Between Draft Version
			RFC Editor: The following summaries of changes between draft versions
			are to be removed before publication.
	-02 to -03 Changes		-02 to -03 Changes
	The following changes were made between draft version -02 and -03:		The following changes were made between draft version -02 and -03:
	1. Add internationalized domain name section and references.		1. Add internationalized domain name section and references.
	INTERNET-DRAFT DNS Case Insensitivity
	2. Change to indicate that later input of a label for an existing DNS		2. Change to indicate that later input of a label for an existing DNS
	name tree node may or may not be normalized to the earlier input or		name tree node may or may not be normalized to the earlier input or
	override it or both may be preserved.		override it or both may be preserved.
	3. Numerous minor wording changes.		3. Numerous minor wording changes.
	-03 to -04 Changes		-03 to -04 Changes
	The following changes were made between draft versions -03 and -04:		The following changes were made between draft versions -03 and -04:
	skipping to change at page 11, line 39		skipping to change at page 12, line 5
	The following changes were made between draft versions -04 and -05:		The following changes were made between draft versions -04 and -05:
	1. More clearly state that this draft updates RFCs 1034, 1035 [STD		1. More clearly state that this draft updates RFCs 1034, 1035 [STD
	13].		13].
	2. Add informative references to ISO 8859-1 and ISO 8859-2.		2. Add informative references to ISO 8859-1 and ISO 8859-2.
	3. Fix hyphenation and capitalization nits.		3. Fix hyphenation and capitalization nits.
			INTERNET-DRAFT DNS Case Insensitivity
			-05 to -06 Changes
			The following changes were made between draft version -05 and -06.
			1. Add notation to the RFC Editor that the draft version change
			summaries are to be removed before RFC publication.
			2. Additional text explaining why labe case insensitivity is CLASS
			independent.
			3. Changes and additional text clarifying that the fact that
			inconsistent case in data loaded into DNS may result in
			unpredicatable or inconsistent case in DNS storage but has no effect
			on the completeness of RR sets retrieved.
			4. Add reference to [RFC 3363] and update reference to [RFC 2535] to
			be to [RFC 4034].
			INTERNET-DRAFT DNS Case Insensitivity
	Author's Address		Author's Address
	Donald E. Eastlake 3rd		Donald E. Eastlake 3rd
	Motorola Laboratories		Motorola Laboratories
	155 Beaver Street		155 Beaver Street
	Milford, MA 01757 USA		Milford, MA 01757 USA
	Telephone: +1 508-786-7554 (w)		Telephone: +1 508-786-7554 (w)
	+1 508-634-2066 (h)
	EMail: Donald.Eastlake@motorola.com
	INTERNET-DRAFT DNS Case Insensitivity		EMail: Donald.Eastlake@motorola.com
	Expiration and File Name		Expiration and File Name
	This draft expires July 2005.		This draft expires January 2006.
	Its file name is draft-ietf-dnsext-insensitive-05.txt.		Its file name is draft-ietf-dnsext-insensitive-06.txt.
End of changes.
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