draft-ietf-netmod-module-tags-07.txt		draft-ietf-netmod-module-tags-08.txt
	Network Working Group C. Hopps		Network Working Group C. Hopps
	Internet-Draft LabN Consulting, L.L.C.		Internet-Draft LabN Consulting, L.L.C.
	Updates: 8407 (if approved) L. Berger		Updates: 8407 (if approved) L. Berger
	Intended status: Standards Track LabN Consulting, LLC.		Intended status: Standards Track LabN Consulting, LLC.
	Expires: September 10, 2019 D. Bogdanovic		Expires: November 4, 2019 D. Bogdanovic
	Volta Networks		Volta Networks
	March 9, 2019		May 3, 2019
	YANG Module Tags		YANG Module Tags
	draft-ietf-netmod-module-tags-07		draft-ietf-netmod-module-tags-08
	Abstract		Abstract
	This document provides for the association of tags with YANG modules.		This document provides for the association of tags with YANG modules.
	The expectation is for such tags to be used to help classify and		The expectation is for such tags to be used to help classify and
	organize modules. A method for defining, reading and writing a		organize modules. A method for defining, reading and writing a
	modules tags is provided. Tags may be standardized and assigned		modules tags is provided. Tags may be registered and assigned during
	during module definition; assigned by implementations; or dynamically		module definition; assigned by implementations; or dynamically
	defined and set by users. This document also provides guidance to		defined and set by users. This document also provides guidance to
	future model writers; as such, this document updates RFC8407.		future model writers; as such, this document updates RFC8407.
	Status of This Memo		Status of This Memo
	This Internet-Draft is submitted in full conformance with the		This Internet-Draft is submitted in full conformance with the
	provisions of BCP 78 and BCP 79.		provisions of BCP 78 and BCP 79.
	Internet-Drafts are working documents of the Internet Engineering		Internet-Drafts are working documents of the Internet Engineering
	Task Force (IETF). Note that other groups may also distribute		Task Force (IETF). Note that other groups may also distribute
	working documents as Internet-Drafts. The list of current Internet-		working documents as Internet-Drafts. The list of current Internet-
	Drafts is at https://datatracker.ietf.org/drafts/current/.		Drafts is at https://datatracker.ietf.org/drafts/current/.
	Internet-Drafts are draft documents valid for a maximum of six months		Internet-Drafts are draft documents valid for a maximum of six months
	and may be updated, replaced, or obsoleted by other documents at any		and may be updated, replaced, or obsoleted by other documents at any
	time. It is inappropriate to use Internet-Drafts as reference		time. It is inappropriate to use Internet-Drafts as reference
	material or to cite them other than as "work in progress."		material or to cite them other than as "work in progress."
	This Internet-Draft will expire on September 10, 2019.		This Internet-Draft will expire on November 4, 2019.
	Copyright Notice		Copyright Notice
	Copyright (c) 2019 IETF Trust and the persons identified as the		Copyright (c) 2019 IETF Trust and the persons identified as the
	document authors. All rights reserved.		document authors. All rights reserved.
	This document is subject to BCP 78 and the IETF Trust's Legal		This document is subject to BCP 78 and the IETF Trust's Legal
	Provisions Relating to IETF Documents		Provisions Relating to IETF Documents
	(https://trustee.ietf.org/license-info) in effect on the date of		(https://trustee.ietf.org/license-info) in effect on the date of
	publication of this document. Please review these documents		publication of this document. Please review these documents
	skipping to change at page 2, line 16 ¶		skipping to change at page 2, line 16 ¶
	include Simplified BSD License text as described in Section 4.e of		include Simplified BSD License text as described in Section 4.e of
	the Trust Legal Provisions and are provided without warranty as		the Trust Legal Provisions and are provided without warranty as
	described in the Simplified BSD License.		described in the Simplified BSD License.
	Table of Contents		Table of Contents
	1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2		1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
	1.1. Some possible use cases for YANG module tags . . . . . . 3		1.1. Some possible use cases for YANG module tags . . . . . . 3
	1.2. Conventions Used in This Document . . . . . . . . . . . . 4		1.2. Conventions Used in This Document . . . . . . . . . . . . 4
	2. Tag Values . . . . . . . . . . . . . . . . . . . . . . . . . 4		2. Tag Values . . . . . . . . . . . . . . . . . . . . . . . . . 4
	2.1. IETF Standard Tags . . . . . . . . . . . . . . . . . . . 4		2.1. IETF Tags . . . . . . . . . . . . . . . . . . . . . . . . 4
	2.2. Vendor Tags . . . . . . . . . . . . . . . . . . . . . . . 4		2.2. Vendor Tags . . . . . . . . . . . . . . . . . . . . . . . 4
	2.3. User Tags . . . . . . . . . . . . . . . . . . . . . . . . 5		2.3. User Tags . . . . . . . . . . . . . . . . . . . . . . . . 5
	2.4. Reserved Tags . . . . . . . . . . . . . . . . . . . . . . 5		2.4. Reserved Tags . . . . . . . . . . . . . . . . . . . . . . 5
	3. Tag Management . . . . . . . . . . . . . . . . . . . . . . . 5		3. Tag Management . . . . . . . . . . . . . . . . . . . . . . . 5
	3.1. Module Definition Tagging . . . . . . . . . . . . . . . . 5		3.1. Module Definition Tagging . . . . . . . . . . . . . . . . 5
	3.2. Implementation Tagging . . . . . . . . . . . . . . . . . 5		3.2. Implementation Tagging . . . . . . . . . . . . . . . . . 5
	3.3. User Tagging . . . . . . . . . . . . . . . . . . . . . . 5		3.3. User Tagging . . . . . . . . . . . . . . . . . . . . . . 5
	4. Tags Module Structure . . . . . . . . . . . . . . . . . . . . 6		4. Tags Module Structure . . . . . . . . . . . . . . . . . . . . 6
	4.1. Tags Module Tree . . . . . . . . . . . . . . . . . . . . 6		4.1. Tags Module Tree . . . . . . . . . . . . . . . . . . . . 6
	4.2. YANG Module . . . . . . . . . . . . . . . . . . . . . . . 6		4.2. YANG Module . . . . . . . . . . . . . . . . . . . . . . . 6
	5. Other Classifications . . . . . . . . . . . . . . . . . . . . 9		5. Other Classifications . . . . . . . . . . . . . . . . . . . . 9
	6. Guidelines to Model Writers . . . . . . . . . . . . . . . . . 9		6. Guidelines to Model Writers . . . . . . . . . . . . . . . . . 9
	6.1. Define Standard Tags . . . . . . . . . . . . . . . . . . 9		6.1. Define Standard Tags . . . . . . . . . . . . . . . . . . 9
	7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 9		7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 9
	7.1. YANG Module Tag Prefixes Registry . . . . . . . . . . . . 9		7.1. YANG Module Tag Prefixes Registry . . . . . . . . . . . . 9
	7.2. YANG Module Tags Registry . . . . . . . . . . . . . . . . 10		7.2. IETF YANG Module Tags Registry . . . . . . . . . . . . . 10
	7.3. Updates to the IETF XML Registry . . . . . . . . . . . . 12		7.3. Updates to the IETF XML Registry . . . . . . . . . . . . 12
	7.4. Updates to the YANG Module Names Registry . . . . . . . . 12		7.4. Updates to the YANG Module Names Registry . . . . . . . . 12
	8. Security Considerations . . . . . . . . . . . . . . . . . . . 12		8. Security Considerations . . . . . . . . . . . . . . . . . . . 12
	9. References . . . . . . . . . . . . . . . . . . . . . . . . . 13		9. References . . . . . . . . . . . . . . . . . . . . . . . . . 13
	9.1. Normative References . . . . . . . . . . . . . . . . . . 13		9.1. Normative References . . . . . . . . . . . . . . . . . . 13
	9.2. Informative References . . . . . . . . . . . . . . . . . 13		9.2. Informative References . . . . . . . . . . . . . . . . . 13
	Appendix A. Examples . . . . . . . . . . . . . . . . . . . . . . 14		Appendix A. Examples . . . . . . . . . . . . . . . . . . . . . . 14
	Appendix B. Acknowledgements . . . . . . . . . . . . . . . . . . 15		Appendix B. Acknowledgements . . . . . . . . . . . . . . . . . . 15
	Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 15		Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 15
	1. Introduction		1. Introduction
	The use of tags for classification and organization is fairly		The use of tags for classification and organization is fairly
	ubiquitous not only within IETF protocols, but in the internet itself		ubiquitous not only within IETF protocols, but in the internet itself
	(e.g., "#hashtags"). One benefit of using tags for organization over		(e.g., "#hashtags"). One benefit of using tags for organization over
	a rigid structure is that it is more flexible and can more easily		a rigid structure is that it is more flexible and can more easily
	adapt over time as technologies evolve. Tags can be usefully		adapt over time as technologies evolve. Tags can be usefully
	standardized, but they can also serve as a non-standardized mechanism		registered, but they can also serve as a non-registered mechanism
	available for users to define themselves. This document provides a		available for users to define themselves. This document provides a
	mechanism to define tags and associate them with YANG modules in a		mechanism to define tags and associate them with YANG modules in a
	flexible manner. In particular, tags may be standardized as well as		flexible manner. In particular, tags may be registered as well as
	assigned during module definition; assigned by implementations; or		assigned during module definition; assigned by implementations; or
	dynamically defined and set by users.		dynamically defined and set by users.
	This document defines a YANG module [RFC7950] which provides a list		This document defines a YANG module [RFC7950] which provides a list
	of module entries to allow for adding or removing of tags as well as		of module entries to allow for adding or removing of tags as well as
	viewing the set of tags associated with a module.		viewing the set of tags associated with a module.
	This document defines an extension statement to be used to indicate		This document defines an extension statement to be used to indicate
	tags that SHOULD be added by the module implementation automatically		tags that SHOULD be added by the module implementation automatically
	(i.e., outside of configuration).		(i.e., outside of configuration).
	skipping to change at page 4, line 22 ¶		skipping to change at page 4, line 22 ¶
	The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",		The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
	"SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and		"SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
	"OPTIONAL" in this document are to be interpreted as described in		"OPTIONAL" in this document are to be interpreted as described in
	[RFC2119] [RFC8174] when, and only when, they appear in all capitals,		[RFC2119] [RFC8174] when, and only when, they appear in all capitals,
	as shown here.		as shown here.
	2. Tag Values		2. Tag Values
	All tags SHOULD begin with a prefix indicating who owns their		All tags SHOULD begin with a prefix indicating who owns their
	definition. An IANA registry (Section 7.1) is used to support		definition. An IANA registry (Section 7.1) is used to support
	standardizing tag prefixes. Currently 3 prefixes are defined. No		registering tag prefixes. Currently 3 prefixes are defined. No
	further structure is imposed by this document on the value following		further structure is imposed by this document on the value following
	the standard prefix, and the value can contain any YANG type 'string'		the registered prefix, and the value can contain any YANG type
	characters except carriage-returns, newlines and tabs.		'string' characters except carriage-returns, newlines and tabs.
	Again, except for the conflict-avoiding prefix, this document is not		Again, except for the conflict-avoiding prefix, this document is not
	specifying any structure on (i.e., restricting) the tag values on		specifying any structure on (i.e., restricting) the tag values on
	purpose. The intent is to avoid arbitrarily restricting the values		purpose. The intent is to avoid arbitrarily restricting the values
	that designers, implementers and users can use. As a result of this		that designers, implementers and users can use. As a result of this
	choice, designers, implementers, and users are free to add or not add		choice, designers, implementers, and users are free to add or not add
	any structure they may require to their own tag values.		any structure they may require to their own tag values.
	2.1. IETF Standard Tags		2.1. IETF Tags
	An IETF standard tag is a tag that has the prefix "ietf:". All IETF		An IETF tag is a tag that has the prefix "ietf:". All IETF tags are
	standard tags are registered with IANA in a registry defined later in		registered with IANA in a registry defined later in this document
	this document (Section 7.2).		(Section 7.2).
	2.2. Vendor Tags		2.2. Vendor Tags
	A vendor tag is a tag that has the prefix "vendor:". These tags are		A vendor tag is a tag that has the prefix "vendor:". These tags are
	defined by the vendor that implements the module, and are not		defined by the vendor that implements the module, and are not
	standardized; however, it is RECOMMENDED that the vendor include		registered; however, it is RECOMMENDED that the vendor include extra
	extra identification in the tag to avoid collisions such as using the		identification in the tag to avoid collisions such as using the
	enterpise or organization name following the "vendor:" prefix (e.g.,		enterpise or organization name following the "vendor:" prefix (e.g.,
	vendor:example.com:vendor-defined-classifier).		vendor:example.com:vendor-defined-classifier).
	2.3. User Tags		2.3. User Tags
	A user tag is any tag that has the prefix "user:". These tags are		A user tag is any tag that has the prefix "user:". These tags are
	defined by the user/administrator and will never be standardized.		defined by the user/administrator and are not meant to be registered.
	Users are not required to use the "user:" prefix; however, doing so		Users are not required to use the "user:" prefix; however, doing so
	is RECOMMENDED as it helps avoid collisions.		is RECOMMENDED as it helps avoid collisions.
	2.4. Reserved Tags		2.4. Reserved Tags
	Any tag not starting with the prefix "ietf:", "vendor:" or "user:" is		Any tag not starting with the prefix "ietf:", "vendor:" or "user:" is
	reserved for future standardization. These tag values are not		reserved for future use. These tag values are not invalid, but
	invalid, but simply reserved in the context of standardization.		simply reserved in the context of specifications (e.g., RFCs).
	3. Tag Management		3. Tag Management
	Tags can become associated with a module in a number of ways. Tags		Tags can become associated with a module in a number of ways. Tags
	may be defined and associated at module design time, at		may be defined and associated at module design time, at
	implementation time, or via user administrative control. As the main		implementation time, or via user administrative control. As the main
	consumer of tags are users, users may also remove any tag, no matter		consumer of tags are users, users may also remove any tag, no matter
	how the tag became associated with a module.		how the tag became associated with a module.
	3.1. Module Definition Tagging		3.1. Module Definition Tagging
	A module definition MAY indicate a set of tags to be added by the		A module definition MAY indicate a set of tags to be added by the
	module implementer. These design time tags are indicated using the		module implementer. These design time tags are indicated using the
	module-tag extension statement.		module-tag extension statement.
	If the module is defined in an IETF standards track document, the		If the module is defined in an IETF standards track document, the
	tags MUST be IETF Standard Tags (2.1). Thus, new modules can drive		tags MUST be IETF Tags (2.1). Thus, new modules can drive the
	the addition of new standard tags to the IANA registry defined in		addition of new IETF tags to the IANA registry defined in
	Section 7.2, and the IANA registry can serve as a check against		Section 7.2, and the IANA registry can serve as a check against
	duplication.		duplication.
	3.2. Implementation Tagging		3.2. Implementation Tagging
	An implementation MAY include additional tags associated with a		An implementation MAY include additional tags associated with a
	module. These tags SHOULD be IETF Standard or vendor specific tags.		module. These tags SHOULD be IETF Tags (i.e., registered) or vendor
			specific tags.
	3.3. User Tagging		3.3. User Tagging
	Tags of any kind, with or without a prefix, can be assigned and		Tags of any kind, with or without a prefix, can be assigned and
	removed by the user using normal configuration mechanisms. In order		removed by the user using normal configuration mechanisms. In order
	to remove a tag from the operational datastore the user adds a		to remove a tag from the operational datastore the user adds a
	matching "masked-tag" entry for a given module.		matching "masked-tag" entry for a given module.
	4. Tags Module Structure		4. Tags Module Structure
	skipping to change at page 6, line 21 ¶		skipping to change at page 6, line 21 ¶
	module: ietf-module-tags		module: ietf-module-tags
	+--rw module-tags		+--rw module-tags
	+--rw module* [name]		+--rw module* [name]
	+--rw name yang:yang-identifier		+--rw name yang:yang-identifier
	+--rw tag* tag		+--rw tag* tag
	+--rw masked-tag* tag		+--rw masked-tag* tag
	4.2. YANG Module		4.2. YANG Module
	<CODE BEGINS> file "ietf-module-tags@2019-03-09.yang"		<CODE BEGINS> file "ietf-module-tags@2019-05-03.yang"
	module ietf-module-tags {		module ietf-module-tags {
	yang-version 1.1;		yang-version 1.1;
	namespace "urn:ietf:params:xml:ns:yang:ietf-module-tags";		namespace "urn:ietf:params:xml:ns:yang:ietf-module-tags";
	prefix tags;		prefix tags;
	import ietf-yang-types {		import ietf-yang-types {
	prefix yang;		prefix yang;
	}		}
	organization		organization
	skipping to change at page 7, line 28 ¶		skipping to change at page 7, line 28 ¶
	described in BCP 14 [RFC2119] [RFC8174] when, and only when,		described in BCP 14 [RFC2119] [RFC8174] when, and only when,
	they appear in all capitals, as shown here.		they appear in all capitals, as shown here.
	This version of this YANG module is part of RFC XXXX		This version of this YANG module is part of RFC XXXX
	(https://tools.ietf.org/html/rfcXXXX); see the RFC itself for		(https://tools.ietf.org/html/rfcXXXX); see the RFC itself for
	full legal notices.";		full legal notices.";
	// RFC Ed.: update the date below with the date of RFC publication		// RFC Ed.: update the date below with the date of RFC publication
	// and RFC number and remove this note.		// and RFC number and remove this note.
	revision 2019-03-09 {		revision 2019-05-03 {
	description		description
	"Initial revision.";		"Initial revision.";
	reference "RFC XXXX: YANG Module Tags";		reference "RFC XXXX: YANG Module Tags";
	}		}
	typedef tag {		typedef tag {
	type string {		type string {
	length "1..max";		length "1..max";
	pattern '[\S ]+';		pattern '[\S ]+';
	}		}
	description		description
	"A tag is a type 'string' value that does not include carriage		"A tag is a type 'string' value that does not include carriage
	return, newline or tab characters. It SHOULD begin with a		return, newline or tab characters. It SHOULD begin with a
	standard prefix; however, tags without a standard prefix		registered prefix; however, tags without a registered prefix
	SHOULD NOT be treated as invalid.";		SHOULD NOT be treated as invalid.";
	}		}
	extension module-tag {		extension module-tag {
	argument tag;		argument tag;
	description		description
	"The argument 'tag' is of type 'tag'. This extension statement		"The argument 'tag' is of type 'tag'. This extension statement
	is used by module authors to indicate the tags that SHOULD be		is used by module authors to indicate the tags that SHOULD be
	added automatically by the system. As such the origin of the		added automatically by the system. As such the origin of the
	value for the pre-defined tags should be set to 'system'		value for the pre-defined tags should be set to 'system'
	skipping to change at page 8, line 26 ¶		skipping to change at page 8, line 26 ¶
	type yang:yang-identifier;		type yang:yang-identifier;
	mandatory true;		mandatory true;
	description		description
	"The YANG module name.";		"The YANG module name.";
	}		}
	leaf-list tag {		leaf-list tag {
	type tag;		type tag;
	description		description
	"Tags associated with the module. See the IANA 'YANG Module		"Tags associated with the module. See the IANA 'YANG Module
	Tag Prefixes' registry for reserved prefixes and the IANA		Tag Prefixes' registry for reserved prefixes and the IANA
	'YANG Module Tags' registry for IETF standard tags.		'IETF YANG Module Tags' registry for IETF tags.
	The 'operational' state [RFC8342] view of this list is		The 'operational' state [RFC8342] view of this list is
	constructed using the following steps:		constructed using the following steps:
	1) System tags (i.e., tags of 'system' origin) are added.		1) System tags (i.e., tags of 'system' origin) are added.
	2) User configured tags (i.e., tags of 'intended' origin)		2) User configured tags (i.e., tags of 'intended' origin)
	are added.		are added.
	3) Any tag that is equal to a masked-tag is removed.";		3) Any tag that is equal to a masked-tag is removed.";
	}		}
	leaf-list masked-tag {		leaf-list masked-tag {
	skipping to change at page 9, line 5 ¶		skipping to change at page 8, line 51 ¶
	operational state datastore [RFC8342] by adding them to		operational state datastore [RFC8342] by adding them to
	this list. It is not an error to add tags to this list		this list. It is not an error to add tags to this list
	that are not associated with the module, but they have no		that are not associated with the module, but they have no
	operational effect.";		operational effect.";
	}		}
	}		}
	}		}
	}		}
	<CODE ENDS>		<CODE ENDS>
			Figure 1: Module Tags Module
	5. Other Classifications		5. Other Classifications
	It is worth noting that a different YANG module classification		It is worth noting that a different YANG module classification
	document exists [RFC8199]. That document only classifies modules in		document exists [RFC8199]. That document only classifies modules in
	a logical manner and does not define tagging or any other mechanisms.		a logical manner and does not define tagging or any other mechanisms.
	It divides YANG modules into two categories (service or element) and		It divides YANG modules into two categories (service or element) and
	then into one of three origins: standard, vendor or user. It does		then into one of three origins: standard, vendor or user. It does
	provide a good way to discuss and identify modules in general. This		provide a good way to discuss and identify modules in general. This
	document defines standard tags to support [RFC8199] style		document defines IETF tags to support [RFC8199] style classification.
	classification.
	6. Guidelines to Model Writers		6. Guidelines to Model Writers
	This section updates [RFC8407].		This section updates [RFC8407].
	6.1. Define Standard Tags		6.1. Define Standard Tags
	A module MAY indicate, using module-tag extension statements, a set		A module MAY indicate, using module-tag extension statements, a set
	of tags that are to be automatically associated with it (i.e., not		of tags that are to be automatically associated with it (i.e., not
	added through configuration).		added through configuration).
	skipping to change at page 9, line 36 ¶		skipping to change at page 9, line 35 ¶
	module example-module {		module example-module {
	//...		//...
	import module-tags { prefix tags; }		import module-tags { prefix tags; }
	tags:module-tag "ietf:some-new-tag";		tags:module-tag "ietf:some-new-tag";
	tags:module-tag "ietf:some-other-tag";		tags:module-tag "ietf:some-other-tag";
	// ...		// ...
	}		}
	The module writer can use existing standard tags, or use new tags		The module writer can use existing standard tags, or use new tags
	defined in the model definition, as appropriate. For standardized		defined in the model definition, as appropriate. For IETF
	modules new tags MUST be assigned in the IANA registry defined below,		standardized modules new tags MUST be assigned in the IANA registry
	see Section 7.2.		defined below, see Section 7.2.
	7. IANA Considerations		7. IANA Considerations
	7.1. YANG Module Tag Prefixes Registry		7.1. YANG Module Tag Prefixes Registry
	IANA is asked to create a new registry "YANG Module Tag Prefixes"		IANA is asked to create a new registry "YANG Module Tag Prefixes"
	grouped under a new "Protocol" category named "YANG Module Tags".		grouped under a new "Protocol" category named "YANG Module Tags".
	This registry allocates tag prefixes. All YANG module tags SHOULD		This registry allocates tag prefixes. All YANG module tags SHOULD
	begin with one of the prefixes in this registry.		begin with one of the prefixes in this registry.
	Prefix entries in this registry should be short strings consisting of		Prefix entries in this registry should be short strings consisting of
	lowercase ASCII alpha-numeric characters and a final ":" character.		lowercase ASCII alpha-numeric characters and a final ":" character.
	The allocation policy for this registry is Specification Required		The allocation policy for this registry is Specification Required
	[RFC8126].		[RFC8126]. The Reference and Assignee values should be sufficient to
			identify and contact the organization that has been allocated the
			prefix.
	The initial values for this registry are as follows.		The initial values for this registry are as follows.
	+---------+---------------------------------------------------------+		+---------+----------------------------------+-----------+----------+
	| Prefix | Description |		| Prefix | Description | Reference | Assignee |
	+---------+---------------------------------------------------------+		+---------+----------------------------------+-----------+----------+
	| ietf: | IETF Standard Tag allocated in the IANA YANG Module |		| ietf: | IETF Tags allocated in the IANA | [This | IETF |
	| | Tags registry. |		| | IETF YANG Module Tags registry. | document] | |
	| | |		| | | | |
	| vendor: | Non-standardized tags allocated by the module |		| vendor: | Non-registered tags allocated by | [This | IETF |
	| | implementer. |		| | the module implementer. | document] | |
	| | |		| | | | |
	| user: | Non-standardized tags allocated by and for the user. |		| user: | Non-registered tags allocated by | [This | IETF |
	+---------+---------------------------------------------------------+		| | and for the user. | document] | |
			+---------+----------------------------------+-----------+----------+
	Other standards organizations (SDOs) wishing to standardize their own		Other standards organizations (SDOs) wishing to allocate their own
	set of tags should allocate a prefix from this registry.		set of tags should allocate a prefix from this registry.
	7.2. YANG Module Tags Registry		7.2. IETF YANG Module Tags Registry
	IANA is asked to create a new registry "YANG Module Tags" grouped		IANA is asked to create a new registry "IETF YANG Module Tags"
	under a new "Protocol" category "YANG Module Tags". This registry		grouped under a new "Protocol" category "IETF YANG Module Tags".
	should be included below "YANG Module Tag Prefixes" when listed on		This registry should be included below "YANG Module Tag Prefixes"
	the same page.		when listed on the same page.
	This registry allocates prefixes that have the standard prefix		This registry allocates tags that have the registered prefix "ietf:".
	"ietf:". New values should be well considered and not achievable		New values should be well considered and not achievable through a
	through a combination of already existing standard tags.		combination of already existing IETF tags.
	The allocation policy for this registry is IETF Review [RFC8126].		The allocation policy for this registry is IETF Review [RFC8126].
	The initial values for this registry are as follows.		The initial values for this registry are as follows.
	+----------------------------+--------------------------+-----------+		+----------------------------+--------------------------+-----------+
	| Tag | Description | Reference |		| Tag | Description | Reference |
	+----------------------------+--------------------------+-----------+		+----------------------------+--------------------------+-----------+
	| ietf:network-element-class | [RFC8199] network | [RFC8199] |		| ietf:network-element-class | [RFC8199] network | [RFC8199] |
	| | element. | |		| | element. | |
	skipping to change at page 14, line 25 ¶		skipping to change at page 14, line 25 ¶
	[RFC6242] Wasserman, M., "Using the NETCONF Protocol over Secure		[RFC6242] Wasserman, M., "Using the NETCONF Protocol over Secure
	Shell (SSH)", RFC 6242, DOI 10.17487/RFC6242, June 2011,		Shell (SSH)", RFC 6242, DOI 10.17487/RFC6242, June 2011,
	<https://www.rfc-editor.org/info/rfc6242>.		<https://www.rfc-editor.org/info/rfc6242>.
	[RFC8340] Bjorklund, M. and L. Berger, Ed., "YANG Tree Diagrams",		[RFC8340] Bjorklund, M. and L. Berger, Ed., "YANG Tree Diagrams",
	BCP 215, RFC 8340, DOI 10.17487/RFC8340, March 2018,		BCP 215, RFC 8340, DOI 10.17487/RFC8340, March 2018,
	<https://www.rfc-editor.org/info/rfc8340>.		<https://www.rfc-editor.org/info/rfc8340>.
	Appendix A. Examples		Appendix A. Examples
	The following is a fictional example result from a query of the		The following is a fictional NETCONF example result from a query of
	module tags list. For the sake of brevity only a few module results		the module tags list. For the sake of brevity only a few module
	are imagined.		results are imagined.
	<ns0:config xmlns:ns0="urn:ietf:params:xml:ns:netconf:base:1.0">		<ns0:data xmlns:ns0="urn:ietf:params:xml:ns:netconf:base:1.0">
	<t:module-tags xmlns:t="urn:ietf:params:xml:ns:yang:ietf-module-tags">		<t:module-tags xmlns:t="urn:ietf:params:xml:ns:yang:ietf-module-tags">
	<t:module>		<t:module>
	<t:name>ietf-bfd</t:name>		<t:name>ietf-bfd</t:name>
	<t:tag>ietf:network-element-class</t:tag>		<t:tag>ietf:network-element-class</t:tag>
	<t:tag>ietf:oam</t:tag>		<t:tag>ietf:oam</t:tag>
	<t:tag>ietf:protocol</t:tag>		<t:tag>ietf:protocol</t:tag>
	<t:tag>ietf:sdo-defined-class</t:tag>		<t:tag>ietf:sdo-defined-class</t:tag>
	</t:module>		</t:module>
	<t:module>		<t:module>
	<t:name>ietf-isis</t:name>		<t:name>ietf-isis</t:name>
	skipping to change at page 15, line 29 ¶		skipping to change at page 15, line 29 ¶
	<t:tag>ietf:routing</t:tag>		<t:tag>ietf:routing</t:tag>
	</t:module>		</t:module>
	<t:module>		<t:module>
	<t:name>ietf-ssh-server</t:name>		<t:name>ietf-ssh-server</t:name>
	<t:tag>ietf:network-element-class</t:tag>		<t:tag>ietf:network-element-class</t:tag>
	<t:tag>ietf:protocol</t:tag>		<t:tag>ietf:protocol</t:tag>
	<t:tag>ietf:sdo-defined-class</t:tag>		<t:tag>ietf:sdo-defined-class</t:tag>
	<t:tag>ietf:system-management</t:tag>		<t:tag>ietf:system-management</t:tag>
	</t:module>		</t:module>
	</t:module-tags>		</t:module-tags>
	</ns0:config>		</ns0:data>
	Appendix B. Acknowledgements		Appendix B. Acknowledgements
	Special thanks to Robert Wilton for his help improving the		Special thanks to Robert Wilton for his help improving the
	introduction and providing the example use cases.		introduction and providing the example use cases.
	Authors' Addresses		Authors' Addresses
	Christian Hopps		Christian Hopps
	LabN Consulting, L.L.C.		LabN Consulting, L.L.C.
End of changes. 34 change blocks.
	60 lines changed or deleted		65 lines changed or added
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