draft-ietf-netmod-module-tags-04.txt		draft-ietf-netmod-module-tags-05.txt
	Network Working Group C. Hopps		Network Working Group C. Hopps
	Internet-Draft L. Berger		Internet-Draft L. Berger
	Updates: RFC8407 (if approved) LabN Consulting, L.L.C.		Updates: RFC8407 (if approved) LabN Consulting, L.L.C.
	Intended status: Standards Track D. Bogdanovic		Intended status: Standards Track D. Bogdanovic
	Expires: August 2, 2019 Volta Networks		Expires: August 19, 2019 Volta Networks
	January 29, 2019		February 15, 2019
	YANG Module Tags		YANG Module Tags
	draft-ietf-netmod-module-tags-04		draft-ietf-netmod-module-tags-05
	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 standardized and assigned
	during module definition; assigned by implementations; or dynamically		during module definition; assigned by implementations; or dynamically
	defined and set by users. This document provides guidance to future		defined and set by users. This document provides guidance to future
	model writers and, as such, this document updates [RFC8407].		model writers and, as such, this document updates [RFC8407].
	skipping to change at page 1, line 38 ¶		skipping to change at page 1, line 38 ¶
	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 August 2, 2019.		This Internet-Draft will expire on August 19, 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
	carefully, as they describe your rights and restrictions with respect		carefully, as they describe your rights and restrictions with respect
	to this document. Code Components extracted from this document must		to this document. Code Components extracted from this document must
	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 of YANG module tags . . . . . . . 3		1.1. Some possible use cases of YANG module tags . . . . . . . 3
	2. Conventions Used in This Document . . . . . . . . . . . . . . 3		2. Conventions Used in This Document . . . . . . . . . . . . . . 4
	3. Tag Values . . . . . . . . . . . . . . . . . . . . . . . . . 4		3. Tag Values . . . . . . . . . . . . . . . . . . . . . . . . . 4
	3.1. IETF Standard Tags . . . . . . . . . . . . . . . . . . . 4		3.1. IETF Standard Tags . . . . . . . . . . . . . . . . . . . 4
	3.2. Vendor Tags . . . . . . . . . . . . . . . . . . . . . . . 4		3.2. Vendor Tags . . . . . . . . . . . . . . . . . . . . . . . 4
	3.3. User Tags . . . . . . . . . . . . . . . . . . . . . . . . 4		3.3. User Tags . . . . . . . . . . . . . . . . . . . . . . . . 4
	3.4. Reserved Tags . . . . . . . . . . . . . . . . . . . . . . 4		3.4. Reserved Tags . . . . . . . . . . . . . . . . . . . . . . 4
	4. Tag Management . . . . . . . . . . . . . . . . . . . . . . . 4		4. Tag Management . . . . . . . . . . . . . . . . . . . . . . . 4
	4.1. Module Definition Association . . . . . . . . . . . . . . 5		4.1. Module Definition Association . . . . . . . . . . . . . . 5
	4.2. Implementation Association . . . . . . . . . . . . . . . 5		4.2. Implementation Association . . . . . . . . . . . . . . . 5
	4.3. Administrative Tagging . . . . . . . . . . . . . . . . . 5		4.3. Administrative Tagging . . . . . . . . . . . . . . . . . 5
	5. Tags Module Structure . . . . . . . . . . . . . . . . . . . . 5		5. Tags Module Structure . . . . . . . . . . . . . . . . . . . . 5
	5.1. Tags Module Tree . . . . . . . . . . . . . . . . . . . . 5		5.1. Tags Module Tree . . . . . . . . . . . . . . . . . . . . 5
	5.2. Tags Module . . . . . . . . . . . . . . . . . . . . . . . 5		5.2. Tags Module . . . . . . . . . . . . . . . . . . . . . . . 5
	6. Other Classifications . . . . . . . . . . . . . . . . . . . . 8		6. Other Classifications . . . . . . . . . . . . . . . . . . . . 8
	7. Guidelines to Model Writers . . . . . . . . . . . . . . . . . 8		7. Guidelines to Model Writers . . . . . . . . . . . . . . . . . 8
	7.1. Define Standard Tags . . . . . . . . . . . . . . . . . . 8		7.1. Define Standard Tags . . . . . . . . . . . . . . . . . . 8
	8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 8		8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 9
	8.1. YANG Module Tag Prefix Registry . . . . . . . . . . . . . 8		8.1. YANG Module Tag Prefix Registry . . . . . . . . . . . . . 9
	8.2. YANG Module IETF Tag Registry . . . . . . . . . . . . . . 9		8.2. YANG Module IETF Tag Registry . . . . . . . . . . . . . . 9
	9. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 10		9. References . . . . . . . . . . . . . . . . . . . . . . . . . 11
	10. References . . . . . . . . . . . . . . . . . . . . . . . . . 10		9.1. Normative References . . . . . . . . . . . . . . . . . . 11
	10.1. Normative References . . . . . . . . . . . . . . . . . . 10		9.2. Informative References . . . . . . . . . . . . . . . . . 11
	10.2. Informative References . . . . . . . . . . . . . . . . . 11		Appendix A. Acknowledgements . . . . . . . . . . . . . . . . . . 11
	Appendix A. Example . . . . . . . . . . . . . . . . . . . . . . 11		Appendix B. Example . . . . . . . . . . . . . . . . . . . . . . 12
	Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 12		Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 12
	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 a		(e.g., #hashtags). One benefit of using tags for organization over a
	rigid structure is that it is more flexible and can more easily adapt		rigid structure is that it is more flexible and can more easily adapt
	over time as technologies evolve. Tags can be usefully standardized,		over time as technologies evolve. Tags can be usefully standardized,
	but they can also serve as a non-standardized mechanism available for		but they can also serve as a non-standardized mechanism available for
	users to define themselves. This document provides a mechanism to		users to define themselves. This document provides a mechanism to
	define tags and associate them with YANG modules in a flexible		define tags and associate them with YANG modules in a flexible
	manner. In particular, tags may be standardized as well as assigned		manner. In particular, tags may be standardized as well as assigned
	during module definition; assigned by implementations; or dynamically		during module definition; assigned by implementations; or dynamically
	defined and set by users.		defined and set by users.
	This document defines a YANG module [RFC6020] 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).
	This document also defines an IANA registry for tag prefixes as well		This document also defines an IANA registry for tag prefixes as well
	as a set of globally assigned tags.		as a set of globally assigned tags.
	Section 7 provides guidelines for authors of YANG data models. This		Section 7 provides guidelines for authors of YANG data models. This
	section updates [RFC8407].		document updates [RFC8407].
			The YANG data model in this document conforms to the Network
			Management Datastore Architecture defined in [RFC8342].
	1.1. Some possible use cases of YANG module tags		1.1. Some possible use cases of YANG module tags
	During this documents progression there were requests for example		During this documents progression there were requests for example
	uses of module tags. The following are a few example use cases for		uses of module tags. The following are a few example use cases for
	tags. This list is certainly not exhaustive.		tags. This list is certainly not exhaustive.
	One example use of tags would be to help filter different discrete		One example use of tags would be to help filter different discrete
	categories of YANG modules supported by a device. E.g., if modules		categories of YANG modules supported by a device. E.g., if modules
	are suitably tagged, then an XPath query can be used to list all of		are suitably tagged, then an XPath query can be used to list all of
	skipping to change at page 4, line 4 ¶		skipping to change at page 4, line 10 ¶
	Future management protocol extensions could allow for filtering		Future management protocol extensions could allow for filtering
	queries of configuration or operational state on a server based on		queries of configuration or operational state on a server based on
	tags. E.g., return all operational state related to system-		tags. E.g., return all operational state related to system-
	management.		management.
	2. Conventions Used in This Document		2. Conventions Used in This Document
	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.
	3. Tag Values		3. Tag Values
	All tags begin with a prefix indicating who owns their definition.		All tags SHOULD begin with a prefix indicating who owns their
	An IANA registry is used to support standardizing tag prefixes.		definition. An IANA registry is used to support standardizing tag
	Currently 3 prefixes are defined with all others reserved. No		prefixes. Currently 3 prefixes are defined with all others reserved.
	further structure is imposed by this document on the value following		No further structure is imposed by this document on the value
	the standard prefix, and the value can contain any yang type 'string'		following the standard prefix, and the value can contain any yang
	characters except carriage-returns, newlines and tabs.		type 'string' characters except carriage-returns, newlines and tabs.
	3.1. IETF Standard Tags		3.1. IETF Standard Tags
	An IETF standard tag is a tag that has the prefix "ietf:". All IETF		An IETF standard tag is a tag that has the prefix "ietf:". All IETF
	standard tags are registered with IANA in a registry defined later in		standard tags are registered with IANA in a registry defined later in
	this document.		this document.
	3.2. Vendor Tags		3.2. 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
	skipping to change at page 5, line 9 ¶		skipping to change at page 5, line 11 ¶
	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.
	4.1. Module Definition Association		4.1. Module Definition Association
	A module definition can indicate a set of tags to be added by the		A module definition can 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. If the module definition will be		module-tag extension statement. If the module definition is IETF
	IETF standards track, the tags MUST also be IETF standard tags		standards track, the tags MUST also be IETF standard tags
	(Section 3.1). Thus, new modules can drive the addition of new		(Section 3.1). Thus, new modules can drive the addition of new
	standard tags to the IANA registry, and the IANA registry can serve		standard tags to the IANA registry, and the IANA registry can serve
	as a check against duplication.		as a check against duplication.
	4.2. Implementation Association		4.2. Implementation Association
	An implementation MAY include additional tags associated with a		An implementation MAY include additional tags associated with a
	module. These tags may be standard or vendor specific tags.		module. These tags may be standard or vendor specific tags.
	4.3. Administrative Tagging		4.3. Administrative Tagging
	Tags of any kind can be assigned and removed with using normal		Tags of any kind can be assigned and removed using normal
	configuration mechanisms.		configuration mechanisms.
	5. Tags Module Structure		5. Tags Module Structure
	5.1. Tags Module Tree		5.1. Tags Module Tree
	The tree associated with the "ietf-module-tags" module follows. The		The tree associated with the "ietf-module-tags" module follows. The
	meaning of the symbols can be found in [RFC8340].		meaning of the symbols can be found in [RFC8340].
	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
	5.2. Tags Module		5.2. Tags Module
	<CODE BEGINS> file "ietf-module-tags@2018-10-17.yang"		<CODE BEGINS> file "ietf-module-tags@2019-02-15.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
			"IETF NetMod Working Group (NetMod)";
			contact
			"NetMod Working Group - <netmod@ietf.org>";
	organization		// RFC Ed.: replace XXXX with actual RFC number and
	"IETF NetMod Working Group (NetMod)";		// remove this note.
	contact		description
	"NetMod Working Group - <netmod@ietf.org>";		"This module describes a mechanism associating tags with YANG
			modules. Tags may be IANA assigned or privately defined.
	// RFC Ed.: replace XXXX with actual RFC number and		Copyright (c) 2018 IETF Trust and the persons identified as
	// remove this note.		authors of the code. All rights reserved.
	description		Redistribution and use in source and binary forms, with or
	"This module describes a mechanism associating tags with YANG		without modification, is permitted pursuant to, and subject to
	modules. Tags may be IANA assigned or privately defined.		the license terms contained in, the Simplified BSD License set
			forth in Section 4.c of the IETF Trust's Legal Provisions
			Relating to IETF Documents
			(https://trustee.ietf.org/license-info).
	Copyright (c) 2018 IETF Trust and the persons identified as		The key words 'MUST', 'MUST NOT', 'REQUIRED', 'SHALL', 'SHALL
	authors of the code. All rights reserved.		NOT', 'SHOULD', 'SHOULD NOT', 'RECOMMENDED', 'NOT RECOMMENDED',
			'MAY', and 'OPTIONAL' in this document are to be interpreted as
			described in BCP 14 [RFC2119] [RFC8174] when, and only when,
			they appear in all capitals, as shown here.
	Redistribution and use in source and binary forms, with or		This version of this YANG module is part of RFC XXXX
	without modification, is permitted pursuant to, and subject to		(https://tools.ietf.org/html/rfcXXXX); see the RFC itself for
	the license terms contained in, the Simplified BSD License set		full legal notices.";
	forth in Section 4.c of the IETF Trust's Legal Provisions
	Relating to IETF Documents
	(https://trustee.ietf.org/license-info).
	The key words 'MUST', 'MUST NOT', 'REQUIRED', 'SHALL', 'SHALL		// RFC Ed.: update the date below with the date of RFC publication
	NOT', 'SHOULD', 'SHOULD NOT', 'RECOMMENDED', 'MAY', and		// and RFC number and remove this note.
	'OPTIONAL' in the module text are to be interpreted as described
	in RFC 2119 (https://tools.ietf.org/html/rfc2119).
	This version of this YANG module is part of RFC XXXX		revision 2018-10-17 {
	(https://tools.ietf.org/html/rfcXXXX); see the RFC itself for		description
	full legal notices.";		"Initial revision.";
			reference "RFC XXXX: YANG Module Tags";
			}
	// RFC Ed.: update the date below with the date of RFC publication		typedef tag {
	// and RFC number and remove this note.		type string {
			length "1..max";
			pattern '[a-zA-Z_][a-zA-Z0-9\-_]*:[\S ]+';
			}
			description
			"A tag value is composed of a standard prefix followed by any
			type 'string' value that does not include carriage return,
			newline or tab characters.";
			}
	revision 2018-10-17 {		extension module-tag {
	description		argument tag;
	"Initial revision.";		description
	reference "RFC XXXX: YANG Module Tags";		"The argument 'tag' is of type 'tag'. This extension statement
	}		is used by module authors to indicate the tags that SHOULD be
			added automatically by the system. As such the origin of the
			value for the pre-defined tags should be set to 'system'.";
			}
	typedef tag {		container module-tags {
	type string {		description
	length "1..max";		"Contains the list of modules and their associated tags";
	pattern '[a-zA-Z_][a-zA-Z0-9\-_]*:[\S ]+';		list module {
	}		key "name";
	description		description
	"A tag value is composed of a standard prefix followed by any type		"A list of modules and their associated tags";
	'string' value that does not include carriage return, newline or		leaf name {
	tab characters.";		type yang:yang-identifier;
	}		mandatory true;
	extension module-tag {		description
	argument tag;		"The YANG module name.";
	description		}
	"The argument 'tag' is of type 'tag'. This extension statement is		leaf-list tag {
	used by module authors to indicate the tags that SHOULD be added		type tag;
	automatically by the system. As such the origin of the value		description
	for the pre-defined tags should be set to 'system'.";		"Tags associated with the module. See the IANA 'YANG Module
	}		Tag Prefix' registry for reserved prefixes and the IANA
			'YANG Module IETF Tag' registry for IETF standard tags.
	container module-tags {		The 'operational' state [RFC8342] view of this list is
	description		constructed using the following steps:
	"Contains the list of modules and their associated tags";
	list module {
	key "name";
	description
	"A list of modules and their associated tags";
	leaf name {
	type yang:yang-identifier;
	mandatory true;
	description
	"The YANG module name.";
	}
	leaf-list tag {
	type tag;
	description
	"Tags associated with the module. See the IANA 'YANG Module
	Tag Prefix' registry for reserved prefixes and the IANA 'YANG
	Module IETF Tag' registry for IETF standard tags.
	The operational view of this list is constructed using the following steps:		1) System tags (i.e., tags of 'system' origin) are added.
			2) User configured tags (i.e., tags of 'intended' origin)
			are added.
			3) Any tag that is equal to a masked-tag is removed.";
			}
			leaf-list masked-tag {
			type tag;
			description
			"The list of tags that should not be associated with this
			module. The user can remove (mask) tags from the
			operational state datastore [RFC8342] by adding them to
			this list. It is not an error to add tags to this list
			that are not associated with the module, but they have no
			operational effect.";
			}
			}
			}
			}
			<CODE ENDS>
	1) System added tags are added.
	2) User configured tags are added.
	3) Any tag that is equal to a masked-tag is removed.";
	}
	leaf-list masked-tag {
	type tag;
	description
	"The list of tags that should not be associated with this
	module. This user can remove (mask) tags by adding
	them to this list. It is not an error to add tags to this
	list that are not associated with the module.";
	}
	}
	}
	}
	<CODE ENDS>
	6. Other Classifications		6. Other Classifications
	It's worth noting that a different YANG module classification		It is worth noting that a different YANG module classification
	document exists [RFC8199]. That document is classifying modules in		document exists [RFC8199]. That document only classifies modules in
	only a logical manner and does not define tagging or any other		a logical manner and does not define tagging or any other mechanisms.
	mechanisms. It divides YANG modules into 2 categories (service or		It divides YANG modules into two categories (service or element) and
	element) and then into one of 3 origins: standard, vendor or user.		then into one of three origins: standard, vendor or user. It does
	It does provide a good way to discuss and identify modules in		provide a good way to discuss and identify modules in general. This
	general. This document defines standard tags to support [RFC8199]		document defines standard tags to support [RFC8199] style
	style classification.		classification.
	7. Guidelines to Model Writers		7. Guidelines to Model Writers
	This section updates [RFC8407].		This section updates [RFC8407].
	7.1. Define Standard Tags		7.1. Define Standard Tags
	A module can indicate using module-tag extension statements a set of		A module MAY indicate, using module-tag extension statements, a set
	tags that are to be automatically associated with it (i.e., not added		of tags that are to be automatically associated with it (i.e., not
	through configuration).		added through configuration).
	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";
	...		...
	}		}
	skipping to change at page 9, line 25 ¶		skipping to change at page 9, line 37 ¶
	8.2. YANG Module IETF Tag Registry		8.2. YANG Module IETF Tag Registry
	This registry allocates prefixes that have the standard prefix		This registry allocates prefixes that have the standard prefix
	"ietf:". New values should be well considered and not achievable		"ietf:". New values should be well considered and not achievable
	through a combination of already existing standard tags.		through a combination of already existing standard tags.
	The allocation policy for this registry is IETF Review [RFC5226].		The allocation policy for this registry is IETF Review [RFC5226].
	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:rfc8199-element | A module for a network | [RFC8199] |		| ietf:network-element-class | A module for a network | [RFC8199] |
	| | element. | |		| | element. | |
	| | | |		| | | |
	| ietf:rfc8199-service | A module for a network | [RFC8199] |		| ietf:network-service-class | A module for a network | [RFC8199] |
	| | service. | |		| | service. | |
	| | | |		| | | |
	| ietf:rfc8199-standard | A module defined by a | [RFC8199] |		| ietf:sdo-defined-class | A module defined by a | [RFC8199] |
	| | standards organization. | |		| | standards organization. | |
	| | | |		| | | |
	| ietf:rfc8199-vendor | A module defined by a | [RFC8199] |		| ietf:vendor-defined-class | A module defined by a | [RFC8199] |
	| | vendor. | |		| | vendor. | |
	| | | |		| | | |
	| ietf:rfc8199-user | A module defined by the | [RFC8199] |		| ietf:user-defined-class | A module defined by the | [RFC8199] |
	| | user. | |		| | user. | |
	| | | |		| | | |
	| ietf:hardware | A module relating to | [This |		| ietf:hardware | A module relating to | [This |
	| | hardware (e.g., inventory). | document] |		| | hardware (e.g., | document] |
	| | | |		| | inventory). | |
	| ietf:software | A module relating to | [This |		| | | |
	| | software (e.g., installed | document] |		| ietf:software | A module relating to | [This |
	| | OS). | |		| | software (e.g., | document] |
	| | | |		| | installed OS). | |
	| ietf:qos | A module for managing | [This |		| | | |
	| | quality of service. | document] |		| ietf:qos | A module for managing | [This |
	| | | |		| | quality of service. | document] |
	| ietf:protocol | A module representing a | [This |		| | | |
	| | protocol. | document] |		| ietf:protocol | A module representing a | [This |
	| | | |		| | protocol. | document] |
	| ietf:system-management | A module relating to system | [This |		| | | |
	| | management (e.g., a system | document] |		| ietf:system-management | A module relating to | [This |
	| | management protocol such as | |		| | system management (e.g., | document] |
	| | syslog, TACAC+, SNMP, | |		| | a system management | |
	| | netconf, ...). | |		| | protocol such as syslog, | |
	| | | |		| | TACAC+, SNMP, netconf, | |
	| ietf:network-service | A module relating to network | [This |		| | ...). | |
	| | service (e.g., a network | document] |		| | | |
	| | service protocol such as an | |		| ietf:network-service | A module relating to | [This |
	| | NTP server, DNS server, DHCP | |		| | network service (e.g., a | document] |
	| | server, etc). | |		| | network service protocol | |
	| | | |		| | such as an NTP server, | |
	| ietf:oam | A module representing | [This |		| | DNS server, DHCP server, | |
	| | Operations, Administration, | document] |		| | etc). | |
	| | and Maintenance (e.g., BFD). | |		| | | |
	| | | |		| ietf:oam | A module representing | [This |
	| ietf:routing | A module related to routing. | [This |		| | Operations, | document] |
	| | | document] |		| | Administration, and | |
	| | | |		| | Maintenance (e.g., BFD). | |
	| ietf:signaling | A module representing | [This |		| | | |
	| | control plane signaling. | document] |		| ietf:routing | A module related to | [This |
	| | | |		| | routing. | document] |
	| ietf:lmp | A module representing a link | [This |		| | | |
	| | management protocol. | document] |		| ietf:signaling | A module representing | [This |
	+------------------------+------------------------------+-----------+		| | control plane signaling. | document] |
			| | | |
			| ietf:lmp | A module representing a | [This |
			| | link management | document] |
			| | protocol. | |
			+----------------------------+--------------------------+-----------+
	Table 1: IETF Module Tag Registry		Table 1: IETF Module Tag Registry
	9. Acknowledgements		9. References
	Special thanks to Robert Wilton for his help improving the
	introduction and providing the example use cases.
	10. References
	10.1. Normative References		9.1. Normative References
	[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate		[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
	Requirement Levels", BCP 14, RFC 2119,		Requirement Levels", BCP 14, RFC 2119,
	DOI 10.17487/RFC2119, March 1997,		DOI 10.17487/RFC2119, March 1997,
	<https://www.rfc-editor.org/info/rfc2119>.		<https://www.rfc-editor.org/info/rfc2119>.
	[RFC5226] Narten, T. and H. Alvestrand, "Guidelines for Writing an		[RFC5226] Narten, T. and H. Alvestrand, "Guidelines for Writing an
	IANA Considerations Section in RFCs", RFC 5226,		IANA Considerations Section in RFCs", RFC 5226,
	DOI 10.17487/RFC5226, May 2008,		DOI 10.17487/RFC5226, May 2008,
	<https://www.rfc-editor.org/info/rfc5226>.		<https://www.rfc-editor.org/info/rfc5226>.
	[RFC6020] Bjorklund, M., Ed., "YANG - A Data Modeling Language for		[RFC7950] Bjorklund, M., Ed., "The YANG 1.1 Data Modeling Language",
	the Network Configuration Protocol (NETCONF)", RFC 6020,		RFC 7950, DOI 10.17487/RFC7950, August 2016,
	DOI 10.17487/RFC6020, October 2010,		<https://www.rfc-editor.org/info/rfc7950>.
	<https://www.rfc-editor.org/info/rfc6020>.
	[RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC		[RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
	2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,		2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
	May 2017, <https://www.rfc-editor.org/info/rfc8174>.		May 2017, <https://www.rfc-editor.org/info/rfc8174>.
	[RFC8199] Bogdanovic, D., Claise, B., and C. Moberg, "YANG Module
	Classification", RFC 8199, DOI 10.17487/RFC8199, July
	2017, <https://www.rfc-editor.org/info/rfc8199>.
	[RFC8407] Bierman, A., "Guidelines for Authors and Reviewers of		[RFC8407] Bierman, A., "Guidelines for Authors and Reviewers of
	Documents Containing YANG Data Models", BCP 216, RFC 8407,		Documents Containing YANG Data Models", BCP 216, RFC 8407,
	DOI 10.17487/RFC8407, October 2018,		DOI 10.17487/RFC8407, October 2018,
	<https://www.rfc-editor.org/info/rfc8407>.		<https://www.rfc-editor.org/info/rfc8407>.
	10.2. Informative References		9.2. Informative References
			[RFC8199] Bogdanovic, D., Claise, B., and C. Moberg, "YANG Module
			Classification", RFC 8199, DOI 10.17487/RFC8199, July
			2017, <https://www.rfc-editor.org/info/rfc8199>.
	[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. Example		[RFC8342] Bjorklund, M., Schoenwaelder, J., Shafer, P., Watsen, K.,
			and R. Wilton, "Network Management Datastore Architecture
			(NMDA)", RFC 8342, DOI 10.17487/RFC8342, March 2018,
			<https://www.rfc-editor.org/info/rfc8342>.
			Appendix A. Acknowledgements
			Special thanks to Robert Wilton for his help improving the
			introduction and providing the example use cases.
			Appendix B. Example
	The following is a fictional example result from a query of the		The following is a fictional example result from a query of the
	module tags list. For the sake of brevity only a few module results		module tags list. For the sake of brevity only a few module results
	are imagined.		are imagined.
	{		{
	"ietf-module-tags:module-tags": {		"ietf-module-tags:module-tags": {
	"module": [		"module": [
	{		{
	"name": "ietf-bfd",		"name": "ietf-bfd",
	"tag": [		"tag": [
	"ietf:protocol",		"ietf:network-element-class",
	"ietf:oam",		"ietf:oam",
	"ietf:rfc8199-element",		"ietf:protocol",
	"ietf:rfc8199-standard"		"ietf:sdo-defined-class"
	]		]
	},		},
	{		{
	"name": "ietf-isis",		"name": "ietf-isis",
	"tag": [		"tag": [
			"ietf:network-element-class",
	"ietf:protocol",		"ietf:protocol",
	"ietf:rfc8199-element",
	"ietf:rfc8199-standard",
	"ietf:routing"		"ietf:routing"
			"ietf:sdo-defined-class",
	]		]
	},		},
	{		{
	"name": "ietf-ssh-server",		"name": "ietf-ssh-server",
	"tag": [		"tag": [
			"ietf:network-element-class",
	"ietf:protocol",		"ietf:protocol",
	"ietf:rfc8199-element",		"ietf:sdo-defined-class",
	"ietf:rfc8199-standard",
	"ietf:system-management"		"ietf:system-management"
	]		]
	}		}
	]		]
	}		}
	}		}
	Authors' Addresses		Authors' Addresses
	Christan Hopps		Christan Hopps
End of changes. 44 change blocks.
	208 lines changed or deleted		224 lines changed or added
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