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An Ontology for RFCs
draft-petithuguenin-rfc-ontology-04

Document Type Active Internet-Draft (individual)
Author Marc Petit-Huguenin
Last updated 2024-01-20
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draft-petithuguenin-rfc-ontology-04
Network Working Group                                  M. Petit-Huguenin
Internet-Draft                                    Impedance Mismatch LLC
Intended status: Experimental                            22 January 2024
Expires: 25 July 2024

                          An Ontology for RFCs
                  draft-petithuguenin-rfc-ontology-04

Abstract

   This document defines an ontology that describes the specifications
   published by the RFC Editor, together with ancillary documents.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on 25 July 2024.

Copyright Notice

   Copyright (c) 2024 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents (https://trustee.ietf.org/
   license-info) in effect on the date of publication of this document.
   Please review these documents carefully, as they describe your rights
   and restrictions with respect to this document.  Code Components
   extracted from this document must include Revised BSD License text as
   described in Section 4.e of the Trust Legal Provisions and are
   provided without warranty as described in the Revised BSD License.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  The RFC Ontology  . . . . . . . . . . . . . . . . . . . . . .   2
   3.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  24
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .  24
   5.  Informative References  . . . . . . . . . . . . . . . . . . .  24
   Appendix A.  Implementation . . . . . . . . . . . . . . . . . . .  24
     A.1.  Examples of Queries . . . . . . . . . . . . . . . . . . .  27
     A.2.  Distribution  . . . . . . . . . . . . . . . . . . . . . .  28
   Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . .  29
   Changelog . . . . . . . . . . . . . . . . . . . . . . . . . . . .  29
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  30

1.  Introduction

   This document defines an ontology that describes the specifications
   published by the RFC Editor, together with ancillary documents like
   errata and RFC series.

   This effort is the continuation of the RFC-Prolog database that was
   described in one of the position papers presented at the IAB Workshop
   on Analyzing IETF Data (AID) [RFC9307].  The schema in that database
   was simplified and reformulated as an ontology.

2.  The RFC Ontology

   The RFC Ontology extends the Bibliographic Ontology [BIBO] and reuse
   elements from the Friend of a friend [FOAF] and DCMI Metadata Terms
   [DCTERMS] ontologies.

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   +----------------+----------------------------------+
   |           Name | bcp                              |
   +----------------+----------------------------------+
   |            URI | ftp://shalmaneser.org/rfc#bcp    |
   +----------------+----------------------------------+
   |           Type | property                         |
   +----------------+----------------------------------+
   |          Label | BCP                              |
   +----------------+----------------------------------+
   |        Comment | The BCP this RFC is part of.     |
   +----------------+----------------------------------+
   |     Inverse of | http://purl.org/dc/terms/hasPart |
   +----------------+----------------------------------+
   |     Has Domain | ftp://shalmaneser.org/rfc#Rfc    |
   +----------------+----------------------------------+
   | Range Includes | ftp://shalmaneser.org/rfc#Bcp    |
   +----------------+----------------------------------+

                          Table 1

   +----------------+-----------------------------------------+
   |           Name | corrects                                |
   +----------------+-----------------------------------------+
   |            URI | ftp://shalmaneser.org/rfc#corrects      |
   +----------------+-----------------------------------------+
   |           Type | property                                |
   +----------------+-----------------------------------------+
   |          Label | Corrects                                |
   +----------------+-----------------------------------------+
   |        Comment | The RFC that this errata corrects.      |
   +----------------+-----------------------------------------+
   | Subproperty of | http://purl.org/ontology/bibo/annotates |
   +----------------+-----------------------------------------+
   |     Has Domain | ftp://shalmaneser.org/rfc#Errata        |
   +----------------+-----------------------------------------+
   | Range Includes | ftp://shalmaneser.org/rfc#Rfc           |
   +----------------+-----------------------------------------+

                             Table 2

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   +----------------+-----------------------------------------+
   |           Name | currentStatus                           |
   +----------------+-----------------------------------------+
   |            URI | ftp://shalmaneser.org/rfc#currentStatus |
   +----------------+-----------------------------------------+
   |           Type | property                                |
   +----------------+-----------------------------------------+
   |          Label | Current RFC status                      |
   +----------------+-----------------------------------------+
   |        Comment | The current status of this RFC.         |
   +----------------+-----------------------------------------+
   |     Has Domain | ftp://shalmaneser.org/rfc#Rfc           |
   +----------------+-----------------------------------------+
   | Range Includes | ftp://shalmaneser.org/rfc#RfcStatus     |
   +----------------+-----------------------------------------+

                             Table 3

   +----------------+----------------------------------------+
   |           Name | errataStatus                           |
   +----------------+----------------------------------------+
   |            URI | ftp://shalmaneser.org/rfc#errataStatus |
   +----------------+----------------------------------------+
   |           Type | property                               |
   +----------------+----------------------------------------+
   |          Label | Errata status                          |
   +----------------+----------------------------------------+
   |        Comment | The status of an errata.               |
   +----------------+----------------------------------------+
   |     Has Domain | ftp://shalmaneser.org/rfc#Errata       |
   +----------------+----------------------------------------+
   | Range Includes | ftp://shalmaneser.org/rfc#ErrataStatus |
   +----------------+----------------------------------------+

                             Table 4

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   +----------------+----------------------------------+
   |           Name | fyi                              |
   +----------------+----------------------------------+
   |            URI | ftp://shalmaneser.org/rfc#fyi    |
   +----------------+----------------------------------+
   |           Type | property                         |
   +----------------+----------------------------------+
   |          Label | FYI                              |
   +----------------+----------------------------------+
   |        Comment | The FYI this RFC is part of.     |
   +----------------+----------------------------------+
   |     Inverse of | http://purl.org/dc/terms/hasPart |
   +----------------+----------------------------------+
   |     Has Domain | ftp://shalmaneser.org/rfc#Rfc    |
   +----------------+----------------------------------+
   | Range Includes | ftp://shalmaneser.org/rfc#Fyi    |
   +----------------+----------------------------------+

                          Table 5

   +-------------+---------------------------------------------------+
   |        Name | informativelyReferences                           |
   +-------------+---------------------------------------------------+
   |         URI | ftp://shalmaneser.org/rfc#informativelyReferences |
   +-------------+---------------------------------------------------+
   |        Type | property                                          |
   +-------------+---------------------------------------------------+
   |       Label | Informatively References                          |
   +-------------+---------------------------------------------------+
   |     Comment | An informative reference in an RFC.               |
   +-------------+---------------------------------------------------+
   | Subproperty | http://purl.org/ontology/bibo/cites               |
   |          of |                                                   |
   +-------------+---------------------------------------------------+
   |  Has Domain | ftp://shalmaneser.org/rfc#Rfc                     |
   +-------------+---------------------------------------------------+

                                 Table 6

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   +----------------+-------------------------------------------------+
   |           Name | normativelyReferences                           |
   +----------------+-------------------------------------------------+
   |            URI | ftp://shalmaneser.org/rfc#normativelyReferences |
   +----------------+-------------------------------------------------+
   |           Type | property                                        |
   +----------------+-------------------------------------------------+
   |          Label | Normatively References                          |
   +----------------+-------------------------------------------------+
   |        Comment | A normative reference in an RFC.                |
   +----------------+-------------------------------------------------+
   | Subproperty of | http://purl.org/ontology/bibo/cites             |
   +----------------+-------------------------------------------------+
   |     Has Domain | ftp://shalmaneser.org/rfc#Rfc                   |
   +----------------+-------------------------------------------------+

                                 Table 7

   +----------------+---------------------------------------+
   |           Name | obsoletedBy                           |
   +----------------+---------------------------------------+
   |            URI | ftp://shalmaneser.org/rfc#obsoletedBy |
   +----------------+---------------------------------------+
   |           Type | property                              |
   +----------------+---------------------------------------+
   |          Label | Obsoleted By                          |
   +----------------+---------------------------------------+
   |        Comment | The RFC that obsoleted this RFC.      |
   +----------------+---------------------------------------+
   | Subproperty of | http://purl.org/dc/terms/isReplacedBy |
   +----------------+---------------------------------------+
   |     Inverse of | ftp://shalmaneser.org/rfc#obsoletes   |
   +----------------+---------------------------------------+
   |     Has Domain | ftp://shalmaneser.org/rfc#Rfc         |
   +----------------+---------------------------------------+
   | Range Includes | ftp://shalmaneser.org/rfc#Rfc         |
   +----------------+---------------------------------------+

                            Table 8

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   +----------------+-------------------------------------+
   |           Name | obsoletes                           |
   +----------------+-------------------------------------+
   |            URI | ftp://shalmaneser.org/rfc#obsoletes |
   +----------------+-------------------------------------+
   |           Type | property                            |
   +----------------+-------------------------------------+
   |          Label | Obsoletes                           |
   +----------------+-------------------------------------+
   |        Comment | An RFC that this RFC obsoletes.     |
   +----------------+-------------------------------------+
   | Subproperty of | http://purl.org/dc/terms/replaces   |
   +----------------+-------------------------------------+
   |     Has Domain | ftp://shalmaneser.org/rfc#Rfc       |
   +----------------+-------------------------------------+
   | Range Includes | ftp://shalmaneser.org/rfc#Rfc       |
   +----------------+-------------------------------------+

                           Table 9

   +----------+--------------------------------------------------------+
   |     Name | processedBy                                            |
   +----------+--------------------------------------------------------+
   |      URI | ftp://shalmaneser.org/rfc#processedBy                  |
   +----------+--------------------------------------------------------+
   |     Type | property                                               |
   +----------+--------------------------------------------------------+
   |    Label | Processed by                                           |
   +----------+--------------------------------------------------------+
   |  Comment | The person or organization that                        |
   |          | processed that errata.                                 |
   +----------+--------------------------------------------------------+
   |      Has | ftp://shalmaneser.org/rfc#Errata                       |
   |   Domain |                                                        |
   +----------+--------------------------------------------------------+
   |    Range | http://xmlns.com/foaf/0.1/Agent                        |
   | Includes |                                                        |
   +----------+--------------------------------------------------------+

                                  Table 10

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   +------------+------------------------------------------------------+
   |       Name | publicationStatus                                    |
   +------------+------------------------------------------------------+
   |        URI | ftp://shalmaneser.org/rfc#publicationStatus          |
   +------------+------------------------------------------------------+
   |       Type | property                                             |
   +------------+------------------------------------------------------+
   |      Label | RFC publication status                               |
   +------------+------------------------------------------------------+
   |    Comment | The status of this RFC at the time it was published. |
   +------------+------------------------------------------------------+
   |        Has | ftp://shalmaneser.org/rfc#Rfc                        |
   |     Domain |                                                      |
   +------------+------------------------------------------------------+
   |      Range | ftp://shalmaneser.org/rfc#RfcStatus                  |
   |   Includes |                                                      |
   +------------+------------------------------------------------------+

                                  Table 11

   +----------+-------------------------------------------------------+
   |     Name | reportedBy                                            |
   +----------+-------------------------------------------------------+
   |      URI | ftp://shalmaneser.org/rfc#reportedBy                  |
   +----------+-------------------------------------------------------+
   |     Type | property                                              |
   +----------+-------------------------------------------------------+
   |    Label | Reported by                                           |
   +----------+-------------------------------------------------------+
   |  Comment | The person or organization that reported that errata. |
   +----------+-------------------------------------------------------+
   |      Has | ftp://shalmaneser.org/rfc#Errata                      |
   |   Domain |                                                       |
   +----------+-------------------------------------------------------+
   |    Range | http://xmlns.com/foaf/0.1/Agent                       |
   | Includes |                                                       |
   +----------+-------------------------------------------------------+

                                 Table 12

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   +----------------+----------------------------------+
   |           Name | std                              |
   +----------------+----------------------------------+
   |            URI | ftp://shalmaneser.org/rfc#std    |
   +----------------+----------------------------------+
   |           Type | property                         |
   +----------------+----------------------------------+
   |          Label | STD                              |
   +----------------+----------------------------------+
   |        Comment | The STD this RFC is part of.     |
   +----------------+----------------------------------+
   |     Inverse of | http://purl.org/dc/terms/hasPart |
   +----------------+----------------------------------+
   |     Has Domain | ftp://shalmaneser.org/rfc#Rfc    |
   +----------------+----------------------------------+
   | Range Includes | ftp://shalmaneser.org/rfc#Std    |
   +----------------+----------------------------------+

                          Table 13

   +---------+------------------------------------+
   |    Name | stream                             |
   +---------+------------------------------------+
   |     URI | ftp://shalmaneser.org/rfc#stream   |
   +---------+------------------------------------+
   |    Type | property                           |
   +---------+------------------------------------+
   |   Label | RFC stream                         |
   +---------+------------------------------------+
   | Comment | The stream that approved that RFC. |
   +---------+------------------------------------+

                       Table 14

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   +----------------+--------------------------------------+
   |           Name | type                                 |
   +----------------+--------------------------------------+
   |            URI | ftp://shalmaneser.org/rfc#type       |
   +----------------+--------------------------------------+
   |           Type | property                             |
   +----------------+--------------------------------------+
   |          Label | Errata type                          |
   +----------------+--------------------------------------+
   |        Comment | The type of the errata.              |
   +----------------+--------------------------------------+
   |     Has Domain | ftp://shalmaneser.org/rfc#Errata     |
   +----------------+--------------------------------------+
   | Range Includes | ftp://shalmaneser.org/rfc#ErrataType |
   +----------------+--------------------------------------+

                            Table 15

   +----------------+-------------------------------------+
   |           Name | updatedBy                           |
   +----------------+-------------------------------------+
   |            URI | ftp://shalmaneser.org/rfc#updatedBy |
   +----------------+-------------------------------------+
   |           Type | property                            |
   +----------------+-------------------------------------+
   |          Label | Updated By                          |
   +----------------+-------------------------------------+
   |        Comment | An RFC that this RFC updated.       |
   +----------------+-------------------------------------+
   |     Inverse of | ftp://shalmaneser.org/rfc#updates   |
   +----------------+-------------------------------------+
   |     Has Domain | ftp://shalmaneser.org/rfc#Rfc       |
   +----------------+-------------------------------------+
   | Range Includes | ftp://shalmaneser.org/rfc#Rfc       |
   +----------------+-------------------------------------+

                           Table 16

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   +----------------+-----------------------------------+
   |           Name | updates                           |
   +----------------+-----------------------------------+
   |            URI | ftp://shalmaneser.org/rfc#updates |
   +----------------+-----------------------------------+
   |           Type | property                          |
   +----------------+-----------------------------------+
   |          Label | Updates                           |
   +----------------+-----------------------------------+
   |        Comment | An RFC that this RFC updates.     |
   +----------------+-----------------------------------+
   |     Has Domain | ftp://shalmaneser.org/rfc#Rfc     |
   +----------------+-----------------------------------+
   | Range Includes | ftp://shalmaneser.org/rfc#Rfc     |
   +----------------+-----------------------------------+

                          Table 17

   +----------------+-----------------------------------------+
   |           Name | area                                    |
   +----------------+-----------------------------------------+
   |            URI | ftp://shalmaneser.org/rfc#area          |
   +----------------+-----------------------------------------+
   |           Type | datatype                                |
   +----------------+-----------------------------------------+
   |          Label | IETF area                               |
   +----------------+-----------------------------------------+
   |        Comment | The IETF area that produced that RFC.   |
   +----------------+-----------------------------------------+
   |     Has Domain | ftp://shalmaneser.org/rfc#Rfc           |
   +----------------+-----------------------------------------+
   | Range Includes | http://www.w3.org/2001/XMLSchema#string |
   +----------------+-----------------------------------------+

                             Table 18

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   +----------------+----------------------------------------------+
   |           Name | initials                                     |
   +----------------+----------------------------------------------+
   |            URI | ftp://shalmaneser.org/rfc#initials           |
   +----------------+----------------------------------------------+
   |           Type | datatype                                     |
   +----------------+----------------------------------------------+
   |          Label | Initials                                     |
   +----------------+----------------------------------------------+
   |        Comment | The initials of an author of an RFC.         |
   +----------------+----------------------------------------------+
   |     Has Domain | http://xmlns.com/foaf/0.1/Person             |
   +----------------+----------------------------------------------+
   | Range Includes | http://www.w3.org/2000/01/rdf-schema#Literal |
   +----------------+----------------------------------------------+

                                Table 19

   +----------+----------------------------------------+
   |     Name | keyword                                |
   +----------+----------------------------------------+
   |      URI | ftp://shalmaneser.org/rfc#keyword      |
   +----------+----------------------------------------+
   |     Type | datatype                               |
   +----------+----------------------------------------+
   |    Label | RFC keyword                            |
   +----------+----------------------------------------+
   |  Comment | One of the keywords of an RFC.  See    |
   |          | https://www.ietf.org/topics/keywords/. |
   +----------+----------------------------------------+
   |      Has | ftp://shalmaneser.org/rfc#Rfc          |
   |   Domain |                                        |
   +----------+----------------------------------------+
   |    Range | http://www.w3.org/2001/                |
   | Includes | XMLSchema#string                       |
   +----------+----------------------------------------+

                          Table 20

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   +----------------+---------------------------------------+
   |           Name | processedOn                           |
   +----------------+---------------------------------------+
   |            URI | ftp://shalmaneser.org/rfc#processedOn |
   +----------------+---------------------------------------+
   |           Type | datatype                              |
   +----------------+---------------------------------------+
   |          Label | Processed on                          |
   +----------------+---------------------------------------+
   |        Comment | The date this errata was processed.   |
   +----------------+---------------------------------------+
   | Subproperty of | http://purl.org/dc/terms/date         |
   +----------------+---------------------------------------+
   |     Has Domain | ftp://shalmaneser.org/rfc#Errata      |
   +----------------+---------------------------------------+

                            Table 21

   +----------------+--------------------------------------+
   |           Name | reportedOn                           |
   +----------------+--------------------------------------+
   |            URI | ftp://shalmaneser.org/rfc#reportedOn |
   +----------------+--------------------------------------+
   |           Type | datatype                             |
   +----------------+--------------------------------------+
   |          Label | Reported on                          |
   +----------------+--------------------------------------+
   |        Comment | The date this errata was reported.   |
   +----------------+--------------------------------------+
   | Subproperty of | http://purl.org/dc/terms/date        |
   +----------------+--------------------------------------+
   |     Has Domain | ftp://shalmaneser.org/rfc#Errata     |
   +----------------+--------------------------------------+

                            Table 22

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   +----------------+------------------------------------------------+
   |           Name | wg                                             |
   +----------------+------------------------------------------------+
   |            URI | ftp://shalmaneser.org/rfc#wg                   |
   +----------------+------------------------------------------------+
   |           Type | datatype                                       |
   +----------------+------------------------------------------------+
   |          Label | IETF WG                                        |
   +----------------+------------------------------------------------+
   |        Comment | The IETF Working Group that produced that RFC. |
   +----------------+------------------------------------------------+
   |     Has Domain | ftp://shalmaneser.org/rfc#Rfc                  |
   +----------------+------------------------------------------------+
   | Range Includes | http://www.w3.org/2001/XMLSchema#string        |
   +----------------+------------------------------------------------+

                                 Table 23

   +------------+------------------------------------------------+
   |       Name | Bcp                                            |
   +------------+------------------------------------------------+
   |        URI | ftp://shalmaneser.org/rfc#Bcp                  |
   +------------+------------------------------------------------+
   |       Type | class                                          |
   +------------+------------------------------------------------+
   |      Label | BCP                                            |
   +------------+------------------------------------------------+
   |    Comment | The Best Current Pratice (BCP) series of RFCs. |
   +------------+------------------------------------------------+
   | subClassOf | http://purl.org/ontology/bibo/Series           |
   +------------+------------------------------------------------+

                               Table 24

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   +------------+--------------------------------------------------+
   |       Name | Errata                                           |
   +------------+--------------------------------------------------+
   |        URI | ftp://shalmaneser.org/rfc#Errata                 |
   +------------+--------------------------------------------------+
   |       Type | class                                            |
   +------------+--------------------------------------------------+
   |      Label | RFC errata                                       |
   +------------+--------------------------------------------------+
   |    Comment | An errata for an RFC, published by the RFC       |
   |            | Editor at https://www.rfc-editor.org/errata.php. |
   +------------+--------------------------------------------------+
   | subClassOf | http://purl.org/ontology/bibo/Note               |
   +------------+--------------------------------------------------+

                                Table 25

   +---------+----------------------------------------+
   |    Name | ErrataStatus                           |
   +---------+----------------------------------------+
   |     URI | ftp://shalmaneser.org/rfc#ErrataStatus |
   +---------+----------------------------------------+
   |    Type | class                                  |
   +---------+----------------------------------------+
   |   Label | RFC Errata Status                      |
   +---------+----------------------------------------+
   | Comment | The current status of an RFC errata.   |
   +---------+----------------------------------------+

                         Table 26

   +---------+-------------------------------------------------+
   |    Name | ErrataType                                      |
   +---------+-------------------------------------------------+
   |     URI | ftp://shalmaneser.org/rfc#ErrataType            |
   +---------+-------------------------------------------------+
   |    Type | class                                           |
   +---------+-------------------------------------------------+
   |   Label | RFC Errata Type                                 |
   +---------+-------------------------------------------------+
   | Comment | The type of errata published by the RFC Editor. |
   +---------+-------------------------------------------------+

                              Table 27

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   +------------+------------------------------------------------+
   |       Name | Fyi                                            |
   +------------+------------------------------------------------+
   |        URI | ftp://shalmaneser.org/rfc#Fyi                  |
   +------------+------------------------------------------------+
   |       Type | class                                          |
   +------------+------------------------------------------------+
   |      Label | FYI                                            |
   +------------+------------------------------------------------+
   |    Comment | The For Your Information (FYI) series of RFCs. |
   +------------+------------------------------------------------+
   | subClassOf | http://purl.org/ontology/bibo/Series           |
   +------------+------------------------------------------------+

                               Table 28

   +------------+-------------------------------------------------+
   |       Name | Internet-Draft                                  |
   +------------+-------------------------------------------------+
   |        URI | ftp://shalmaneser.org/rfc#Internet-Draft        |
   +------------+-------------------------------------------------+
   |       Type | class                                           |
   +------------+-------------------------------------------------+
   |      Label | Internet Draft                                  |
   +------------+-------------------------------------------------+
   |    Comment | A working document of the IETF or other groups. |
   +------------+-------------------------------------------------+
   | subClassOf | http://purl.org/ontology/bibo/Specification     |
   +------------+-------------------------------------------------+

                               Table 29

   +------------+----------------------------------------+
   |       Name | Rfc                                    |
   +------------+----------------------------------------+
   |        URI | ftp://shalmaneser.org/rfc#Rfc          |
   +------------+----------------------------------------+
   |       Type | class                                  |
   +------------+----------------------------------------+
   |      Label | IETF RFC                               |
   +------------+----------------------------------------+
   |    Comment | A document published by the RFC Editor |
   |            | at https://www.rfc-editor.org/.        |
   +------------+----------------------------------------+
   | subClassOf | http://purl.org/ontology/bibo/Standard |
   +------------+----------------------------------------+

                           Table 30

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   +---------+-------------------------------------+
   |    Name | RfcStatus                           |
   +---------+-------------------------------------+
   |     URI | ftp://shalmaneser.org/rfc#RfcStatus |
   +---------+-------------------------------------+
   |    Type | class                               |
   +---------+-------------------------------------+
   |   Label | RFC Status                          |
   +---------+-------------------------------------+
   | Comment | The status of an RFC.               |
   +---------+-------------------------------------+

                        Table 31

   +------------+--------------------------------------+
   |       Name | Std                                  |
   +------------+--------------------------------------+
   |        URI | ftp://shalmaneser.org/rfc#Std        |
   +------------+--------------------------------------+
   |       Type | class                                |
   +------------+--------------------------------------+
   |      Label | STD                                  |
   +------------+--------------------------------------+
   |    Comment | The Standard (STD) series of RFCs.   |
   +------------+--------------------------------------+
   | subClassOf | http://purl.org/ontology/bibo/Series |
   +------------+--------------------------------------+

                          Table 32

   +---------+------------------------------------------------------+
   |    Name | Stream                                               |
   +---------+------------------------------------------------------+
   |     URI | ftp://shalmaneser.org/rfc#Stream                     |
   +---------+------------------------------------------------------+
   |    Type | class                                                |
   +---------+------------------------------------------------------+
   |   Label | RFC Stream                                           |
   +---------+------------------------------------------------------+
   | Comment | The community, known as "stream", that originated an |
   |         | RFC.  See https://www.rfc-editor.org/info/rfc8729.   |
   +---------+------------------------------------------------------+

                                Table 33

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   +---------+-----------------------------------------------+
   |    Name | bestCurrentPractice                           |
   +---------+-----------------------------------------------+
   |     URI | ftp://shalmaneser.org/rfc#bestCurrentPractice |
   +---------+-----------------------------------------------+
   |    Type | ftp://shalmaneser.org/rfc#RfcStatus           |
   +---------+-----------------------------------------------+
   |   Label | Best Current Practice RFC status              |
   +---------+-----------------------------------------------+
   | Comment | An RFC that standardizes practices and the    |
   |         | results of community deliberations.           |
   +---------+-----------------------------------------------+

                             Table 34

   +---------+------------------------------------------------+
   |    Name | draftStandard                                  |
   +---------+------------------------------------------------+
   |     URI | ftp://shalmaneser.org/rfc#draftStandard        |
   +---------+------------------------------------------------+
   |    Type | ftp://shalmaneser.org/rfc#RfcStatus            |
   +---------+------------------------------------------------+
   |   Label | Draft Standard RFC status                      |
   +---------+------------------------------------------------+
   | Comment | The status of an RFC from which at least two   |
   |         | independent and interoperable implementations  |
   |         | from different code bases have been developed, |
   |         | and for which sufficient successful            |
   |         | operational experience has been obtained.      |
   +---------+------------------------------------------------+

                             Table 35

   +---------+---------------------------------------------+
   |    Name | editorial                                   |
   +---------+---------------------------------------------+
   |     URI | ftp://shalmaneser.org/rfc#editorial         |
   +---------+---------------------------------------------+
   |    Type | ftp://shalmaneser.org/rfc#ErrataType        |
   +---------+---------------------------------------------+
   |   Label | Editorial errata                            |
   +---------+---------------------------------------------+
   | Comment | A spelling, grammar, punctuation, or syntax |
   |         | error in an RFC.  See https://www.rfc-      |
   |         | editor.org/errata-definitions/.             |
   +---------+---------------------------------------------+

                            Table 36

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   +---------+----------------------------------------------+
   |    Name | editorialStream                              |
   +---------+----------------------------------------------+
   |     URI | ftp://shalmaneser.org/rfc#editorialStream    |
   +---------+----------------------------------------------+
   |    Type | ftp://shalmaneser.org/rfc#Stream             |
   +---------+----------------------------------------------+
   |   Label | Editorial stream                             |
   +---------+----------------------------------------------+
   | Comment | RFC approved by the editorial stream editor. |
   +---------+----------------------------------------------+

                            Table 37

   +---------+-------------------------------------------------------+
   |    Name | experimental                                          |
   +---------+-------------------------------------------------------+
   |     URI | ftp://shalmaneser.org/rfc#experimental                |
   +---------+-------------------------------------------------------+
   |    Type | ftp://shalmaneser.org/rfc#RfcStatus                   |
   +---------+-------------------------------------------------------+
   |   Label | Experimental RFC status                               |
   +---------+-------------------------------------------------------+
   | Comment | An RFC that is part of some research or development   |
   |         | effort.  See https://www.rfc-editor.org/info/rfc2026. |
   +---------+-------------------------------------------------------+

                                 Table 38

   +---------+--------------------------------------------------------+
   |    Name | held                                                   |
   +---------+--------------------------------------------------------+
   |     URI | ftp://shalmaneser.org/rfc#held                         |
   +---------+--------------------------------------------------------+
   |    Type | ftp://shalmaneser.org/rfc#ErrataStatus                 |
   +---------+--------------------------------------------------------+
   |   Label | Held status                                            |
   +---------+--------------------------------------------------------+
   | Comment | Status of an errata held for a future document update. |
   |         | See https://www.rfc-editor.org/errata-definitions/.    |
   +---------+--------------------------------------------------------+

                                 Table 39

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   +---------+-----------------------------------------+
   |    Name | historic                                |
   +---------+-----------------------------------------+
   |     URI | ftp://shalmaneser.org/rfc#historic      |
   +---------+-----------------------------------------+
   |    Type | ftp://shalmaneser.org/rfc#RfcStatus     |
   +---------+-----------------------------------------+
   |   Label | Historic RFC status                     |
   +---------+-----------------------------------------+
   | Comment | An RFC that has been superseded by a    |
   |         | more recent specification or is for any |
   |         | other reason considered to be obsolete. |
   +---------+-----------------------------------------+

                          Table 40

   +---------+------------------------------------------+
   |    Name | iabStream                                |
   +---------+------------------------------------------+
   |     URI | ftp://shalmaneser.org/rfc#iabStream      |
   +---------+------------------------------------------+
   |    Type | ftp://shalmaneser.org/rfc#Stream         |
   +---------+------------------------------------------+
   |   Label | IAB stream                               |
   +---------+------------------------------------------+
   | Comment | RFC approved by the IAB.  See            |
   |         | https://www.rfc-editor.org/info/rfc4845. |
   +---------+------------------------------------------+

                          Table 41

   +---------+-------------------------------------------------+
   |    Name | ietfStream                                      |
   +---------+-------------------------------------------------+
   |     URI | ftp://shalmaneser.org/rfc#ietfStream            |
   +---------+-------------------------------------------------+
   |    Type | ftp://shalmaneser.org/rfc#Stream                |
   +---------+-------------------------------------------------+
   |   Label | IETF stream                                     |
   +---------+-------------------------------------------------+
   | Comment | RFC approved by the IETF.  See https://www.rfc- |
   |         | editor.org/info/rfc2026 and successors.         |
   +---------+-------------------------------------------------+

                              Table 42

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   +---------+----------------------------------------------+
   |    Name | independentStream                            |
   +---------+----------------------------------------------+
   |     URI | ftp://shalmaneser.org/rfc#independentStream  |
   +---------+----------------------------------------------+
   |    Type | ftp://shalmaneser.org/rfc#Stream             |
   +---------+----------------------------------------------+
   |   Label | Independent stream                           |
   +---------+----------------------------------------------+
   | Comment | RFC approved by the independent editor.  See |
   |         | https://www.rfc-editor.org/info/rfc2026.     |
   +---------+----------------------------------------------+

                            Table 43

   +---------+------------------------------------------------------+
   |    Name | informational                                        |
   +---------+------------------------------------------------------+
   |     URI | ftp://shalmaneser.org/rfc#informational              |
   +---------+------------------------------------------------------+
   |    Type | ftp://shalmaneser.org/rfc#RfcStatus                  |
   +---------+------------------------------------------------------+
   |   Label | Informational RFC status                             |
   +---------+------------------------------------------------------+
   | Comment | An RFC that is published for the general information |
   |         | of the Internet community, and does not represent an |
   |         | Internet community consensus or recommendation.      |
   +---------+------------------------------------------------------+

                                Table 44

   +---------+------------------------------------------------------+
   |    Name | internetStandard                                     |
   +---------+------------------------------------------------------+
   |     URI | ftp://shalmaneser.org/rfc#internetStandard           |
   +---------+------------------------------------------------------+
   |    Type | ftp://shalmaneser.org/rfc#RfcStatus                  |
   +---------+------------------------------------------------------+
   |   Label | Internet Standard RFC status                         |
   +---------+------------------------------------------------------+
   | Comment | An RFC for which significant implementation and      |
   |         | successful operational experience has been obtained. |
   +---------+------------------------------------------------------+

                                Table 45

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   +---------+------------------------------------------+
   |    Name | irtfStream                               |
   +---------+------------------------------------------+
   |     URI | ftp://shalmaneser.org/rfc#irtfStream     |
   +---------+------------------------------------------+
   |    Type | ftp://shalmaneser.org/rfc#Stream         |
   +---------+------------------------------------------+
   |   Label | IRTF stream                              |
   +---------+------------------------------------------+
   | Comment | RFC approved by the IRTF.  See           |
   |         | https://www.rfc-editor.org/info/rfc5743. |
   +---------+------------------------------------------+

                          Table 46

   +---------+-----------------------------------------------+
   |    Name | proposedStandard                              |
   +---------+-----------------------------------------------+
   |     URI | ftp://shalmaneser.org/rfc#proposedStandard    |
   +---------+-----------------------------------------------+
   |    Type | ftp://shalmaneser.org/rfc#RfcStatus           |
   +---------+-----------------------------------------------+
   |   Label | Proposed Standard RFC status                  |
   +---------+-----------------------------------------------+
   | Comment | An RFC that is generally stable, has resolved |
   |         | known design choices, is believed to be well- |
   |         | understood, has received significant          |
   |         | community review, and appears to enjoy enough |
   |         | community interest to be considered valuable. |
   +---------+-----------------------------------------------+

                             Table 47

   +---------+--------------------------------------------+
   |    Name | rejected                                   |
   +---------+--------------------------------------------+
   |     URI | ftp://shalmaneser.org/rfc#rejected         |
   +---------+--------------------------------------------+
   |    Type | ftp://shalmaneser.org/rfc#ErrataStatus     |
   +---------+--------------------------------------------+
   |   Label | Rejected status                            |
   +---------+--------------------------------------------+
   | Comment | The status of an RFC errata that has been  |
   |         | rejected as invalid.  See https://www.rfc- |
   |         | editor.org/errata-definitions/.            |
   +---------+--------------------------------------------+

                           Table 48

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   +---------+-------------------------------------------------+
   |    Name | reported                                        |
   +---------+-------------------------------------------------+
   |     URI | ftp://shalmaneser.org/rfc#reported              |
   +---------+-------------------------------------------------+
   |    Type | ftp://shalmaneser.org/rfc#ErrataStatus          |
   +---------+-------------------------------------------------+
   |   Label | Reported status                                 |
   +---------+-------------------------------------------------+
   | Comment | The initial status of an RFC errata.  See       |
   |         | https://www.rfc-editor.org/errata-definitions/. |
   +---------+-------------------------------------------------+

                              Table 49

   +---------+---------------------------------------------------+
   |    Name | technical                                         |
   +---------+---------------------------------------------------+
   |     URI | ftp://shalmaneser.org/rfc#technical               |
   +---------+---------------------------------------------------+
   |    Type | ftp://shalmaneser.org/rfc#ErrataType              |
   +---------+---------------------------------------------------+
   |   Label | Technical errata                                  |
   +---------+---------------------------------------------------+
   | Comment | An error in the technical content of an RFC.  See |
   |         | https://www.rfc-editor.org/errata-definitions/.   |
   +---------+---------------------------------------------------+

                               Table 50

   +---------+-------------------------------------------------+
   |    Name | verified                                        |
   +---------+-------------------------------------------------+
   |     URI | ftp://shalmaneser.org/rfc#verified              |
   +---------+-------------------------------------------------+
   |    Type | ftp://shalmaneser.org/rfc#ErrataStatus          |
   +---------+-------------------------------------------------+
   |   Label | Verified status                                 |
   +---------+-------------------------------------------------+
   | Comment | The status of an RFC errata that has been       |
   |         | verified as being correct.  See                 |
   |         | https://www.rfc-editor.org/errata-definitions/. |
   +---------+-------------------------------------------------+

                              Table 51

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3.  IANA Considerations

   No IANA considerations in this document.

4.  Security Considerations

   The information in that document are derived from publicly available
   databases, so they do not present more security risk.

5.  Informative References

   [BIBO]     D'Arcus, B., Giasson, F., and DCMI Usage Board,
              "Bibliographic Ontology", 11 November 2009,
              <https://www.dublincore.org/specifications/bibo/>.

   [DCTERMS]  DCMI Usage Board, "DCMI Metadata Terms", 20 January 2020,
              <https://www.dublincore.org/specifications/dublin-core/
              dcmi-terms/>.

   [ErgoAI]   "ErgoAI", Accessed 22 July 2023,
              <https://github.com/ErgoAI>.

   [FOAF]     Brickley, D. and L. Miller, "FOAF Vocabulary Specification
              0.99", 14 January 2014,
              <https://web.archive.org/web/20220518003509/
              http://xmlns.com/foaf/spec/20140114.html>.

   [RFC9307]  ten Oever, N., Cath, C., Kühlewind, M., and C. S. Perkins,
              "Report from the IAB Workshop on Analyzing IETF Data (AID)
              2021", RFC 9307, DOI 10.17487/RFC9307, September 2022,
              <https://www.rfc-editor.org/info/rfc9307>.

   [Zotero]   Corporation for Digital Scholarship, "Zotero | Your
              personal research assistant", Accessed 20 January 2023,
              <https://www.zotero.org/>.

Appendix A.  Implementation

   An implementation of the RFC ontology using the programming language
   Ergo [ErgoAI] is provided.

   The "rfcs.ergo" file contains the list of all RFCs, BCPs, STDs, and
   FYIs.

   The following example shows an RFC metadata encoded in Ergo:

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   \"https://www.rfc-editor.org/info/rfc9306":rfc#Rfc
     [ rfc#number -> 9306
     , terms#title ->
   'Vendor-Specific LISP Canonical Address Format (LCAF)'
     , terms#creator -> {\#1, \#2, \#3, \#4, \#5}
     , bibo#authorList -> [\#1, \#2, \#3, \#4, \#5]
     , rfc#date -> '2022-10'
     , terms#format ->
   {'text/html', 'text/plain', 'application/pdf', 'text/xml'}
     , rfc#keyword ->
   {'lisp', 'lcaf', 'internal', 'domain', 'organization', 'private'}
     , bibo#abstract -> 'This document describes a ...'
     , terms#isVersionOf ->
   \"https://datatracker.ietf.org/doc/draft-ietf-lisp-vendor-lcaf-12"
     , rfc#updates ->
   {\"https://www.rfc-editor.org/info/rfc8060":rfc#Rfc}
     , rfc#publicationStatus -> rfc#experimental
     , rfc#currentStatus -> rfc#experimental
     , rfc#stream -> rfc#ietf
     , rfc#area -> 'rtg'
     , rfc#wg -> 'lisp'
     , bibo#doi -> '10.17487/RFC9306'
     , rfc#normativelyReferences ->
       { \"https://ieeexplore.ieee.org/document/6847097"
       , \"https://www.rfc-editor.org/info/rfc2119"
       , \"https://www.rfc-editor.org/info/rfc8060"
       , \"https://www.rfc-editor.org/info/rfc8126"
       , \"https://www.rfc-editor.org/info/rfc8174"
       , \"https://www.rfc-editor.org/info/rfc9300"
       , \"https://www.rfc-editor.org/info/rfc9301"
       }
       ]
     , \#1:foaf#Person
       [ foaf#name -> 'Alberto Rodriguez-Natal'
       , foaf#familyName -> 'Rodriguez-Natal'
       , rfc#initials -> 'A.'
       ]
     , \#2:foaf#Person
       [ foaf#name -> 'Vina Ermagan'
       , foaf#familyName -> 'Ermagan'
       , rfc#initials -> 'V.'
       ]
     , \#3:foaf#Person
       [ foaf#name -> 'Anton Smirnov'
       , foaf#familyName -> 'Smirnov'
       , rfc#initials -> 'A.'
       ]
     , \#4:foaf#Person

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       [ foaf#name -> 'Vrushali Ashtaputre'
       , foaf#familyName -> 'Ashtaputre'
       , rfc#initials -> 'V.'
       ]
     , \#5:foaf#Person
       [ foaf#name -> 'Dino Farinacci'
       , foaf#familyName -> 'Farinacci'
       , rfc#initials -> 'D.'
       ]
     .

   Comments on some non-obvious encoding:

   *  "terms#creator" contains the set of authors.  This uses a Skolem
      symbol to represents the fact that we do not have a resource for
      the person, but we want to define it only once (equivalent to a
      blank node).  The mathematically inclined can think of this as an
      existential quantifier ("there exists a person named…").

   *  "terms#editor", not present in this example, would contain the set
      of editors.

   *  "bibo#authorList" contains the ordered list of all authors and
      editors.

   *  "rfc#normativelyReferences" or "rfc#informativeReferences" are
      difficult to parse in RFCs that were not published in xml2rfc
      format, so this is currently work in progress.

   The following example shows a BCP encoded in Ergo:

   \"https://www.rfc-editor.org/info/bcp0003":rfc#Bcp
     [ rfc#number -> 3
     , bibo#hasPart ->
       { \"https://www.rfc-editor.org/info/rfc1915"
       }
     ].

   STD and FYI are encoded similarly, substituting respectively
   "rfc#Std" and "rfc#Fyi" to "rfc#Bcp".

   The "errata.flr" file contains the list of all Errata.

   The following example shows an Errata encoded in Ergo:

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   \"https://www.rfc-editor.org/errata/eid5866":rfc#Errata
     [ rfc#id -> 5866
     , rfc#corrects -> \"https://www.rfc-editor.org/info/rfc0005":rfc#Rfc
     , rfc#type -> rfc#editorial
     , rfc#status -> rfc#verified
     , rfc#reportedBy -> \#:foaf#Person[foaf#name -> 'Martin Thomson']
     , rfc#reportedOn -> "2019-09-26"^^\date
     , rfc#processedBy -> \#:foaf#Person[foaf#name -> 'Benjamin Kaduk']
     , rfc#processedOn -> "2019-09-26"^^\date
     ].

   The git repository also contains a [Zotero] importer for the same
   "rfc-index.xml" file that is used to build the "rfcs.flr" file.  The
   simplest way to install it is to create a symbolic link for the "RFC-
   Index.js" file in the subdirectory "translators" of the "~/.zotero"
   directory.

A.1.  Examples of Queries

   The examples that follow can be executed in the Ergo REPL ("runergo"
   or "runergo.bat").

   The Flora-2 REPL can be either run from the local machine or from
   Docker:

      docker build --build-arg uid=$(id -u) -t runergo:latest . \
        && docker run --rm -it -u $(id -u):$(id -g) -v $(pwd):/ergo \
        runergo

   The files must be loaded after starting the REPL:

      [schema,+rfcs,+errata].

   Note that loading the files should take a minute the first time, but
   around one second after that.  Queries should not take more than a
   few hundred milliseconds to run.

   Listing all the April Fools's Day RFCS:

      ?:rfc#Rfc[rfc#number -> ?rfc, rfc#date -> ?_d],
        ?_d[endsWith('-04-01')]@\btp.

   Listing all the RFCs that cites RFC 5234, normatively or
   informatively:

      ?_abnf:rfc#Rfc[rfc#number -> 5234],
        ?:rfc#Rfc[bibo#cites -> ?_abnf,
        rfc#number -> ?rfc, terms#title -> ?title].

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   Identify all the RFCs that are descendants of a particular RFC by
   traversing the set of RFC update and obsolete relationships.  Save
   that code in a file named "desc.ergo", then load it in the REPL with
   [schema,+rfcs,+desc].. Then descendant(<rfc-number>, ?rfc). will
   return the descendants.

      descendant(?number, ?rfc) :-
        ?_rfc:rfc#Rfc[rfc#number -> ?number],
      descendant_1(?_rfc, ?rfc).

      descendant_1(?x, ?z) :-
        ?z:rfc#Rfc[rfc#updates -> ?x].
      descendant_1(?x, ?z) :-
        ?z:rfc#Rfc[rfc#obsoletes -> ?x].
      descendant_1(?x, ?z) :-
        ?y:rfc#Rfc[rfc#updates -> ?x],
        descendant_1(?y, ?z).
      descendant_1(?x, ?z) :-
        ?y:rfc#Rfc[rfc#obsoletes -> ?x],
        descendant_1(?y, ?z).

   Finding the transitive closure of normative references to an RFC,
   i.e., all RFCs that normatively reference that RFC or an RFC already
   in the list.  Save that code in a file named "tran.ergo", then load
   it in the REPL with [schema,+rfcs,+tran].. Then
   transitive_closure(<rfc-number>, ?rfc). will return the transitive
   closure.

      transitive_closure(?number, ?rfc) :-
        ?_rfc:rfc#Rfc[rfc#number -> ?number],
        transitive_closure_1(?_rfc, ?rfc).

      transitive_closure_1(?x, ?z) :-
      ?z:rfc#Rfc[rfc#normativelyReferences -> ?x].
      transitive_closure_1(?x, ?z) :-
        ?y:rfc#Rfc[rfc#normativelyReferences -> ?x],
        transitive_closure_1(?y, ?z).

   More examples will be provided in future versions of this draft.
   Suggestions are welcome.

A.2.  Distribution

   The files are distributed as a git repository that can be cloned with
   the following command:

   git clone git://shalmaneser.org/VejlapAknul1 rfc-ontology-ergo

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   This git repository is mirrored in various locations over the world,
   with the GPS coordinates in decimal degrees of all these locations
   stored in the DNS as a TXT resource record.  The "dig +dnssec txt
   shalmaneser.org" command can be used to find these locations and
   substitute the closest subdomain in the git URL above.

   The git repository is updated most Mondays before 23:59:59 UTC with a
   new commit that covers new RFCs, Errata, or changes in status.  The
   date of the next planned update is added of the comment of each
   commit.

   The "update" script that is used to update the files is distributed
   in the git repository, so they these files can be updated in case the
   current maintainer is unable to do so.  The list of tools to install
   prior to running the script is in that script.

   The code in that repository is licensed under an AGPL3+ license.

Acknowledgements

   Thanks to John Levine and Robert Sparks for their help in gathering
   the information used for populating the knowledge graphs.

   Thanks to Scott Hollenbeck and Carsten Bormann for the ideas for the
   example queries.

   No technology that cannot explain its own results (LLM, AI/ML) have
   been involved in the creation of this document or its associated
   tooling.

Changelog

   draft-petithuguenin-rfc-ontology-04:
      *  Document:
         -  Fixed the examples.
      *  Repository:
         -  Update the scripts to use python venv.

   draft-petithuguenin-rfc-ontology-03:
      *  Document:
         -  Replaced Flora-2 with Ergo.
         -  Update examples.
      *  Repository:
         -  Fixed some type-checking issues.

   draft-petithuguenin-rfc-ontology-02:
      *  Document:
         -  Add Internet-Draft class.

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         -  Add two examples of queries.
         -  Add explanations for the Zotero importer for rfc-index.xml.
         -  Add Docker command line.
      *  Repository:
         -  New Dockerfile.
         -  The errata are now ordered by id.
         -  Errata generation now is done in two steps.
         -  The text of the errata is no longer saved.
         -  The list of RFC is now stored in /tmp.

   draft-petithuguenin-rfc-ontology-01:
      *  Document:
         -  Change the ontology iri to something resolvable.
         -  Reorder the range/domain.
      *  Repository:
         -  Move the rfc.xml file to an ftp server so it can be loaded
            in Protege.

Author's Address

   Marc Petit-Huguenin
   Impedance Mismatch LLC
   Email: marc@petit-huguenin.org

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