Network Working Group J. Fuller Internet-Draft 26 December 2022 Intended status: Informational Expires: 29 June 2023 Temporal URI scheme draft-temporal-uri-scheme-00 Abstract This document registers the "dt" URI scheme, to unambiguously identify a discrete point in time. Note to Readers _RFC EDITOR: please remove this section before publication_ The issues list for this draft can be found at https://github.com/xquery/temporal-uri-scheme (https://github.com/xquery/temporal-uri-scheme). * Editor's Copy (https://xquery.github.io/temporal-uri- scheme/#go.draft-todo-temporal-uri-scheme.html) * Datatracker Page (https://datatracker.ietf.org/doc/draft-todo- temporal-uri-scheme) 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. 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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. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1. Notational Conventions . . . . . . . . . . . . . . . . . 2 2. The "temporal" URI Scheme . . . . . . . . . . . . . . . . . . 2 3. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 3 4. Security Considerations . . . . . . . . . . . . . . . . . . . 4 5. Normative References . . . . . . . . . . . . . . . . . . . . 4 Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . 4 Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 4 1. Introduction This document defines the URI scheme "dt", which describes resources identified by date-time. 1.1. Notational Conventions The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL 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. This document uses ABNF [RFC5234]. It also uses the date-time rule from [RFC3339]. 2. The "temporal" URI Scheme The "temporal" URI scheme allows for the construction of a URI which represents a discrete point in time. Fuller Expires 29 June 2023 [Page 2] Internet-Draft Temporal URI scheme December 2022 temporal-URI = temporal-scheme ":" dt temporal-scheme = "dt" dt = date-time See [RFC3339], Section 5.6.3 for a definition of date-time. For example, given the URI: dt:20221222T162813Z Would represent a discrete point in time of "2022-12-22T16:28:13Z". The following examples would also be valid URIs: dt:2022-12-22T16:28:13Z dt:1985-04-12T23:20:50.52Z This RFC intentionally provides no definition of how URI's might be parsed or compared by applications using them. For example, it is possible to define two URI's which refer to the exact same point in time and it is left to consuming application (or some future specification) to define what that might 'mean'. 3. IANA Considerations This document registers the following value in the "Uniform Resource Identifier (URI) Schemes" registry: Scheme name: dt Status: provisional Applications/protocols that use this scheme: none yet Contact: iesg@iesg.org Change Controller: IESG References: (this document) Fuller Expires 29 June 2023 [Page 3] Internet-Draft Temporal URI scheme December 2022 4. Security Considerations TBA 5. Normative References [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997, . [RFC3339] Klyne, G. and C. Newman, "Date and Time on the Internet: Timestamps", RFC 3339, DOI 10.17487/RFC3339, July 2002, . [RFC5234] Crocker, D., Ed. and P. Overell, "Augmented BNF for Syntax Specifications: ABNF", STD 68, RFC 5234, DOI 10.17487/RFC5234, January 2008, . [RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC 2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174, May 2017, . Acknowledgements The definition of date-time is from [RFC3339]. Author's Address James Fuller Prague Czech Republic Email: jim@webcomposite.com URI: https://jim.fuller.name/ Fuller Expires 29 June 2023 [Page 4]