Constrained RESTful Environments (CoRE) Link Format
RFC 6690
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Document |
Type |
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RFC - Proposed Standard
(August 2012; Errata)
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Author |
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Zach Shelby
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Last updated |
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2015-10-14
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Replaces |
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draft-shelby-core-link-format
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IETF
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plain text
html
pdf
htmlized
bibtex
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Reviews |
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Stream |
WG state
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Submitted to IESG for Publication
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Document shepherd |
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Carsten Bormann
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Shepherd write-up |
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Show
(last changed 2012-02-14)
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IESG |
IESG state |
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RFC 6690 (Proposed Standard)
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Consensus Boilerplate |
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Unknown
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Telechat date |
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Responsible AD |
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Barry Leiba
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IESG note |
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Carsten Bormann (cabo@tzi.org) is the document shepherd.
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Send notices to |
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(None)
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Internet Engineering Task Force (IETF) Z. Shelby
Request for Comments: 6690 Sensinode
Category: Standards Track August 2012
ISSN: 2070-1721
Constrained RESTful Environments (CoRE) Link Format
Abstract
This specification defines Web Linking using a link format for use by
constrained web servers to describe hosted resources, their
attributes, and other relationships between links. Based on the HTTP
Link Header field defined in RFC 5988, the Constrained RESTful
Environments (CoRE) Link Format is carried as a payload and is
assigned an Internet media type. "RESTful" refers to the
Representational State Transfer (REST) architecture. A well-known
URI is defined as a default entry point for requesting the links
hosted by a server.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc6690.
Copyright Notice
Copyright (c) 2012 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
(http://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 Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Shelby Standards Track [Page 1]
RFC 6690 CoRE Link Format August 2012
Table of Contents
1. Introduction ....................................................3
1.1. Web Linking in CoRE ........................................3
1.2. Use Cases ..................................................4
1.2.1. Discovery ...........................................4
1.2.2. Resource Collections ................................5
1.2.3. Resource Directory ..................................5
1.3. Terminology ................................................6
2. Link Format .....................................................6
2.1. Target and Context URIs ....................................8
2.2. Link Relations .............................................8
2.3. Use of Anchors .............................................9
3. CoRE Link Attributes ............................................9
3.1. Resource Type 'rt' Attribute ...............................9
3.2. Interface Description 'if' Attribute ......................10
3.3. Maximum Size Estimate 'sz' Attribute ......................10
4. Well-Known Interface ...........................................10
4.1. Query Filtering ...........................................12
5. Examples .......................................................13
6. Security Considerations ........................................15
7. IANA Considerations ............................................16
7.1. Well-Known 'core' URI .....................................16
7.2. New 'hosts' Relation Type .................................16
7.3. New 'link-format' Internet Media Type .....................17
7.4. Constrained RESTful Environments (CoRE) Parameters
Registry ..................................................18
8. Acknowledgments ................................................19
9. References .....................................................20
9.1. Normative References ......................................20
9.2. Informative References ....................................20
Shelby Standards Track [Page 2]
RFC 6690 CoRE Link Format August 2012
1. Introduction
The Constrained RESTful Environments (CoRE) realizes the
Representational State Transfer (REST) architecture [REST] in a
suitable form for the most constrained nodes (e.g., 8-bit
microcontrollers with limited memory) and networks (e.g., IPv6 over
Low-Power Wireless Personal Area Networks (6LoWPANs) [RFC4919]).
CoRE is aimed at Machine-to-Machine (M2M) applications such as smart
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