Dynamic Resource Linking for Constrained RESTful Environments
draft-ietf-core-dynlink-11
CoRE Working Group M. Koster
Internet-Draft SmartThings
Intended status: Informational B. Silverajan, Ed.
Expires: January 14, 2021 Tampere University
July 13, 2020
Dynamic Resource Linking for Constrained RESTful Environments
draft-ietf-core-dynlink-11
Abstract
This specification defines Link Bindings, which provide dynamic
linking of state updates between resources, either on an endpoint or
between endpoints, for systems using CoAP (RFC7252). This
specification also defines Conditional Notification Attributes that
work with Link Bindings or with CoAP Observe (RFC7641).
Editor note
The git repository for the draft is found at https://github.com/core-
wg/dynlink
Status of This Memo
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Conditional Notification Attributes . . . . . . . . . . . . . 4
3.1. Attribute Definitions . . . . . . . . . . . . . . . . . . 4
3.1.1. Minimum Period (pmin) . . . . . . . . . . . . . . . . 5
3.1.2. Maximum Period (pmax) . . . . . . . . . . . . . . . . 5
3.1.3. Change Step (st) . . . . . . . . . . . . . . . . . . 5
3.1.4. Greater Than (gt) . . . . . . . . . . . . . . . . . . 6
3.1.5. Less Than (lt) . . . . . . . . . . . . . . . . . . . 6
3.1.6. Notification Band (band) . . . . . . . . . . . . . . 6
3.2. Server processing of Conditional Notification Attributes 8
4. Link Bindings . . . . . . . . . . . . . . . . . . . . . . . . 8
4.1. The "bind" attribute and Binding Methods . . . . . . . . 9
4.1.1. Polling . . . . . . . . . . . . . . . . . . . . . . . 10
4.1.2. Observe . . . . . . . . . . . . . . . . . . . . . . . 10
4.1.3. Push . . . . . . . . . . . . . . . . . . . . . . . . 11
4.1.4. Execute . . . . . . . . . . . . . . . . . . . . . . . 11
4.2. Link Relation . . . . . . . . . . . . . . . . . . . . . . 11
5. Binding Table . . . . . . . . . . . . . . . . . . . . . . . . 12
6. Implementation Considerations . . . . . . . . . . . . . . . . 13
7. Security Considerations . . . . . . . . . . . . . . . . . . . 14
8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 14
8.1. Resource Type value 'core.bnd' . . . . . . . . . . . . . 14
8.2. Link Relation Type . . . . . . . . . . . . . . . . . . . 14
9. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 15
10. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 15
11. Changelog . . . . . . . . . . . . . . . . . . . . . . . . . . 16
12. References . . . . . . . . . . . . . . . . . . . . . . . . . 18
12.1. Normative References . . . . . . . . . . . . . . . . . . 18
12.2. Informative References . . . . . . . . . . . . . . . . . 18
Appendix A. Examples . . . . . . . . . . . . . . . . . . . . . . 19
A.1. Minimum Period (pmin) example . . . . . . . . . . . . . . 19
A.2. Maximum Period (pmax) example . . . . . . . . . . . . . . 20
A.3. Greater Than (gt) example . . . . . . . . . . . . . . . . 21
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