Candidate Recommendation Snapshot: Web of Things (WoT) Architecture 1.1 (Call for Wide Review)

Web of Things (WoT) Architecture 1.1

https://www.w3.org/TR/2023/CR-wot-architecture11-20230119/

feedback due by: February 16, 2023

Published by
 Web of Things Working Group

Abstract

The W3C Web of Things (WoT) enables interoperability across IoT platforms and application domains. The goal of the WoT is to preserve and complement existing IoT standards and solutions. The W3C WoT architecture is designed to describe what exists, and only prescribes new mechanisms when necessary. 

This WoT Architecture specification describes the abstract architecture for the W3C Web of Things. This abstract architecture is based on requirements that were derived from use cases for multiple application domains. Several modular building blocks were identified whose detailed specifications are given in other documents. This document describes how these building blocks are related and work together. The WoT abstract architecture defines a basic conceptual framework that can be mapped onto a variety of concrete deployment scenarios, several examples of which are given. However, the abstract architecture described in this specification does not itself define concrete mechanisms or prescribe any concrete implementation. 
 
  * Sections 4 and 5 (Application Domains and Common Deployment Patterns) explain ways to use WoT. These sections are self contained, do not contain any assertion and other specifications do not depend on these sections. 
  * Section 6 Abstract WoT System Architecture, explains architectural elements of the W3C WoT. This section is normative and contains assertions that are relevant for WoT implementations. 
  * Section 7 WoT Building Blocks, explains building blocks of the W3C WoT. 
  * Section 8 Abstract Servient Architecture describes the architecture of a Servient. It informatively describes how to implement a WoT Runtime on a device. 
  * Section 9 Example WoT Deployments provides various examples of how the Web of Things (WoT) abstract architecture may be instantiated when devices and services that implement the Thing and Consumer roles interact in different network topologies. 
  * Section 10 Security Considerations and Section 11 Privacy Considerations are normative; they summarize some general issues and provide guidelines to help preserve the security and privacy of concrete WoT implementations.

Status of the Document

This section describes the status of this document at the time of its publication. A list of current W3C publications and the latest revision of this technical report can be found in the W3C technical reports index at https://www.w3.org/TR/. 

The Web of Things Working Group intends to submit this document for consideration as a W3C Proposed Recommendation after at least the minimum CR review period has passed. However, before PR transition is requested, any features or assertions currently marked as at-risk that did not appear in the Architecture 1.0 specification and do not have at least two implementations at that time will either be removed or converted into informative statements, as appropriate. 

At the time of CR transition, due to insufficient implementation experience the following features are at risk: 
 
  * Caching of hypermedia controls for offline processing. arch-hypermedia-caching. 
  * Generation of interfaces for other protocols by an intermediary. arch-intermediary-td-extra-protocols.  

In addition, a number of assertions in the Privacy Considerations and Security Considerations sections are at risk: 
 
  * arch-privacy-consideration-explicit-pii 
  * arch-security-consideration-avoid-direct 
  * arch-security-consideration-communication-binding 
  * arch-security-consideration-communication-platform 
  * arch-security-consideration-dtls-1-3 
  * arch-security-consideration-hal-refuse-unsafe 
  * arch-security-consideration-isolation-sensitive 
  * arch-security-consideration-isolation-tenants 
  * arch-security-consideration-secure-cred-isolation 
  * arch-security-consideration-secure-update 
  * arch-security-consideration-segmented-network 
  * arch-security-consideration-tls-recommended-priv 
  * arch-security-consideration-use-hal 
  * arch-security-consideration-use-psk  

These represent best practices but often relate to deployment policy rather than implementations and in some cases are difficult to validate. The intention is to complete as many of these as possible by PR; those that cannot be validated but that represent best-practice recommendations will be converted into informative statements. 

At-risk assertions are marked with yellow highlighting. 

This document was published by the Web of Things Working Group as a Candidate Recommendation Snapshot using the Recommendation track. 

Publication as a Candidate Recommendation does not imply endorsement by W3C and its Members. A Candidate Recommendation Snapshot has received wide review, is intended to gather implementation experience, and has commitments from Working Group members to royalty-free licensing for implementations. 

This Candidate Recommendation is not expected to advance to Proposed Recommendation any earlier than 16 February 2023. 

This document was produced by a group operating under the W3C Patent Policy. W3C maintains a public list of any patent disclosures made in connection with the deliverables of the group; that page also includes instructions for disclosing a patent. An individual who has actual knowledge of a patent which the individual believes contains Essential Claim(s) must disclose the information in accordance with section 6 of the W3C Patent Policy. 

This document is governed by the 2 November 2021 W3C Process Document.

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Received on Thursday, 19 January 2023 09:08:09 UTC