The Second Screen Working Group Patent Advisory Group (PAG), launched in August 2021 in response to disclosures related to a specification of the Second Screen Working Group, has issued a Call for Prior Art to seek prior art that is available in the public domain or on terms consistent with W3C’s Royalty-Free Licensing Requirements.

Public comments may be directed to public-secondscreen-pag@w3.org (public archive) by 31 March 2022. For more information about the Second Screen Working Group PAG, see its home page and charter.

The Web Performance Working Group invites implementations of two Candidate Recommendation Snapshots:

• User Timing defines an interface to help web developers measure the performance of their applications by giving them access to high precision timestamps.
• Performance Timeline extends the High Resolution Time specification [HR-TIME-3] by providing methods to store and retrieve high resolution performance metric data.

Comments are welcome by 01 February 2022.

The MiniApps Working Group has published a First Public Working Draft of MiniApp Packaging. This specification defines semantics and conformance requirements for a MiniApp package, and the structure of the single file container that holds the resources of a MiniApp, including a manifest file, static page templates, stylesheets, JavaScript documents, media files and other resources. Instances of the MiniApp package are used for MiniApp distribution and execution on runtime environments (MiniApp user agent).

The Working Group welcomes comments via the GitHub repository issues.

The Accessible Rich Internet Applications Working Group has published a First Public Working Draft of Digital Publishing Accessibility API Mappings 1.1. The Digital Publishing Accessibility API Mappings (DPub-AAM) defines how user agents map the Digital Publishing WAI-ARIA Module [dpub-aria-1.1] markup to platform accessibility APIs . It is intended for user agent developers responsible for accessibility in their user agent so that they can support the accessibility content produced for digital publishing.

The implementation of this specification in user agents enables authors to produce more accessible e-books, by conveying structural book constructs used by the digital publishing industry to assistive technologies. It does this by extending the Core Accessibility API Mappings 1.1 and the Accessible Name and Description: Computation and API Mappings 1.1 specifications for user agents. It provides Accessibility API Mapping guidance for the roles defined in the Digital Publish WAI-ARIA Module.

The DPub-AAM is part of the WAI-ARIA suite described in the WAI-ARIA Overview.