The HTML Working Group invites implementation of the Candidate Recommendation of W3C DOM4. DOM defines a platform-neutral model for events and node trees. Learn more about the HTML Activity.

The Tracking Protection Working Group has published a Working Draft of Tracking Compliance and Scope. This specification defines the meaning of a Do Not Track (DNT) preference and sets out practices for websites to comply with this preference. Learn more about the Privacy Activity.

The WebFonts Working Group has published a First Public Working Draft of WOFF File Format 2.0. Based on experience with WOFF 1.0, which is widely deployed, this specification provides improved compression and thus lower use of network bandwidth, while still allowing fast decompression even on mobile devices. This is achieved by combining a content-aware preprocessing step and improved entropy coding, compared to the Flate compression used in WOFF 1.0. Learn more about the Fonts Activity.

The Web Applications Working Group has published a First Public Working Draft of Service Workers. This specification describes a method that enables applications to take advantage of persistent background processing, including hooks to enable bootstrapping of web applications while offline. The core of this system is an event-driven Web Worker, which responds to events dispatched from documents and other sources. A system for managing installation, versions, and upgrades is provided. The Service Worker is a generic entry point for event-driven background processing in the Web Platform that is extensible by other specifications. Learn more about the Rich Web Client Activity.

The Efficient XML Interchange Working Group has published a Proposed Recommendation of Efficient XML Interchange (EXI) Profile for limiting usage of dynamic memory. This document describes a set of options that can be used to define profiles of the EXI 1.0 format suited to applications involving devices with dynamic memory constraints. Comments are welcome through 13 June 2014. Learn more about the Extensible Markup Language (XML) Activity.

The Cascading Style Sheets (CSS) Working Group has published a Last Call Working Draft of CSS Custom Properties for Cascading Variables Module Level 1. This module introduces cascading variables as a new primitive value type that is accepted by all CSS properties, and custom properties for defining them. CSS is a language for describing the rendering of structured documents (such as HTML and XML) on screen, on paper, in speech, etc. Comments are welcome through 3 June 2014. Learn more about the Style Activity.

The next W3C HTML5 online course is now open for registration. Acclaimed trainer Michel Buffa will cover in-depth techniques developers and designers need to create great Web pages and apps. This new course edition has been updated again, notably with sections dedicated to Web components and the Quota management API. As always, numerous interactive examples illustrate the course to help participants coding and making their assignments right. The course will start 9 June 2014, for 6 weeks. Register before 17 May to benefit from the early bird rate. Learn more about W3DevCampus, the official W3C online training for Web developers. See also our self-explanatory fun video.