The Web Applications Working Group has published a Last Call Working Draft of DOM Parsing and Serialization. This specification defines various APIs for programmatic access to HTML and generic XML parsers by web applications for use in parsing and serializing DOM nodes. Comments are welcome through 22 May. Learn more about the Rich Web Client Activity.

Today the Timed Text Working Group (TT WG) published a First Public Working Draft of TTML Text and Image Profiles for Internet Media Subtitles and Captions 1.0. This document specifies two profiles of Timed Text Markup Language 1: a text-only profile and an image-only profile. These profiles are intended to be used across subtitle and caption delivery applications worldwide, thereby simplifying interoperability, consistent rendering and conversion to other subtitling and captioning formats. The text profile is a superset of TTML Simple Delivery Profile for Closed Captions (US). Learn more about Video on the Web.

The HTML Working Group updated the Candidate Recommendation of HTML5. This specification defines the 5th major revision of the core language of the World Wide Web: the Hypertext Markup Language (HTML). Learn more about the HTML Activity.

The Cascading Style Sheets (CSS) Working Group has published a First Public Working Draft of CSS Will Change Module Level 1. This document defines the will-change CSS property, which allows an author to inform the UA ahead of time of what kinds of changes they are likely to make to an element. This allows the UA to optimize how they handle the element ahead of time, performing potentially-expensive work preparing for an animation before the animation actually begins. Learn more about the Style Activity.