The Timed Text Working Group has published a Working Draft of Timed Text Markup Language (TTML) 1.0 (Second Edition). This document specifies the Timed Text Markup Language (TTML) in terms of a vocabulary and semantics thereof. Learn more about the Video in the Web Activity.

The Web Performance Working Group has published the First Public Working Draft of Navigation Timing 2. This specification defines a unified interface to store and retrieve high resolution performance metric data related to the navigation of a document. Learn more about the Rich Web Client Activity.

The Linked Data Platform (LDP) Working Group has published the First Public Working Draft of Linked Data Platform Use Cases and Requirements. A set of user stories, use cases, scenarios and requirements that motivate a simple read-write Linked Data architecture, based on HTTP access to web resources that describe their state using RDF. Learn more about the Semantic Web Activity.

The SPARQL Working Group has published today a set of three documents, advancing most of SPARQL 1.1 to Proposed Recommendation. This publication completes the set of Proposed Recommendations for SPARQL 1.1, after the first series published in November 2012. Building on the success of SPARQL 1.0, SPARQL 1.1 is a full-featured standard system for working with RDF data, including a query/update language, two HTTP protocols (one full-featured, one using basic HTTP verbs), three result formats, and other features which allow SPARQL endpoints to be combined and work together. Most features of SPARQL 1.1 have already been implemented by a range of SPARQL suppliers, as shown in our table of implementations and test results.

The three Proposed Recommendations published today are:

• SPARQL 1.1 Entailment Regimes - defines the semantics of SPARQL queries under entailment regimes such as RDF Schema, OWL, or RIF.
• SPARQL 1.1 Protocol for RDF - A protocol defining means for conveying arbitrary SPARQL queries and update requests to a SPARQL service.
• SPARQL 1.1 Graph Store HTTP Protocol - As opposed to the full SPARQL protocol, this specification defines minimal means for managing RDF graph content directly via common HTTP operations.

Learn more about the Semantic Web and the Semantic Web Activity.

The Web Applications Working Group and the Web Application Security Working Group have published a Candidate Recommendation of Cross-Origin Resource Sharing. This document defines a mechanism to enable client-side cross-origin requests. Specifications that enable an API to make cross-origin requests to resources can use the algorithms defined by this specification. If such an API is used on http://example.org resources, a resource on http://hello-world.example can opt in using the mechanism described by this specification (e.g., specifying Access-Control-Allow-Origin: http://example.org as response header), which would allow that resource to be fetched cross-origin from http://example.org. Learn more about the Rich Web Client Activity and the Security Activity.

The Audio Working Group has published a Group Note of Web Audio Processing: Use Cases and Requirements. This document introduces a series of scenarios and a list of requirements guiding the work of the W3C Audio Working Group in its development of a web API for processing and synthesis of audio on the Web. Learn more about the Rich Web Client Activity.

The HTML Working Group has published the First Public Working Draft of Media Source Extensions. This specification extends HTMLMediaElement to allow JavaScript to generate media streams for playback. Allowing JavaScript to generate streams facilitates a variety of use cases like adaptive streaming and time shifting live streams. Learn more about the HTML Activity.

The W3C is organizing the second W3Conf: Practical Standards for Web Professionals on February 21-22 at The Regency Center in San Francisco. This is an opportunity to attend the developer conference organized by the makers of HTML, CSS, SVG and many other standards that are the foundation of today's and tomorrow's Open Web Platform. Come and hear from an outstanding list of speakers and get a chance to meet a lot of the W3C experts in person. Register using the "w3c" promo code to get $100 off the early-bird price.