18 April 2013 The   Web Applications Working Group   has published a W3C Recommendation of   XML Digital Signatures for Widgets . This document defines a profile of the XML Signature Syntax and Processing specification to allow a widget package to be digitally signed. Authors and distributors can digitally sign a widget as a mechanism to ensure continuity of authorship and distributorship. A user agent, or other validation system, can use a digital signature to verify the data integrity of the files within a widget package and to confirm the signing key(s). Learn more about the   Rich Web Client Activity .

The Web Applications Working Group published three Proposed Recommendations : The 'view-mode' Media Feature , which defines a media feature to match the different visual presentation modes that can be applied to web applications and thereby apply different styling based on these different modes using CSS Media Queries. Widget Packaging and XML Configuration , which standardizes a packaging format and metadata for a class of software known as widgets. Unlike traditional user interface widgets (e.g., buttons, input boxes, toolbars, etc.), widgets as specified in this document are full-fledged client-side applications that are authored using technologies such as HTML and then packaged for distribution. XML Digital Signatures for Widgets , which defines a profile of the XML Signature Syntax and Processing 1.1 specification to allow a widget package to be digitally signed. Authors and distributors can digitally sign a widget as a mechanism to ensure continuity of author...