ATSC and CEA are developing standards that include the ability to download digital signed applications. Their current specifications reference the W3C Recommendation for XML Digital Signature for Widgets (18 April 2013). However, the associated Widgets Digital Signature Namespace (http://www.w3.org/ns/widgets-digsig/) contains a statement that "Implementers should be aware that this document is not stable." which has raised questions as to the stability and suitability of referencing Widget DigSig. The alternative would be to reference XAdES with the C and T forms to allow for the inclusion of timestamp and certificate revocation information which are not included in Widget DigSig.
I would be pleased to receive any information regarding the stability of Widget DigSig and whether referencing XAdES would provide a better alternative. Thank-you, Andrew Twigger