Read this: D-Book 7 published

Summary: D-Book 7 is the product of 18 months of industry collaboration between manufacturers, service providers and technology companies. D-Book 7 is divided into two parts Part A, the broadcast specification, enhances the current D-Book 6.2.1 in a number of ways. This release is yet to include a device profile and some sections are under review, mainly due to awaiting the completion of international standardisation work. - dtg.org.uk