> <device_info/> -- Information relating to the tablet as precised by the manufacturer.
[?] <trace_format/> -- Format of a trace listing channels used and tablet orientation.
[+] <data_block/> -- Block grouping several traces having same trace_context.
[?] <wanda_link/> -- Element that will be replaced by the file it points to.
[*] <meta/> -- Information about how the document annotations were generated.
[?]
