State maintains the start position and length (in bits) of every element in the infoset

[nlewis05]

Have a parse that would read the richer infoset representation that exposes this information for use by the GUI opposed to dumping the xml

[lrbarber]

This could be an extra data view in the data editor that shows the current bit location of the parser in addition to the way it currently shows the current byte.
Alternatively, this information could be added to the output infoset with each item added. This would pollute the data file with extra information that would prevent any attempt to unparse, but could help diagnose issues with the schema not having the correct bit length/position.