To me, government transparency is reducing the gaps between what government “designs”, and the “reality” of which it is. It provides the public information on the “evaluation” and “measurement” – which in turns may then provide accountability for public servants.
I see it as though there are multiple types of transparencies – publications that are produced, the transactions that take place, reporting these things to the public and/or other government officials, providing a sense of openess (details on the performance), as well as providing a sense of accountability (the performance information – reward or punishment).
Within this “government transparency” there is of course, lots of data – financial, procurement, workflow (activities and resources), and registration to record the particular details with the public sector. Everything recorded, and disseminated to the public via news media outlets, government websites and reports, etc. etc.