Andrew Nicklin

The best definition that I have seen is here: http://wiki.opengovdata.org/index.php?title=OpenDataPrinciples. In theory it is possible to devise measurements against each of these 8 criteria which then allows you to measure your success in becoming transparent. It also doesn’t mean you have to achieve all 8.

As if that wasn’t general enough, I’d go even wider than that and say that the first step is to not just think of it as a noun (a defined objective) and start thinking of it as a verb (a process).