Data is currently in the spotlight, be it open data or big data. It is important to consider these two types separately, even if they share a common object: data. Big data focuses primarily on the possibilities offered by exploiting a volume of data in exponential growth.
Whereas with open data, the creation of value depends on the ability to share data, to make it available to third parties, rather than on sheer volume. Open data responds to a set of technical, economic and legal criteria: it must be freely available online, under a format that allows re-use.