This document discusses open data culture from the perspective of civic hackers. It defines open data as content that anyone can freely use, modify, and share subject only to attribution and share-alike requirements. It notes that open data has weak legal aspects and should focus on technological neutrality and improving reuse through good documentation for both humans and machines. Open data is described not as an object but as a way of working and a philosophy of life that overturns traditional views and enables bottom-up contributions from anyone in the community.