Open Data is a new kid on the journalism block. In 2011 president Obama decided that thousands of data sets of the government could be opened up to scrutiny by the public; (data)journalists, policymakers and businesses. This is the beginning of the open data movement. The new openness aimed at creating more transparency, enhancing efficiency, creating business opportunities.
After the US, European countries joined the open data movement. Let’s take an example. You are filling in your tax form, but you face a problem. There is a service: make a call to the taxation office. But how long would be the waiting time? The service of the taxation office publishes its data: topics of questions, waiting time etc. Analysis of these data could improve efficiency of this service, or diminish mistake in tax forms. Journalists could write a story about wait-times at this service.