Governments open their books

A quiet revolution in how we access government data is helping us do everything from catch buses to save money for the NHS. Simon Wilson investigates.

What is open data?

“Open data is data that can be freely used, reused and redistributed by anyone – subject only, at most, to the requirement to attribute and share alike,” according to the Open Definition, a set of principles created by key players in the open data movement.

For data to be open, there are three main elements. 'Availability and access' means that it must be freely available in a [...]

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