BackgroundThe open access publishing model led to dramatic changes in the way scientists communicate their results. Open access also challenged the traditional business models of academic publishers that have been maintained for hundreds of years. Open access to article content, however, soon appeared insufficient as far as access to underlying data was concerned. Opening research data came as the logical second stage of this challenge which was soon put on the agenda of scientific communities, funding organisations and governments. Open data, by itself, raised the question how we can re-use data and reproduce research results, how transparent is the peer-review and, more generally, how scientific evaluation is being performed. Over time, these and other similar developments morphed into what we now call "open science" or, in more general terms, transforming research into a primarily collaborative rather than a primarily competitive endeavour.