CKAN A place to to discuss the CKAN open data portal software that is being used around the world. Open Definition The <strong><a href="http://opendefinition.org">Open Definition</a></strong> sets out principles that define “openness” in relation to data and content. This category is for questions or improvement ideas for the Open Definition. Open Data Handbook The <strong><a href="http://opendatahandbook.org">Open Data Handbook</a></strong> category is for discussions on translating, improving and contributing to the Open Data Handbook. Open Trials Open Trials will aggregate information from a wide variety of existing sources, and aims to provide a comprehensive picture of the data and documents on all trials conducted on medicines and other treatments around the world.