Of course we welcome any contribution to make our knowledge graphs more accurate and complete.
Any input will therefore be accepted in gratitude.
At the same time, however, we want to achieve and maintain the highest achievable data quality standards. For this reason we will only allow ‘editors”, who are certified professionals, to add or amend data directly in the underlying database. 
If you want to contribute as a professional to our knowledge graphs, please fill out the short application form below.

Thank you!