For statistical purposes and to improve our service, this website uses technology provided by the company Piwik, which evaluates and then deletes data. No other use is made of the data, and the data are not passed on to third parties. The webtracking tool Piwik uses cookies, which are text files that are stored on your computer, to help us analyse the use of the website. To this end, the use of information generated by the cookie (including your anonymized IP address) is transmitted to our server and stored. This function can be deactivated.

Every time you visit a page on and every time you download a file, information about the activity is processed and stored in a temporary protocol file. Before it is stored, each data set is rendered anonymous by altering the IP address.

The following information is stored for each page you view and each file you download:

  • Technical details of the browser used
  • Anonymous IP address
  • Date and time
  • Page opened/name of the file downloaded
  • Quantity of data transferred
  • Notification of whether viewing or download was successful

Temporary session cookies are used each time you view an individual page, to make navigation easier. Cookies are small text files that are stored locally in your browser cache. Session cookies do not include any personal data and expire at the end of each session.

Cancellation of data storage

You may at any time lodge an objection to the storage of your anonymously collected visitor data, so that these will no longer be collected in future.

Objection to data storage