To make this site work properly, we sometimes place small data files called cookies on your device. Most big websites do this too.

What are cookies?

A cookie is a small text file that a website saves on your computer or mobile device when you visit the site. It enables the website to remember your actions and preferences (such as login, language, font size and other display preferences) over a period of time, so you don’t have to keep re-entering them whenever you come back to the site or browse from one page to another.

How do we use cookies?

We use cookies to make our website more user-friendly. Some elements of our website require that the calling browser can be identified even after a page change. The following data is stored and transmitted in the cookies: Language settings, log-in information.
We also use cookies on our website, which enable us to analyse the surfing behaviour of our users. In this way, the following data can be transmitted: Search terms entered, frequency of page views, use of website functions.
We do not use the personal data collected by technically necessary cookies for creating a user profile. We use cookies for analysing purposes in order to improve the quality of our website and its contents. We learn how our website is used and are able to optimise our website continuously (see also chapter VII Web analysis using Google Analytics). Those purposes justify our legitimate interest of processing data according to Article 6 paragraph 1 lit. f GDPR.

How to control cookies

You can control and/or delete cookies as you wish – for details, see You can delete all cookies that are already on your computer and you can set most browsers to prevent them from being placed. If you do this, however, you may have to manually adjust some preferences every time you visit a site and some services and functionalities may not work.