Privacy Policy

The datagnan project - in the following referred to as "datagnan" or simply "we" - respects your privacy and is committed to protect it in compliance with the privacy policy stated below. This privacy policy describes the types of information that we may collect from you or that you may provide when you visit and use our website

In general, can be accessed and used without providing any personally-identifiable information. Whenever we collect personally-identifiable information about you (e.g. your name or your e-mail address), we will first ask for your consent and you can provide this information voluntarily or not. The collected information will never be forwarded to third parties without your explicit consent.

If you do not agree with our policies and practices, it is up to you not to use our website. By accessing or using, you agree to this privacy policy.

Content Delivery Networks (Google, MaxCDN)

To reduce loading times and required network bandwidth of our website we use content delivery networks (CDN) to deliver commonly used Javascript libraries and font sets. These artifacts are therefore served by third party providers and not by us. The set of artifacts includes:

The use of these artifacts is unauthenticated and does not require Cookies (cf. However, Google Inc. and MaxCDN may log all accesses to these artifacts, i.e. they may log your IP address, date and time of your access, your browser version, your operating system version, as well as the referrer URL.

Social Networks (Facebook, Twitter, Google Plus, LinkedIn)

To indicate popularity of individual blog posts, we show the number of shares for a selected set of social networks (Facebook, Twitter, Google+, and LinkedIn). These numbers are collected by our own servers periodically, i.e. no communication between your browser and these social networks takes place.

To assist you in sharing and recommending our blog posts, we provide so called share buttons for Twitter, Facebook, Google+ and LinkedIn. These buttons are plain links to these social networks and are activated only if you click on them. Upon clicking, a new window or browser tab is opened that re-directs you to the respective social network where you can confirm the share (or recommendation) action.

Commenting (Disqus)

Commenting of blog articles is provided through Disqus, a service operated by Big Head Labs, Inc., San Francisco, USA. Disqus is an interactive commenting system that enables users to write comments on all websites that employ Disqus using a single user profile only.  Our website allows registered Disqus users to comment on our blog articles, i.e., you need to be registered at Disqus either directly or indirectly through your Facebook, Twitter, Yahoo, or OpenID profile. More information about Disqus and how it works can be found on

Your data is processed and stored on systems operated by Disqus. The terms of use and privacy policy of Disqus can be found at and If you registered with Disqus using your Facebook, Twitter, Yahoo, or OpenID profile, data may be collected by these providers as well every time you access our blog. For an elaboration of the data collected by these providers we refer to the terms of use and privacy policies of the respective providers.

We reserve the right to delete inappropriate comments or comment spam.


Unless you have given your explicit consent, we use your e-mail address and optional information about yourself to send you our newsletter. To receive our newsletter it is sufficient to provide your e-mail address only. Additional optional information about yourself is merely used to personalize the newsletter.

At the end of each newsletter there is a link that will allow you to unsubscribe from the newsletter at any time. You can also unsubscribe at any time by entering your email address in the newsletter unsubscribe form.

Statistical evaluation of website visits (Piwik)

We use the open-source software Piwik to statistically evaluate the visits to and subsequently improve the usability of our website. The collected data is anonymized and stored on our own servers.  Your IP-address is anonymized by Piwik, i.e. the last segment of it is discarded. During your visit, tracking information is stored within cookies on your computer, which will be deleted as soon as you close your browser. In case the "Do-Not-Track" feature is supported by your browser and enabled in your browser settings, your visit will neither be tracked nor recorded.

The collected tracking data will not be forwarded to third parties - neither today nor in the future.


If you have questions or comments about our privacy policy, please send an e-mail to privacy(at)