Accessibility and Web Standards

It is our goal to make this website available to all users, regardless of technical capabilities and physical restrictions of individual users. For this reason, this website is completely in line with the web standards and accessibility recommendations of the World Wide Web Consortium (W3C).
Furthermore, the Regulation for creating barrier-free information technology in accordance with the Equal Opportunities for Disabled Persons Act (Barrier-free Information Technology Ordinance – BITV 2.0) was and is largely observed in compiling and maintaining of this website.

AccessKeys, keyboard navigation

Our website can be fully controlled with a keyboard, without the need of a mouse or input devices. This website supports AccessKeys. The key assignment follows the internationally used British Standard.

    1: Home page / Startseite
    3: Sitemap / Inhaltsübersicht
    4: Search / Suche
    5: Jump to top of page / Zum Anfang der Seite springen
    6: Jump to main content / Zum Seiteninhalt springen
    8: Imprint / Impressum
    9: Feedback / Kontakt
    0: Notes on accessibility (this site)

To use AccessKeys, press the following keys on your keyboard at the same time:

  • Firefox 15+ in Windows and Linux: “Alt” + “Shift” + AccessKey
  • Chrome 3+, Opera 15+ and Safari 4+ in Windows and Linux: “Alt” + AccessKey
  • Internet Explorer 10+ in Windows: “Alt” + AccessKey
  • Firefox 15+, Opera 15+, Chrome 3+ and Safari 4+ in MacOS 14.0.1.+: “Ctrl” + “Opt” + AccessKey

We recommend using the Tab key for easy site map accessibility and navigation.


All font sizes, spacing and basic distance values are defined in relative dimensions. You can adjust the font sizes above the header image by a mouse click (A- / A+). Furthermore, you can change the font size via the keyboard depending on the browser (e.g. Firefox: CTRL and + to enlarge, CTRL and – to reduce the size)

Page layout structure

HTML elements are used according to their semantics, so that you can read and navigate the site using screen readers without style sheets. The positioning of elements takes place mostly using DIV elements and CSS, additional tables are used only in a few cases. Empty / transparent graphics are not used at any point.

Graphic information

When charts and images are used for the mediation of information, they are accompanied by an alternative descriptive text. This does not apply to images used only as a decoration or for design purposes.

The use of browser-based scripting languages (JavaScript)

All information on this website is accessible without JavaScript. Javascript is used only in a few places and is merely a simplification of some features of this site, and is not a prerequisite.

Simplified / mobile version of the website

The simplified version of this site, single-column formatted and well displayed on mobile devices, rich in contrast and text-oriented, is available via “mobile version” at any time.