There are no two ways about it—creating a barrier-free website with TYPO3 requires a huge effort. HTML tables, in particular, are difficult to adapt to barrier freedom. We are not going to discuss the foundations of barrier-free web designs and their advantages here. You can stay informed about current developments and specifications of current developments and trends on the pages of the Web Accessibility Initiative (WAI) that was founded by W3C. The W3C has defined a list of the items to be checked with regard to accessibility for web content and the measures that are necessary to make web content barrier free. A few of the aspects that are especially important when working with TYPO3 are detailed in the following list:
Content and layout should be separated using CSS formatting.
Navigation through pages should be possible using both mouse and keyboard.
Table layouts should be avoided.
Data tables should have structured elements.
Graphics should be augmented with...