Not yet, because I have no access to a Typo3-site where I could try it out.
I would be happy to try it out on a Typo3 CMS too if it works in reality, because Wordpress did some weird modifications to content users paste in.
We use OpenStreetMaps 'wheelchair'-scheme for that information (in the same way as WheelMap does. We can display the wheelchair toilet information or description text from OpenStreetMap too.
Using the information on cbf-muenchen.de is more complicated, we have to contact them if we are allowed to use their descriptions. Or we just set a link to their sites for every poi, e.g. with "wheelchair:description:url". In any case, someone have to manually set the links for each POI in OSM to the respective site on cbf-muenchen.de.
But it would be a good example of a basic Linked Data approach!