Check IIIF-URLs behaviour

[riedde]

In a discussion about mei metadata and image urls I got a hint about the use of IIIF- URLs

This should be reflected and documented!

[bwbohl]

I don't think that we would have to document this in the context of Edirom-Online, but at least make sure we expect the right thing and maybe point out the MEI documentation. Does that sound plausible?

[riedde]

Yes. For me it was new and I noticed that I sometimes use this in a false way. If both works it is okay for me I thought that we just document it if a special way of use is required because of the openseadragon implementation in the edirom

[bwbohl]

We should definitely assure the media fragment syntax works an if needed translate it to the Image API syntax.