Documentation related to DFG Viewer

[stweil]

This issue is related to documentation which is offered by https://dfg-viewer.de/, but not part of the GitHub repository.

While reading the documentation, I noticed a number of issues and inconsistencies.

Example:

In SRU-ALTO-Anwendungsprofil_1.0.pdf there is a mismatch between the description for dv:page (3 attributes: id, width, height) and the example (4 attributes: id, width, height, url). And there are typos like Elememente and several more.

It would be nice to have a repository for the documentation where issues and pull requests can be contributed.

[stweil]

@sebastian-meyer, I read the profile documentations because I tried to implement an SRU server. Are there any examples which work with the DFG Viewer? Meanwhile I managed to get a connection after debugging the code (see note). The special case with no search results also works, but if my server returns one or more results, nothing is shown in the viewer.

Update: results are shown if the SRU server uses the prefix "srw:" for all SRU tags. This should be fixed in the code, because the standard has no such requirement. Valid XML can have any prefix or no prefix at all.