... different kinds of OPACs from different vendors, it is compatible with more libraries than any other app.
So far VideLibri has been tested with 200 libraries in Germany/Austria/Switzerland successfully, but it was designed to allow any user to add their own library without requiring any/much programming knowledge. For this any URL of any webpage can be entered in VideLibri together with an arbitrary query.
The spin-off cli-tool Xidel can run these queries on any non-library webpage.