Currently, JSPWiki has (in theory) support for DAV.
This is contained in the packages org.apache.wiki.dav, org.apache.wiki.dav.items and org.apache.wiki.dav.methods.
The code does not work properly and it's also very hard to get it working in the future.
But most important, the general sense is that it is not used much, or maybe not at all.
The proposal is to completely remove this stuff from the codebase.
There has been a call for an official ASF vote from 26-02-2009 + 72 hours , where we reached an agreement to remove the code.