Multi-node replication for webdav would be done at the file system level (eg: gfs or whatnot). By query options, to you mean some kind of join, for example? Obviously anything beyond plain id-based get/set (by file path/url) isn't possible with "just" webdav. But if you already limit yourself to looking at single documents (ie: json-files) -- you could always fetch doc1, find the id/path of doc2 in doc1 and fetch that. I'm not saying this sounds like a sane db strategy, I'm just not convinced doing the same thing, with a little easier api sounds like a sane strategy either?