That's core CouchDB.
On 18 August 2011 21:46, Jens Alfke <[email protected]> wrote: > > On Aug 18, 2011, at 1:41 PM, John Cheng wrote: > > Does anyone know if this is unique to couchbase? > > The If-Match: / If-None-Match: / ETag: headers, and the algorithm for > rejecting conflicting updates by comparing eTags, are fundamental parts of > HTTP 1.1. And they’re used by a lot of REST APIs, like the Atom Publishing > Protocol, and by WebDAV. > > —Jens >
