Tomi Ollila <tomi.ollila@iki.fi> writes: > $ notmuch metadata uuid > $ notmuch metadata lastmod > $ notmuch metadata uuid lastmod > $ notmuch metadata lastmod uuid > > Now we can bikeshed whether this is good idea -- it seems OK. We will have some set of 'fake' metadata keys that are not actually stored in xapian metadata. Perversely this includes both lastmod and uuid > and what to do (and when) > if unknown key is used in request... Error out, I'd say, but if it's not one of our fake metadata items we can in general just ask xapian for that value of that metadata, and complain if it doesn't exist.