+
+ The <b>lastmod:</b> prefix can be used to restrict the result by the database
+ revision number of when messages were last modified (tags were
+ added/removed or filenames changed). This is usually used in conjunc‐
+ tion with the <b>--uuid</b> argument to <b>notmuch</b> <b>search</b> to find messages that
+ have changed since an earlier query.
+
+ The <b>query:</b> prefix allows queries to refer to previously saved queries
+ added with <a href='../notmuch-config-1/'>notmuch-config</a>(1). Named queries are only available if not‐
+ much is built with <b>Xapian</b> <b>Field</b> <b>Processors</b> (see below).
+
+ The <b>property:</b> prefix searches for messages with a particular
+ <key>=<value> property pair. Properties are used internally by notmuch
+ (and extensions) to add metadata to messages. A given key can be
+ present on a given message with several different values.