+(defcustom notmuch-search-hide-excluded t
+ "Hide mail tagged with a excluded tag.
+
+Excluded tags are defined in the users configuration file under
+the search section. When this variable is true, any mail with
+such a tag will not be shown in the search output."
+ :type 'boolean
+ :group 'notmuch-search)
+(make-variable-buffer-local 'notmuch-search-hide-excluded)
+