location_alt 999 l
library 949 m
library_alt 999 m
-note 949 o multi
-note_alt 999 o multi
+note 949 o m:multi
+note_alt 999 o m:multi m:req
type 949 t
type_alt 999 t
-date_a 949 v
+date_a 949 v m:foo m:bar f:baz m:quux
date_a_alt 999 v
date_b 949 u
date_b_alt 999 u