+@item
+The definition of LilyPond functions with
+@code{define-music-function}, @code{define-event-function},
+@code{define-scheme-function} and @code{define-void-function} no
+longer requires specification of @code{parser} and @code{location}
+arguments. Current parser and input location are part of the
+current dynamic state and can be accessed with the function calls
+@code{(*parser*)} and @code{(*location*)} when required.
+
+LilyPond makes a best-faith attempt of recognizing legacy use of
+@code{parser} and @code{location} arguments and will provide
+backwards-compatible semantics for some time.
+