inputPackFormatIDRef
(Matrix) Reference to a channel-based (DirectSpeakers) input audioPackFormat
(element name) element is present (extra spec name if needed) (Dolby Atmos Master ADM Profile addition)
(subelement name) subelement count (subelement count) is not permitted, (min or max) is (max count) (extra spec name if needed) (Dolby Atmos Master ADM Profile addition)
(element name) value (element value) shall match the (target attribue name) attribute of a(target element name) element