dfdl:choiceDispatchKey="{ sdf:replace(xs:string(header/MessageIdentifier../MessageTextFormatIdentifier), ' ', '_') }"

dfdl:outputValueCalc="{ mhdf:convert_to_hae(
	xs:int(../land_point_track_initial_word/composite_elevation/raw), 
	xs:int(../land_point_track_continuation_word_3/hae_adjustment/raw), 
	xs:float(../land_point_track_initial_word/composite_elevation/scaling_factor)) }"