delta_aggregate ::= record_delta_aggregate | array_delta_aggregate

record_delta_aggregate ::=
  ( base_expression with delta record_subcomponent_association_list )

record_subcomponent_association_list ::=
  record_subcomponent_association {, record_subcomponent_association}

record_subcomponent_association ::=
  record_subcomponent_choice_list => expression

record_subcomponent_choice_list ::=
  record_subcomponent_choice {'|' record_subcomponent_choice}

record_subcomponent_choice ::=
    component_selector_name
  | record_subcomponent_choice (expression)
  | record_subcomponent_choice . component_selector_name

array_delta_aggregate ::=
    ( base_expression with delta array_component_association_list )
  | '[' base_expression with delta array_component_association_list ']'
  | ( base_expression with delta array_subcomponent_association_list )
  | '[' base_expression with delta array_subcomponent_association_list ']'

array_subcomponent_association_list ::=
  array_subcomponent_association {, array_subcomponent_association}

array_subcomponent_association ::=
  array_subcomponent_choice_list => expression

array_subcomponent_choice_list ::=
  array_subcomponent_choice {'|' array_subcomponent_choice}

array_subcomponent_choice ::=
    ( expression )
  | array_subcomponent_choice (expression)
  | array_subcomponent_choice . component_selector_name