FUNCTION item_in_context

(* SCHEMA representation_schema; *)

  FUNCTION item_in_context
    (item  : representation_item;
     cntxt : representation_context) : BOOLEAN;
    LOCAL
      y : BAG OF representation_item;
    END_LOCAL;
    -- If there is one or more representation using both the item
    -- and cntxt return true.
    IF SIZEOF(USEDIN(item,'REPRESENTATION_SCHEMA.REPRESENTATION.ITEMS')
      * cntxt.representations_in_context) > 0 THEN
      RETURN (TRUE);
      -- Determine the bag of representation_items that reference
      -- item
      ELSE y := QUERY(z <* USEDIN (item , '') |
             'REPRESENTATION_SCHEMA.REPRESENTATION_ITEM' IN TYPEOF(z));
        -- Ensure that the bag is not empty
        IF SIZEOF(y) > 0 THEN
        -- For each element in the bag
        REPEAT i := 1 TO HIINDEX(y);
          -- Check to see it is an item in the input cntxt.
          IF item_in_context(y[i], cntxt) THEN
            RETURN (TRUE);
          END_IF;
        END_REPEAT;
      END_IF;
    END_IF;
    -- Return false when all possible branches have been checked
    -- with no success.
    RETURN (FALSE);
  END_FUNCTION;

Referenced By

Defintion item_in_context is references by the following definitions:

Definition	Type
character_glyph_symbol	ENTITY
compatible_dimension	RULE
explicit_procedural_representation_item_relationship	ENTITY
presentation_size	ENTITY
representation_map	ENTITY
symbol_representation_with_blanking_box	ENTITY
table_record_field_representation_with_clipping_box	ENTITY

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2012-03-27T17:13:58-04:00