Extensible select and enumeration types

and their elements in schema FILL_AREA_STYLE_XIM taking into account BASED_ON types


 constructive_element_select - EXTENSIBLE GENERIC_ENTITY SELECT
          axis2_placement
          curve
          point_select
          surface

 external_identification_item - EXTENSIBLE GENERIC_ENTITY SELECT
          trimmed_curve

 identification_item - EXTENSIBLE SELECT
          shape_representation

 versionable_item - EXTENSIBLE SELECT
          shape_representation