anchor.diff:  observe_search_query(#search_query{}, _Context) ->
       undefined.
   
  +%% @doc Boost primary identifier
  +observe_elasticsearch_fields(#elasticsearch_fields{query = _Query}, Fields, _Context) ->
  +    [
  +        <<"dcterms:identifier^2">>, %% object number
  +        <<"priref^2">>
  +    | Fields].
   
   observe_acl_is_allowed(
       #acl_is_allowed{
  
positive.code:     Index = mod_ginger_adlib_elasticsearch:index(Context),
      Mapping = beeldenzoeker_elasticsearch_mapping:default_mapping(),
      
      %% Update all types that are currently enabled
      [{ok, _} = erlastic_search:put_mapping(Index, Type, Mapping) || Type
          <- mod_ginger_adlib_elasticsearch:types(Context)],
      ok.
  
negative.code:     init/1,
      manage_schema/2,
      observe_search_query/2,
      observe_acl_is_allowed/2,
      observe_elasticsearch_fields/3
  ]).
  
  %% @doc Linked data property mappings
  