Method: CONSTRUCTOR
Method: GET_PROPERTIES
Method: QDEF_UID_TEXT_GET
Method: GET_CAPTION
Method: QDEF_CONSTRUCT
Method: GET_AGGREGATOR
Method: GET_TECHNM
Method: GET_S_EXPLAIN
Method: ADD_BNR_PROPERTIES
Method: CREATE_ITEM_BY_QUELL
Method: CREATE_ITEM_BY_CELL
Method: EXPLAIN_QUERY_SET