DESI-III uses a real database for the organisation of the drawings and drawing entities: which allows to use any stored drawing as a symbol in any other drawing. DESI-III supports many different entities (drawing elements): Lines, texts, symbols, polygons, circular and elliptical arcs, segments and sectors, rectangles, triangles, curves and dimensions are taking one record in the database, associative hatching, text entities, associative text attributes, user definable line patterns, macro-symbols (parameterized drawing entities) and also can be defined construction points.