in a move that reinforces the close relationship between the drawings and specification, the code combines the original drawing and specification documents into a single guide. this has been extended to cover use of cad and to take into account the use of schedules of work. it provides pragmatic guidance on use of drawings, specifications and schedules of work and the methods used to co-ordinate the information contained within. key themes that appear in the code are standardisation, information re-use and information management.