This part of ISO 15531 specifies the full description of the conceptual model for resources usage management data, based on the resource information model and basic principles described in ISO 15531-31. The following are within the scope of this part 32 of ISO 15531: ? The description of the conceptual resource information model and related definitions for resource usage management data; ? The EXPRESS description of the model and related entities; ? The EXPRESS-G diagram of the model.