Figure 15 illustrates an overview of ISA-95 OPC UA Information Model. This overview is not complete, additional figures in later section will provide additional details of the information model. ISA-95 Base Information Model defines all models that are commonly utilized in this standard. This model includes a data representation model that is based on UN/CEFACT Core Data Type (CDT) (see UN/ECE). ISA-95 Common Object Model defines the models that represent all ISA95Resources and relationship between them.