IMO REFERENCE DATA MODEL

There are different types of data model representations (hierarchical, relational, network data model types). The IMO Reference Model is a hierarchical data model which organizes data in a tree-like structure and supports one-to-many relationships between entities. The Unified Modelling Language (UML) language is used to visually represent the entity relationships. 

UML class diagram

The UML class diagram shows the structure and relationships between the data elements and classes

.1    Individual attributes (data elements) always have the optional cardinality 0 to 1 (0…1);
.2    In the UML class diagram, the class names are shown in red, and their attribute (data element) names are shown in green.  The relationship between classes can be 0 to 1 (0…1) or 0 to many (0…*).