D. BIAN-ISO20022 Message Viewpoint

This diagram adds to the Message Viewpoint by showing the subclass relationships between the elements of the viewpoint and elements of the ISO20022 Metamodel.

Elements of the BIAN Metamodel are colored blue, while elements of the ISO20022 Metamodel are colored brown.

The choice of which ISO20022 elements should be extended rather than reused as-is is driven by analysis of which elements require the extra properties that the BIAN extensions inherit from BIANElement and TaggableElement.

Links Between Elements of the Message and Business Object Viewpoints

The ISO20022 Metamodel supports connections between elements of the Business Object and Message viewpoints. The BIAN elements of these two viewpoints inherit the connections among their ISO20022 ancestors.

An ISO20022 BusinessComponentTrace is a link that supports two cases: establishing traceability from a MessageComponent to a BusinessComponent, and establishing traceability from a MessageElement to a BusinessComponent. The latter case supports scenarios in which a single MessageElement may be all that is required to capture the information from a BusinessComponent that needs to be transmitted in a message. For example, while a BusinessComponent may contain multiple BusinessElements, in some scenarios only one of the BusinessElements may need to be transmitted in a message, in which case creating a full-blown MessageComponent would be overkill.

An ISO20022 BusinessElementTrace establishes traceability from a MessageElement to a BusinessElement.