Data contract (MS) §

= the format of the data communicated in an event

Used by §

• Producer service (MS)
• Consumer service (MS)

Components §

• Data definition (= what will be produced = e.g. fields, types…)
• Trigggering logic (= why it is prodcued = e.g. which business logic)

Rules §

• backwards & forwards compatible

Consumption §

• Code generator to turn event data into objects and vice versa