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Domain Behavior (Domain Modeling)

Overview​

Domain Modeling is the Mississippi area where aggregates, sagas, event effects, and UX projections are expressed.

It defines the domain-facing abstractions and runtime pieces that let application code focus on business rules instead of infrastructure plumbing.

Why This Area Exists​

Use Domain Modeling when you want Mississippi's domain-facing building blocks rather than the lower-level stream, reducer, or transport subsystems.

This is where application code expresses commands, aggregate behavior, sagas, effects, and UX projections in business terms.

Representative Packages​

  • Mississippi.DomainModeling.Abstractions
  • Mississippi.DomainModeling.Runtime
  • Mississippi.DomainModeling.Gateway
  • Mississippi.DomainModeling.TestHarness

What This Area Owns​

  • Aggregate command-handling abstractions and runtime support
  • Saga orchestration and compensation surfaces
  • Event-effect patterns attached to domain behavior
  • UX projection grain abstractions and runtime support

How It Fits Mississippi​

Domain Modeling sits above Brooks and Tributary.

It is the place where event streams and state reconstruction are turned into concrete domain behavior and projection-facing models.

Use This Section​

Start here when the question is about aggregates, sagas, effects, or UX projections rather than about the lower-level mechanics underneath them.

Current Coverage​

This section now includes typed boundary pages for getting started, concepts, package selection, reference, and troubleshooting.

They make the domain-facing boundary easier to navigate while deeper aggregate, saga, effect, and UX projection pages are still being written.

Learn More​