Domain
Domains are the components of the Analysis of Application realm. The top level domain is called the application domain of which there can be more than one.
![](images/DBD0001.gif)
Bridge
Bridges are the interfaces between domains.
![](images/DBD0002.gif)
Domain and Bridge Example
In a project the application domain is shown with all the other domains in the application. Bridges to other domains are effectively "channels" that a domain sends events to and receives event from.
![](images/PetrolStation01DBD002Domains.gif)
Domains with Central Entities Displayed Example
It is often useful to name the major entities comprising a domain and to have them visible on the DBD. The domain entities shown are usally the central and active entities.
![](images/PetrolStation01DBD003Full.gif)
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