Repositories
A Repository in Continua is simply a wrapper around an external repository which provides a way for Continua to interact with that repository. Adding a repository to Continua allows the user to make use of that repositories' content in other parts of Continua. For example, adding a repository and assigning it to a Configuration allows that Configuration to use the content in Stages & Actions. Once a repository has been assigned to a Configuration, its change sets are tracked and displayed on various pages. All change sets for a Configuration's repository will be shown on the Configurations change set page. All change sets that trigger a build or were last added since the previous build will be shown on the build's change set page. You also have the ability to see your own change sets if you've linked your Continua account to your repositories' account via the My Changes setting. When configuring a repository, you also have the ability to link it to an Issue Connectors which basically allows you to link certain repository check-ins to an issue in your issue tracking system.
(Something about Global, Project, Config repos????)
Triggers
A Trigger is a Continua feature that waits for certain events to occur, when they occur the Configuration the trigger is assigned to is executed. A trigger can be setup to execute the Configuration when a check in is made to a specified repository or at a certain period in time.