## Internal Concepts
-The core of Rhynodge comprises ``Reaction``s which in turn consist of ``Query``s, ``Filter``s, ``Trigger``s, and ``Action``s.
+The core of Rhynodge comprises ``Reaction``s which in turn consist of ``Query``s, ``Filter``s, ``Merger``s, and ``Action``s.
### Query
The result of a ``Filter`` is a ``State``, again.
-### Trigger
+### Merger
-A trigger decides if, given the current state and the previous state, a noteworthy change has occured. It could calculate the difference between two file lists, or of two Facebook post lists.
+A merger merges two states into a new state; the new state is responsible for detecting whether a noteworthy change has occured.
-The result of a ``Trigger`` is an ``Output``.
+The result of a ``Merger`` is — once again — a ``State``.
### Watcher
-A watcher combines a query, a list of filters, and a trigger into a single unit which can be configured a lot easier than the separate components. For example, you could have a “Twitter” that finds new status updates for a username and that only needs to be configured with that username; the rest of the configuration is contained in the watcher.
+A watcher combines a query, a list of filters, and a merger into a single unit which can be configured a lot easier than the separate components. For example, you could have a “Twitter” that finds new status updates for a username and that only needs to be configured with that username; the rest of the configuration is contained in the watcher.
-A ``Watcher`` does not do any processing but instead offers a ``Query``, a list of ``Filter``s, and a ``Trigger``.
+A ``Watcher`` does not do any processing but instead offers a ``Query``, a list of ``Filter``s, and a ``Merger``.
### Action
-If a trigger found a change, the action is then executed. Again, an action can be almost anything: it can send an email, it can execute programs, print documents, initiate phone calls, take a picture from a webcam — anything you can program can be used an an action.
+If a noteworthy change has been detected, the action is then executed. Again, an action can be almost anything: it can send an email, it can execute programs, print documents, initiate phone calls, take a picture from a webcam — anything you can program can be used an an action.