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+Domain Model
+============
+
+The domain model resembles the structure of our system as objects. It is build by the parser and is the input into the generator.
+
+It is important to understand the domain model as it is the main input for the template generation.
+
+The IDL is converted into an in memory domain model (see qface/idl/domain.py)
+
+.. code-block:: yaml
+
+    - System
+        - Module
+            - Import
+            - Service
+                - Property
+                - Operation
+                - Event
+            - Enum
+            - Flag
+            - Struct
+
+
+The domain model is the base for the code generation. You traverse the domain tree and trigger your own code generation.
+
+.. code-block:: python
+    from qface.generator import FileSystem
+
+    system = FileSystem.parse_dir('interfaces')
+
+    for module in sytem.modules:
+        print(module.name)
+
+        for interfaces in module.interfaces:
+            print(interfaces.name)
+
+        for struct in module.structs:
+            print(struct.name)
+
+
+Debug
+-----
+
+At any time you can place a debug breakpoint:
+
+.. code-block:: python
+
+    import ipdb; ipd.set_trace()
+
+
+See https://pypi.python.org/pypi/ipdb
+
+
+To see the object members just use:
+
+.. code-block:: python
+
+    dir(module) # list all members of module
+    help(module) # prints the documentation