Resolve "Inherited components of a type can not be chosen as port targets"

Closes #59 (closed)

pages/docs/compiler.md

@@ -75,8 +75,9 @@ However, depending on the selected protocols and/or used features, additional de
 - Required runtime dependencies: _none_
 - Required options for RelAST compiler: _none_
 - Required options for JastAdd:
-    - `--incremental`
-    - `--tracing=flush`
+    - `--incremental=param` (enable incremental evaluation)
+    - `--tracing=flush` (enable tracing of events)
+    - `--cache=all` (set all attributes to be cached)
 - Remarks:
     - Other (additional) values passed to those two options must be equal (e.g., `--incremental=param` passed to RagConnect must be also passed to JastAdd)
     - Other values besides `flush` can be added to `--tracing`