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@@ -78,3 +78,31 @@ Das opticalSystem kann die gloable Position von Oberflächen besser bestimmen: B
 ### ClassWithOptimizableVariables / OptimizableVariable
 * Is there any possibility to simplify it (i.e. to use it like: `opt.AddVariable("blub", value=10.0); print(opt.blub)`)?
 
+## User interface
+These ideas should simplify the user-pyrate interaction. This means they should simplify the extraction of
+data from the optical system, the feed back of data into the system, and maybe in a distant future simplify
+the interaction with the FreeCAD interface. :-)
+
+### ExaminationClass
+
+* Gets data points from specific object (ExaminationClassAdaptor) and takes care of showing them in different ways
+* Different ways implemented by inheritance (TextfileExamination, PlotExamination, TableExamination)
+* Class may obtain inputs and feed it back into ExaminationClassAdaptor
+
+### ExaminationClassAdaptor
+
+* Interface class between certain class and ExaminationClass
+* Implementes methods:
+  * getDataPoints()
+  * setDataPoints()
+* Idea is to obtain data from or writing to a class without writing too much code into the class itself
+* This class implements the format of proper input and output (usually numpy arrays)
+* This class checks the proper input and output
+* Therefore depending on the ExaminationClass adapted to it, we can produce file output of several quantities,
+  plots (e.g. spot diagrams), tables for in- and output
+* Target classes maybe OpticalSystem, Surface, Material, all things the user should interfere with
+* if the user cannot feed the data back into the target class: do not implement setDataPoints()
+* if the user cannot aquire the data from the target class: do not implement getDataPoints()
+* inherit all functional adaptors from abstract base class
+
+