diff --git a/README.md b/README.md
index 14470ab..393195e 100644
--- a/README.md
+++ b/README.md
@@ -1,10 +1,10 @@
 # CourseBuilder
 
-Coursebuilder is a helper and validator for curricula. It helps to amalgate and validate curricula descriptions in order to generate legally required documents for university courses. 
 
-# Author
-
-(c) Copyright 2020-2023 Hartmut Seichter
+Coursebuilder is a preprocessor tool for [pandoc](https://pandoc.org) 
+to generate multi-lingual curricula documentation tables from 
+structured representations as a flatfile database. Data scheme and 
+actual values are kept in YAML files in order to version them with git.
 
 # Usage
 
@@ -23,6 +23,11 @@ options:
                         using provided schema
 ```
 
+# Author
+
+(c) Copyright 2020-2023 Hartmut Seichter
+
+
 
 # Licence
 
diff --git a/test/simple/mod.cg.yaml b/test/simple/mod.cg.yaml
index 91353be..16fd81e 100644
--- a/test/simple/mod.cg.yaml
+++ b/test/simple/mod.cg.yaml
@@ -3,28 +3,18 @@ name: {
   en: "Computer Graphics"
 }
 
+id:
+  value: CG
+
 credits: 
   value: 5
 
-# common 
-common:
-  id: CG  # fix for any variante
-  instructor: Prof. Hartmut Seichter, PhD
-  credits: 5 # numerical value
-  term: winter # winter, summer, both
-  frequency: once_per_year, once_per_term
-  duration: 1 # 1=one term
-  kind: comp #compulsory, elective 
-  workload: |
-    - Vorlesung 2SWS
-    - Übung 2SWS
-    - Workload: Präsenz (Vorlesung + Übung) 120h Prüfungsvorbereitung 30h
-  author-of-indenture:
-  form: lecture # lecture, seminar, lecture_seminar, lecture_exersice, project
-
 form-of-exam: 
   value: written
 
+form:
+  value: lecture
+
 kind: 
   value: compulsory
 
@@ -83,7 +73,7 @@ media-of-instruction:
     * Folien
     * Auszug aus der Literaturliste:
       * Bar-Zeev, Avi. Scenegraphs: Past, Present and Future, 2003 http://www.realityprime.com/scenegraph.php
-      * Burley, Brent. “Physically-Based Shading at Disney.” In ACM SIGGRAPH, 2012:1-7, 2012
+      * Burley, Brent. “Physically-Based Shading at Disney.” In ACM SIGGRAPH, 2012:1--7, 2012
       * Goldstein, E. Bruce. Sensation and Perception. 3rd ed. Belmont, Calif.: Wadsworth Pub. Co., 1989
       * Hughes, John F. Computer Graphics: Principles and Practice. Third edition. Upper Saddle River, New Jersey: Addison-Wesley, 2014
       * Shirley, Peter, and R. Keith Morley. Realistic Ray Tracing. 2. ed. Natick, Mass: A K Peters, 2003
@@ -94,84 +84,7 @@ media-of-instruction:
     * slides and quizzes
     * Literature:
       * Bar-Zeev, Avi. Scenegraphs: Past, Present and Future, 2003 http://www.realityprime.com/scenegraph.php.
-      * Burley, Brent. “Physically-Based Shading at Disney.” In ACM SIGGRAPH, 2012:1–7, 2012
+      * Burley, Brent. “Physically-Based Shading at Disney.” In ACM SIGGRAPH, 2012:1--7, 2012
       * Goldstein, E. Bruce. Sensation and Perception. 3rd ed. Belmont, Calif.: Wadsworth Pub. Co., 1989
       * Hughes, John F. Computer Graphics: Principles and Practice. Third edition. Upper Saddle River, New Jersey: Addison-Wesley, 2014
       * Shirley, Peter, and R. Keith Morley. Realistic Ray Tracing. 2. ed. Natick, Mass: A K Peters, 2003
-
-
-# German Variant
-de:
-  name: Computergrafik
-  goal:
-    Computergrafik ist ein Schmelztiegel von Technologien in der Informatik mit dem Ziel visuelle 
-    Inhalte effizient zu generieren und dem Nutzer zu präsentieren. Studierende können den 
-    Zusammenhang von visuellen Technologien in der Informatik, den zugrunde liegenden mathematischen
-    Konzepte und der Physiognomie des Menschen, insbesondere des Sehapparates herstellen. 
-    Sie können die Eigenschaften verschiedener Darstellungsformen und -techniken analysieren und 
-    bewerten. Sie lernen grundsätzliche Technologien der 3D Echtzeitdarstellung
-    kennen und wenden diese an.
-  content: |
-     * Grundkenntnisse der menschlichen Wahrnehmung 
-     * Grundkonzepte der Bilderzeugung, Speicherung und Transformation
-     * Anwendungen von Computergrafik
-     * Technologien zur Bilddarstellung 
-     * 3D Modelle, insbesondere Surface- und Volumemodelle 
-     * Transformationspipeline 
-     * Homogene Vektorräume und Transformationen 
-     * Szenengraphen und Echtzeit Rendering APIs 
-     * Bildsyntheseverfahren
-     * Geometrie und Bild Samplingverfahren und Anti-Aliasing Strategien 
-     * Lichttransport, Physikalische Beleuchtungsmodelle 
-     * Texturierungsverfahren 
-     * Überblick Visualisierung 
-     * Graphische Nutzeroberflächen und Systeme
-  prerequisites: Lineare Algebra, Englisch Kenntnisse min. IELTS Score 6.0
-  media-of-instruction: |
-    * H5P Lernmodule 
-    * Lernforum
-    * Übungen
-    * Folien
-    * Auszug aus der Literaturliste:
-      * Bar-Zeev, Avi. Scenegraphs: Past, Present and Future, 2003 http://www.realityprime.com/scenegraph.php
-      * Burley, Brent. “Physically-Based Shading at Disney.” In ACM SIGGRAPH, 2012:1-7, 2012
-      * Goldstein, E. Bruce. Sensation and Perception. 3rd ed. Belmont, Calif.: Wadsworth Pub. Co., 1989
-      * Hughes, John F. Computer Graphics: Principles and Practice. Third edition. Upper Saddle River, New Jersey: Addison-Wesley, 2014
-      * Shirley, Peter, and R. Keith Morley. Realistic Ray Tracing. 2. ed. Natick, Mass: A K Peters, 2003
-
-# English
-en:
-  name: Computer Graphics
-  goal: | 
-    Computer graphics is describing all techniques in computer science
-    generating images perceivable by humans. Participants will have a broad
-    overview of techniques and concepts of computer graphics. They will be 
-    able to apply theoretical concepts in practice. 
-  content: |
-     * Basics of human perception 
-     * Concepts of image storage and manipulation 
-     * Applications of computer graphics
-     * Display sytems
-     * 3D models,i.e. surface and volume models 
-     * Transformationspipeline 
-     * Homogenous vector spaces and transformations 
-     * Scenegraphs and rendering APIs
-     * Methods for image-synthesis
-     * Sampling in computer graphics 
-     * Light transport and shading models 
-     * Texturing
-     * Overview visualizations 
-     * Graphical User Interfaces
-  prerequisites: linear algebra, min. level IELTS score 6.0
-  media-of-instruction: |
-    * H5P learning modules 
-    * learning forum
-    * exersises
-    * slides and quizzes
-    * Literature:
-      * Bar-Zeev, Avi. Scenegraphs: Past, Present and Future, 2003 http://www.realityprime.com/scenegraph.php.
-      * Burley, Brent. “Physically-Based Shading at Disney.” In ACM SIGGRAPH, 2012:1–7, 2012
-      * Goldstein, E. Bruce. Sensation and Perception. 3rd ed. Belmont, Calif.: Wadsworth Pub. Co., 1989
-      * Hughes, John F. Computer Graphics: Principles and Practice. Third edition. Upper Saddle River, New Jersey: Addison-Wesley, 2014
-      * Shirley, Peter, and R. Keith Morley. Realistic Ray Tracing. 2. ed. Natick, Mass: A K Peters, 2003
-