rdf-use-cases.md

 # Use cases für RDF
 
 ## Relations to be discussed and semantically correct named
+
+Described potential relations go in both directions and need to be named.
+
 ### Variables
-- source Variable is the same variable as in the target study (wave)
+- source variable is the same variable as in the target study (wave)
 - source variable is annotated by a controlled vocabulary(ies)
-- source Variable is connected to a question
 - source variable is derived by target variable(s)
 
 ### Question
-- source Question is in order next to the target question (Order within questionnaire)
+- source question is "in order" next to the target question (Order within questionnaire)
 - source question is annotated by a controlled vocabulary
 - source question is annotated by a construct (controlled vocabulary)
 
+### Variable & Question
+- source variable is connected to question(s)
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+
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 ## Use cases starting point