passing features as weighting and summarizer parameters is done with heuristics

[andreasbaumann]

Currently we have a subtle logic how to find out whether a parameter has to be passed as string/numeric parameter or as feature to a weighting or summarizer function:

• the parameter name exists in a location which is clearly expecting a feature (e. g. 'selection' is only accepting features)
• we take the desciption of the function as reference

[andreasbaumann]

the same applies for parameters expecting a term type (we check whether the term type exists in the storage).

[patrickfrey]

Do not understand this issue.