logical_variables.csv

List of Columns

• study Name of the study (primary key)
• logical_dataset Name of the dataset (primary key)
• logical_variable Name of the variable (primary key)
• label Human-readable label.
• concept Name of the underlying concept (foreign key)
• questionnaire Name of the underlying questionnaire (foreign key)
• question Name of the underlying question (foreign key)
• item Name of the underlying item (foreign key)
• is_primary_key Boolean indicator, if this variable is part of the
  dataset’s primary key.
• basket_key Name of an study-specific identifier in this dataset, which
  is used for the script generator.
• basket_is_default Boolean indicator, whether a script generator should
  include this variable by default, if its dataset is used.

Special Rules

• The link to a question (or question item) is only established if the
  question already exists. There are no new questions created by
  variables.csv.