| Possible values |  |
- | Call Group1 You can relate as many subordinate call groups (of category Call Group2 )as you want to a call group of this category. Call Group2 You can subordinately relate a call group of this category to one call group of category Call Group1. Call Group2 A company that manufactures electrical goods uses the following structure to categorize the calls the company receives:
  Call Group1 | Call Group2
  Household items | Toasters Curling tongs Hair dryers
  Gardening items | Hedge trimmers Lawn mowers
  Carpentry items | Jigsaws Belt sanders Circular saws