Diagram 7: Give Each Record an "Id" Number

        id,"path","nationality","gender","age","income"
        1,"|Alpha","","","",""
        2,"|Alpha|Epsilon","","","",""
        3,"|Alpha|Epsilon|Kappa","","","",""
        4,"|Alpha|Zeta","","","",""
        5,"|Alpha|Zeta|Lambda","","","",""
        6,"|Alpha|Zeta|Mu","","","",""
        7,"|Beta","","","",""
        8,"|Beta|Eta","","","",""
        9,"|Beta|Theta","","","",""
        10,"|Gamma","","","",""
        11,"|Gamma|Iota","","","",""
        12,"|Gamma|Iota|Delta","","","",""
        13,"|Delta","","","",""

• Now, both "id" and "path" uniquely identify each record