Problem: Is the Taxonomy Valid?

• Two potential defects:

• Missing branch node

        "|General Motors","","",0
        "|General Motors|Chevrolet","","",0
        "|General Motors|Chevrolet|Spark",100000,0.15,1

• Two children of same parent with same name

        "|General Motors|Chevrolet|Sonic",100000,0.15,1
        "|General Motors|Chevrolet|Sonic",150000,0.20,1