/-----------\          /-------------------\
 |  Company  |          | Company::Division |
 \-----------/          \-------------------/
      /|\                        /|\
       |                          | (is-a)
       |                          |
       |                /-------------------\
       | (is-a)         | AcmeLtd::Division |
       |                \-------------------/
       |                         /|\
       |                          | (is-a)
       |                          |
 /-----------\             /-------------\
 |  AcmeLtd  |------>------| AcmeLtd::IT |
 \-----------/   (has-a)   \-------------/