ns of L(B) on
!O!x!S!, !O!x!I!, !S!x!I!, respectively,
we obtain the following set of Tables:

L(B)_OS  =  Proj_OS(L(B))
o---------------o---------------o
| Object        | Sign          |
o---------------o---------------o
| A             | &quot;A&quot;           |
| A             | &quot;u&quot;           |
o---------------o---------------o
| B             | &quot;B&quot;           |
| B             | &quot;i&quot;           |
o---------------o---------------o

L(B)_OI  =  Proj_OI(L(B))
o---------------o-