ORM
- Checking
Check each entity
can be precisely defined
Simply, populate
your schema, and then attempt a few external assertions (ie. try to
add some data and check where all of the parts of the update request
must reside)
What you are looking
for in this step is entities that don't actually exist (when you inject
populations this will be obvious) - INFORMATION FLOW ANALYSIS
is what this process is sometimes termed. You track what information
goes where.
normally not much
to do here... (that is if you have done the previous 6 steps correctly
8^)
ORM
- Exotic Constraints
Add Equality, Exclusion,
Subset and any other type of constraint
- E1's involved
in R1 are not in R2 (EXCLUSION constraint)
- Every E1 involved
in R3 is also in R4 (EQUALITY constraint) - note this may be
different to a MANDATORY ROLE constraint
- Every E1 involved
in R6 (subset) is also involved in R5 (SUPERSET), but not necessarily
visa-versa (SUBSET constraint) - subset < superset (i.i. the
subset points to the superset - this shows the line of inheritance)
The picture gets
considerably complicated when MANDATORY ROLES are also included, along
with sub-types
Further Constraints
ORM
- Final Checks
Have one long, last
look for any anomolies, then you are done.
