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Exercise 14: Implement SolvePathVariable
Summary
Inputs:
 | A parent entity, which might be null. |
| A parent relation type which describes the mandatory relationship between the parent entity and the variable entity that is being solved for. |
| A child entity, which might be null. |
| A child relation type which describes the mandatory relationship between the the variable entity that is being solved for and the child entity. |
Outputs:
All entities that satisfy the conditions.
To accomplish this, new indices and their respective look up functions will need to be added to the Entity and Brain classes:
New index:
Given an entity Y and relation type R, what entities X satisfy the relationship X R Y?
New lookup functions:
| 1. | GetInverseHasList: Given an entity X, which entities have a has_a relationship with X? |
| 2. | GetInverseIsAList: Given an entity X, which entities have a is_a relationship with X? (Actually, it appears that this one might not be needed) |
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