(Description updated based on comments through 19-July-2012)
Short names are allowed to be duplicated across concepts.
One example is that two different clinical concepts are expected to have short names of "HSM".
Another example is that Dave wants the concept whose fully-specified name is "YES" to be able to have a short name of "yes".
- ConceptValidator should ignore names with conceptNameType=SHORT when checking for duplicate names
- Verify that the HSM and YES use cases are supported.