Simplified index
Fix parent URI retrieval.
Fix NPE in index entry creation.
Fix tests
Fix performance tests
Handle null values in a better way.
Fix serializing/deserializing null origins.
Minor cleanup
Minor cleanup
Fix not being able to retrieve the origin location if the term had an origin term.
Added primitives that return key-value pairs.
Fix stupid typo
Fix another stupid typo
Added missing primitive
Merge branch 'index-ds-refactor'