Automatic indirect key generation

• The new thorload option -GENERATE_INDIRECT will invoke automatic generation of indirect data keys. Use of indirect data can greatly reduce Thor database size and Merlin search times. Indirect referencing has always be good for computers; now it's convienent for humans.

• The options -EXCLUDE_INDIRECT and INCLUDE_INDIRECT combined with datatype specifications allow precise control over automatic key generation.

• Automatically generated indirect keys obey all the datatree conventions including subfield delimiters (~).

• The key generation uses a particularly clever quadruple hash scheme which is fast and efficient in space.

Example

Automatic indirect key generation is used in this example.