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For more information about use of criteria, and for detailed examples see Automated text extraction, and Feature extraction.
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Creation Criteria Scripts
Both entity and association specification objects provide a field called "creationCriteriaScript". This must be JavaScript (though you still need to set the engine and enclose in either $SCRIPT or $FUNC), and you can return one of two things from it:
- A boolean, in which case the entity object is only created if
- A string, in which case any non-null string is treated like a boolean false, and in addition the string is logged as an error that can be accessed from the "harvest.harvest_message" field of sources.
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The creation criteria script is executed before any other scripts in the specification object. |