Upon receiving an input on "in", an accessor extending this accessor should implement a transformation to convert that value from a concept in the input ontology to a matching concept in the output ontology produced as output on "out".
An extending accessor must override the "exports.matching" function. This accessor's fire function ensures the special string "$?" will be passed directly through any extending adapters.
||A value from the input ontology.|
||A value from the output ontology matching the input ontology value which triggered its production.|