idiomatic.tc defines a few macros for common expressions in classification.
Those macros which test for specific properties are optimized for
rapid processing in tcng and typically also yield more
efficient classifiers. For each such macro, there is also a macro that
tests for the absence of that property. Those macros have the
same name, prefixed with not_, and are normally more
efficient than using the negation operator (!).
Note that idiomatic.tc is included via fields.tc and should not be included directly.