Named Entity Recognition Grammars Package 26.2
Named Entity Recognition Grammars User Guide

# Customize Checksum Validation

During post-processing, Named Entity Recognition attempts to validate a match by calculating a checksum. If validation fails, the match is discarded. You can customize this behavior by setting environment variables that are read by the post-processing script.

To stop rejecting Named Entity Recognition matches that fail checksum validation, set the environment variable `IDOL_PII_CHECKSUM_VALIDATION_STRICT` to `FALSE`. Instead, the script applies a score penalty, and add an `INVALID_CHECKSUM` component to the match.

NOTE: This environment variable has the same name in all grammar sets. That is, it is `IDOL_PII_CHECKSUM_VALIDATION_STRICT` for the PII, PHI, PCI, and GOV grammar post-processing script.

You can configure the score penalty by setting the environment variable `IDOL_PII_CHECKSUM_VALIDATION_FAIL_PENALTY` to a value between 0.0 and 1.0. When validation fails, Named Entity Recognition multiplies the score by this value. The default value is 0.9.

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Version 26.2 | Last updated April 2026

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Product: Named Entity Recognition Grammars Package 26.2

Topic Title: Customize Checksum Validation