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• concept_reference_range: This table holds the absolute, critical, and normal ranges along with a criteria column. The criteria column contains a coded function that performs validation checks, such as those based on age or gender, using the Velocity engine for evaluationvelocity text expressions that evaluate to true or false.

• obs_reference_range: This table stores the validated reference ranges for observation numeric values that have been used in validation after the criteria have been applied.

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