...
concept_reference_range: This table holds the absolute, critical, and normal ranges along with acriteriacolumn. Thecriteriacolumn 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.
...
This design allows for easy updates and expansions of criteria without requiring changes to the underlying database schema.
Business Logic Flow
...
Strict Ranges
When multiple reference ranges, of one concept numeric, are evaluated to true, then we use the strictest range.
...
Schema changes
This section details the new tables and relationships added to the OpenMRS data model to support factor-based concept ranges.
...