{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://publicschema.org/metrics/PopulationCriterion.schema.json",
  "title": "PopulationCriterion",
  "description": "One population in a MetricCalculation, paired with the language and criteria that select the records belonging to it. The population_type follows FHIR R5 Measure: initial-population, denominator, denominator-exclusion, denominator-exception, numerator, numerator-exclusion, measure-population, measure-population-exclusion, measure-observation. Authors validate population_type against the MetricCalculation.scoring value at schema-load time.\n",
  "type": "object",
  "properties": {
    "population_type": {
      "type": "string",
      "enum": [
        "initial-population",
        "denominator",
        "denominator-exclusion",
        "denominator-exception",
        "numerator",
        "numerator-exclusion",
        "measure-population",
        "measure-population-exclusion",
        "measure-observation"
      ],
      "$comment": "https://publicschema.org/vocab/population-type",
      "description": "The role this population plays in the calculation: initial-population, denominator, denominator-exclusion, denominator-exception, numerator, numerator-exclusion, measure-population, measure-population-exclusion, or measure-observation. Follows FHIR R5 Measure.\n"
    },
    "language": {
      "type": "string",
      "description": "The IANA media type identifying the language of a criteria expression: application/sql, application/vtl, text/cql, text/fhirpath. PublicSchema pins the media type so consumers know which engine to invoke; it does not pick a winner.\n"
    },
    "criteria": {
      "type": "string",
      "description": "A criteria expression in the language identified by the paired language slot. May be inline source code or a reference of the form @ref:LibraryName.Symbol resolved against the calculation's libraries list.\n"
    }
  }
}