{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "schema:Substance",
  "title": "Substance",
  "description": "Any matter of defined composition that has discrete existence, whose origin may be biological, mineral or chemical.",
  "type": "object",
  "allOf": [
    {
      "description": "The most generic type of entity related to health and the practice of medicine.",
      "$ref": "schema:MedicalEntity"
    }
  ],
  "properties": {
    "activeIngredient": {
      "description": "An active ingredient, typically chemical compounds and/or biologic substances.",
      "oneOf": [
        { "type": "string" },
        { "type": "array", "items": { "type": "string" } }
      ]
    },
    "maximumIntake": {
      "description": "Recommended intake of this supplement for a given population as defined by a specific recommending authority.",
      "$ref": "schema:MaximumDoseSchedule"
    }
  }
}