{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "housing",
  "type": "object",
  "required": ["published_at", "prices", "rents", "sales", "mortgage", "affordability", "parameters"],
  "additionalProperties": false,
  "properties": {
    "published_at": {"type": "string"},
    "prices": {
      "type": "object",
      "required": ["case_shiller", "fhfa", "zhvi"],
      "additionalProperties": false,
      "properties": {
        "case_shiller": {"$ref": "#/$defs/measure"},
        "fhfa": {"$ref": "#/$defs/measure"},
        "zhvi": {"$ref": "#/$defs/measure"}
      }
    },
    "rents": {
      "type": "object",
      "required": ["zori", "aptlist"],
      "additionalProperties": false,
      "properties": {"zori": {"$ref": "#/$defs/measure"}, "aptlist": {"$ref": "#/$defs/measure"}}
    },
    "sales": {"$ref": "#/$defs/measure"},
    "mortgage": {
      "type": "object",
      "required": ["pmms_30yr", "mnd_30yr_daily"],
      "additionalProperties": false,
      "properties": {"pmms_30yr": {"$ref": "#/$defs/point"}, "mnd_30yr_daily": {"$ref": "#/$defs/point"}}
    },
    "affordability": {
      "type": "object",
      "required": ["as_of", "price", "rate_pct", "payment", "income", "share_pct",
                   "share_2018_01_pct", "history"],
      "additionalProperties": false,
      "properties": {
        "as_of": {"$ref": "#/$defs/day"},
        "price": {"$ref": "#/$defs/num"},
        "rate_pct": {"$ref": "#/$defs/num"},
        "payment": {"$ref": "#/$defs/num"},
        "income": {"$ref": "#/$defs/num"},
        "share_pct": {"$ref": "#/$defs/num"},
        "share_2018_01_pct": {"$ref": "#/$defs/num"},
        "history": {
          "type": "object",
          "required": ["months", "price", "rate_pct", "payment", "income", "share_pct"],
          "additionalProperties": false,
          "properties": {
            "months": {"type": "array", "items": {"type": "string", "pattern": "^\\d{4}-\\d{2}-\\d{2}$"}},
            "price": {"type": "array", "items": {"type": "number"}},
            "rate_pct": {"type": "array", "items": {"type": "number"}},
            "payment": {"type": "array", "items": {"type": "number"}},
            "income": {"type": "array", "items": {"type": "number"}},
            "share_pct": {"type": "array", "items": {"type": "number"}}
          }
        }
      }
    },
    "parameters": {
      "type": "object",
      "required": ["ltv", "term_months", "hours_per_year", "income_proxy", "rate"],
      "additionalProperties": false,
      "properties": {
        "ltv": {"type": "number"},
        "term_months": {"type": "integer"},
        "hours_per_year": {"type": "integer"},
        "income_proxy": {"type": "string"},
        "rate": {"type": "string"}
      }
    }
  },
  "$defs": {
    "num": {"type": ["number", "null"]},
    "day": {"type": ["string", "null"], "pattern": "^\\d{4}-\\d{2}-\\d{2}$"},
    "point": {
      "type": "object",
      "required": ["value", "as_of"],
      "additionalProperties": false,
      "properties": {"value": {"$ref": "#/$defs/num"}, "as_of": {"$ref": "#/$defs/day"}}
    },
    "measure": {
      "type": "object",
      "required": ["code", "label", "unit", "value", "as_of", "yoy_pct"],
      "additionalProperties": false,
      "properties": {
        "code": {"type": "string"},
        "label": {"type": "string"},
        "unit": {"type": "string"},
        "value": {"$ref": "#/$defs/num"},
        "as_of": {"$ref": "#/$defs/day"},
        "yoy_pct": {"$ref": "#/$defs/num"}
      }
    }
  }
}