{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/api-evangelist/bls-gov/main/json-schema/bls-time-series-schema.json",
  "title": "BLS Time Series",
  "description": "JSON Schema for a Bureau of Labor Statistics time series response, representing historical data points for a statistical series such as unemployment rate, CPI, or wage data.",
  "type": "object",
  "properties": {
    "seriesID": {
      "type": "string",
      "description": "The unique BLS series identifier",
      "pattern": "^[A-Z]{2,4}[0-9A-Z]{6,18}$",
      "examples": ["LNS14000000", "CUUR0000SA0", "CES0000000001"]
    },
    "catalog": {
      "$ref": "#/$defs/SeriesCatalog"
    },
    "data": {
      "type": "array",
      "description": "Array of data observations for this series",
      "items": {
        "$ref": "#/$defs/DataPoint"
      }
    },
    "calculations": {
      "$ref": "#/$defs/Calculations"
    }
  },
  "required": ["seriesID", "data"],
  "$defs": {
    "SeriesCatalog": {
      "title": "Series Catalog",
      "description": "Descriptive metadata for a BLS series (returned when catalog=true in v2 requests)",
      "type": "object",
      "properties": {
        "series_title": {
          "type": "string",
          "description": "Human-readable title of the series",
          "examples": ["Unemployment Rate", "All items in U.S. city average, all urban consumers"]
        },
        "series_id": {
          "type": "string",
          "description": "The series identifier"
        },
        "seasonality": {
          "type": "string",
          "description": "Whether data is seasonally adjusted or not",
          "enum": ["Seasonally Adjusted", "Not Seasonally Adjusted", ""]
        },
        "survey_name": {
          "type": "string",
          "description": "Full name of the BLS survey program",
          "examples": ["Current Population Survey", "Consumer Price Index - All Urban Consumers"]
        },
        "survey_abbreviation": {
          "type": "string",
          "description": "Two-letter abbreviation for the survey",
          "examples": ["LN", "CU", "CE", "OE"]
        },
        "measure_data_type": {
          "type": "string",
          "description": "The type of measurement for this series",
          "examples": ["Percent", "Index", "Number in Thousands", "Dollars"]
        },
        "commerce_industry": {
          "type": "string",
          "description": "Industry classification if applicable"
        },
        "occupation": {
          "type": "string",
          "description": "Occupation classification if applicable"
        },
        "area": {
          "type": "string",
          "description": "Geographic area for the data"
        },
        "footnote_codes": {
          "type": "string",
          "description": "Applicable footnote codes"
        },
        "begin_year": {
          "type": "string",
          "description": "First year of available data"
        },
        "begin_period": {
          "type": "string",
          "description": "First period of available data"
        },
        "end_year": {
          "type": "string",
          "description": "Most recent year of available data"
        },
        "end_period": {
          "type": "string",
          "description": "Most recent period of available data"
        }
      },
      "required": ["series_title", "survey_name"]
    },
    "DataPoint": {
      "title": "Data Point",
      "description": "A single observation in a BLS time series",
      "type": "object",
      "properties": {
        "year": {
          "type": "string",
          "pattern": "^\\d{4}$",
          "description": "4-digit year of the observation",
          "examples": ["2024", "2023", "2022"]
        },
        "period": {
          "type": "string",
          "pattern": "^(M(0[1-9]|1[0-3])|Q0[1-4]|A01|S0[12])$",
          "description": "Period code: M01-M12 (monthly), M13 (annual avg), Q01-Q04 (quarterly), A01 (annual), S01-S02 (semi-annual)",
          "examples": ["M01", "M12", "Q01", "A01"]
        },
        "periodName": {
          "type": "string",
          "description": "Human-readable period name",
          "examples": ["January", "December", "1st Quarter", "Annual"]
        },
        "latest": {
          "type": "string",
          "enum": ["true", "false"],
          "description": "Whether this is the most recent data point"
        },
        "value": {
          "type": "string",
          "description": "The statistical value for this observation",
          "examples": ["3.7", "314.175", "158526"]
        },
        "footnotes": {
          "type": "array",
          "items": {
            "$ref": "#/$defs/Footnote"
          }
        },
        "calculations": {
          "$ref": "#/$defs/Calculations"
        },
        "aspects": {
          "type": "array",
          "items": {
            "type": "object",
            "additionalProperties": true
          }
        }
      },
      "required": ["year", "period", "value"]
    },
    "Footnote": {
      "title": "Footnote",
      "description": "A footnote annotation for a data point",
      "type": "object",
      "properties": {
        "code": {
          "type": "string",
          "description": "Single-letter footnote code",
          "examples": ["P", "R"]
        },
        "text": {
          "type": "string",
          "description": "Footnote description",
          "examples": ["Preliminary", "Revised"]
        }
      }
    },
    "Calculations": {
      "title": "Calculations",
      "description": "Statistical calculations for a series or data point (v2 API only)",
      "type": "object",
      "properties": {
        "net_changes": {
          "type": "object",
          "description": "Net change values by time period",
          "properties": {
            "1": {
              "type": "string",
              "description": "1-month net change"
            },
            "3": {
              "type": "string",
              "description": "3-month net change"
            },
            "6": {
              "type": "string",
              "description": "6-month net change"
            },
            "12": {
              "type": "string",
              "description": "12-month net change"
            }
          }
        },
        "pct_changes": {
          "type": "object",
          "description": "Percent change values by time period",
          "properties": {
            "1": {
              "type": "string",
              "description": "1-month percent change"
            },
            "3": {
              "type": "string",
              "description": "3-month percent change"
            },
            "6": {
              "type": "string",
              "description": "6-month percent change"
            },
            "12": {
              "type": "string",
              "description": "12-month (year-over-year) percent change"
            }
          }
        }
      }
    }
  }
}