{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/api-evangelist/us-senate/main/json-schema/us-senate-lda-filing-schema.json",
  "title": "Senate LDA Lobbying Filing",
  "description": "JSON Schema for a Senate Lobbying Disclosure Act (LDA) filing record.",
  "type": "object",
  "properties": {
    "filing_uuid": {
      "type": "string",
      "format": "uuid",
      "description": "Unique identifier for this filing"
    },
    "filing_type": {
      "type": "string",
      "description": "Filing type code (LD1, LD2, MM, YE, Q1, Q2, Q3, Q4)"
    },
    "filing_type_display": {
      "type": "string",
      "description": "Human-readable filing type"
    },
    "filing_year": {
      "type": "integer",
      "description": "Calendar year of the filing"
    },
    "filing_period": {
      "type": "string",
      "enum": ["registration", "first_quarter", "second_quarter", "mid_year", "third_quarter", "fourth_quarter", "year_end", "termination"],
      "description": "Filing period identifier"
    },
    "income": {
      "type": ["number", "null"],
      "description": "Lobbying income reported (for lobbying firms)"
    },
    "expenses": {
      "type": ["number", "null"],
      "description": "Lobbying expenses reported (for self-employed lobbyists)"
    },
    "dt_posted": {
      "type": "string",
      "format": "date-time",
      "description": "Date and time the filing was posted"
    },
    "registrant": {
      "$ref": "#/$defs/Registrant"
    },
    "client": {
      "$ref": "#/$defs/Client"
    },
    "lobbying_activities": {
      "type": "array",
      "items": {
        "$ref": "#/$defs/LobbyingActivity"
      }
    }
  },
  "required": ["filing_uuid", "filing_type", "filing_year"],
  "$defs": {
    "Registrant": {
      "type": "object",
      "properties": {
        "id": {"type": "integer"},
        "name": {"type": "string"},
        "city": {"type": ["string", "null"]},
        "state": {"type": ["string", "null"]},
        "country": {"type": "string"}
      },
      "required": ["id", "name"]
    },
    "Client": {
      "type": "object",
      "properties": {
        "id": {"type": "integer"},
        "name": {"type": "string"},
        "state": {"type": ["string", "null"]},
        "country": {"type": "string"}
      },
      "required": ["id", "name"]
    },
    "LobbyingActivity": {
      "type": "object",
      "properties": {
        "general_issue_code": {
          "type": "string",
          "description": "Issue area code (e.g., TAX, HCR, DEF)"
        },
        "general_issue_code_display": {
          "type": "string"
        },
        "description": {
          "type": ["string", "null"],
          "description": "Specific issues lobbied on"
        },
        "government_entities": {
          "type": "array",
          "items": {
            "type": "object",
            "properties": {
              "name": {"type": "string"}
            }
          }
        },
        "lobbyists": {
          "type": "array",
          "items": {
            "type": "object"
          }
        }
      }
    }
  }
}