{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://concert.foundation/signet/v0.1/need.schema.json",
  "title": "Need",
  "description": "The demand signal that initiates procurement (OCDS planning stage).",
  "type": "object",
  "required": [
    "id",
    "title",
    "requestingParty"
  ],
  "additionalProperties": false,
  "properties": {
    "@context": {
      "type": [
        "string",
        "object",
        "array"
      ]
    },
    "type": {
      "const": "Need"
    },
    "id": {
      "$ref": "definitions.schema.json#/definitions/Identifier"
    },
    "title": {
      "type": "string"
    },
    "description": {
      "type": "string"
    },
    "requestingParty": {
      "$ref": "definitions.schema.json#/definitions/Identifier"
    },
    "budget": {
      "$ref": "definitions.schema.json#/definitions/Value"
    },
    "classification": {
      "$ref": "definitions.schema.json#/definitions/Classification"
    },
    "rationale": {
      "type": "string"
    },
    "governingPolicies": {
      "type": "array",
      "items": {
        "$ref": "definitions.schema.json#/definitions/Identifier"
      },
      "description": "Policy references constraining this procurement."
    }
  }
}