{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://montri-th.github.io/Landometer/v0.9.7/package/assets/lds-0.9.7/machine/evidence-value.schema.json",
  "title": "Landometer DS0.9.7 evidence-value.schema.json",
  "description": "Numeric value/state pair only. Other record metadata is allowed and remains governed by the original claim/provenance contracts. This schema does not approve a claim.",
  "type": "object",
  "required": [
    "value",
    "state"
  ],
  "properties": {
    "state": {
      "enum": [
        "measured",
        "measured_zero",
        "no_data",
        "out_of_scope",
        "suppressed",
        "not_yet"
      ]
    },
    "value": {
      "type": [
        "number",
        "null"
      ]
    }
  },
  "oneOf": [
    {
      "properties": {
        "state": {
          "const": "measured"
        },
        "value": {
          "type": "number",
          "not": {
            "const": 0
          }
        }
      }
    },
    {
      "properties": {
        "state": {
          "const": "measured_zero"
        },
        "value": {
          "const": 0
        }
      }
    },
    {
      "properties": {
        "state": {
          "enum": [
            "no_data",
            "out_of_scope",
            "suppressed",
            "not_yet"
          ]
        },
        "value": {
          "type": "null"
        }
      }
    }
  ],
  "$comment": "Current unsigned LDS 0.9.7 contract. Historical source bytes remain immutable."
}