{
  "handle": "Metric",
  "data_schema": {
    "type": "object",
    "required": [
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      "measurement_rule",
      "value_schema"
    ],
    "properties": {
      "target_property": {
        "type": "string",
        "description": "Property or construct whose quantity the Metric defines"
      },
      "measurement_rule": {
        "type": "string",
        "description": "Rule or procedure that derives a value from the target property"
      },
      "value_schema": {
        "type": "object",
        "description": "JSON Schema for quantitative outputs, including the units, range, or dimensions needed to interpret them"
      }
    }
  },
  "mechanism": "A definition of a quantitative property. It identifies the target property, the rule used to derive its values, and the value schema that makes those values interpretable. Applying the definition produces readings; observed values and their context are recorded separately rather than changing the definition.",
  "gloss": "Definition of a quantitative property and its value semantics",
  "invariants": [
    "Quantitative Output: `value_schema` admits only numbers or finite structures whose leaves are numbers, and declares the units, range, or dimensions needed to interpret them."
  ],
  "_meta": {
    "ring": 0,
    "tier": 1,
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    "path": [
      "Infrastructure",
      "Data Structures"
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    "related": [
      "Metricmirror#c7c5"
    ]
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  "sema_id": "sema:Metric#mh:SHA-256:aa990383741b05e3b798abc7518d9e65c0cc7832b345d4cfed48714ef2501230",
  "sema_ref": "Metric#aa99",
  "sema_stub": "aa99",
  "sema_layer": "Infrastructure",
  "sema_category": "Data Structures",
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      "MetricReading": "sema:MetricReading#mh:SHA-256:56a9f18faad70147312f12c1cdb1bcea9cb5d1d61042831d1fe6bfa11414ab26",
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}