{
  "matspec": "0.2",
  "specification": {
    "designation": "MJ-100",
    "organization": "MatJSON Examples",
    "title": "Synthetic Alloy Plate for Demonstration Only",
    "edition": "2026",
    "product_forms": [
      "plate"
    ],
    "kind": "product"
  },
  "provenance": {
    "source": "Original synthetic MatJSON example; not an engineering specification.",
    "extracted": "2026-08-24",
    "method": "manual",
    "extracted_scope": "Complete synthetic example"
  },
  "grades": [
    {
      "id": "MJ-100-A",
      "designation": {
        "grade": "A",
        "class": null,
        "type": null,
        "uns": null
      },
      "chemistry": {
        "elements": {
          "X": [
            {
              "min": 1.0,
              "max": 2.0,
              "unit": "wt%",
              "source": "Synthetic Table 1"
            }
          ]
        },
        "notes": [
          "Element X is fictitious. Do not use this example for engineering."
        ]
      },
      "mechanical": null,
      "hardness": null,
      "impact": null,
      "heat_treatment": null
    }
  ],
  "required_tests": [],
  "supplementary_requirements": [],
  "notes": {
    "synthetic": "All values are invented for demonstration."
  }
}