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  "documentId": "5c1e9a47-2f60-4b83-9d15-7ae2c840f6b1",
  "revision": 1,
  "meta": {
    "title": "Rack unit 240 (fictional sample)",
    "locale": "en",
    "createdAt": "2026-09-16T00:00:00Z",
    "updatedAt": "2026-09-16T00:00:00Z"
  },
  "model": {
    "code": "PNC-240-RS-W",
    "items": [
      {
        "id": "item-series",
        "range": {
          "start": 0,
          "end": 3,
          "unit": "grapheme"
        },
        "heading": "Series",
        "side": "left",
        "options": [
          {
            "code": "PNC",
            "description": "Standard series (fictional)",
            "noteRefs": []
          }
        ]
      },
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        "id": "item-width",
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          "end": 7,
          "unit": "grapheme"
        },
        "heading": "Width",
        "side": "left",
        "options": [
          {
            "code": "240",
            "description": "240 mm",
            "noteRefs": []
          },
          {
            "code": "320",
            "description": "320 mm",
            "noteRefs": []
          }
        ]
      },
      {
        "id": "item-mount",
        "range": {
          "start": 8,
          "end": 10,
          "unit": "grapheme"
        },
        "heading": "Mounting",
        "side": "right",
        "options": [
          {
            "code": "RS",
            "description": "Rack mount{{note:note-sample}}",
            "noteRefs": [
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          },
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            "code": "WS",
            "description": "Wall mount",
            "noteRefs": []
          }
        ]
      },
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        "id": "item-color",
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          "start": 11,
          "end": 12,
          "unit": "grapheme"
        },
        "heading": "Colour",
        "side": "right",
        "options": [
          {
            "code": "W",
            "description": "White",
            "noteRefs": []
          },
          {
            "code": "K",
            "description": "Black",
            "noteRefs": []
          }
        ]
      }
    ],
    "notes": [
      {
        "id": "note-sample",
        "text": "This diagram uses an invented part number, for illustration. It represents no real product."
      }
    ]
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