{
  "title": "Jig and fixture data for AI datum and view evidence",
  "source_page": "https://fiund.com/industries/jig-fixture-datum-view-data",
  "authorship": "Original fictional Fiund editorial exercise. No actual operating records or third-party source assets are included.",
  "example": {
    "title": "Locate a point after rotating the fixture view",
    "context": "An original paper fixture has square and triangle landmarks. Coordinates are arbitrary dimensions for a visual task.",
    "records": [
      [
        "1",
        "Drawing",
        "From square to triangle defines +x; point P is 6 mm in +x."
      ],
      [
        "2",
        "Photo",
        "Square at right, triangle at left, P six scale marks left of square."
      ],
      [
        "3",
        "Scale",
        "One mark per millimeter, perspective corrected in the mock frame."
      ]
    ],
    "question": "Does the photo match the point's drawing coordinate?",
    "answer": "Yes. In record 2, left is the fixture's +x because it points from square toward triangle. Six scale marks therefore give +6 mm using record 3, matching record 1. A screen-coordinate convention would reverse the sign incorrectly.",
    "failureModes": [
      "Interpreting image-left as negative by default",
      "Ignoring the stated scale"
    ],
    "fields": [
      [
        "datum_origin",
        "Fixes where measurement starts"
      ],
      [
        "axis_direction_markers",
        "Maps the local axis through rotation"
      ],
      [
        "point_offset",
        "Stores the signed measurement"
      ]
    ],
    "holdout": "Reverse the triangle and square positions with one obscured; require both anchors before inferring sign.",
    "boundary": "No actual jig design, setup procedure, tooling parameters or production fit claims."
  }
}