{
  "source_object": {
    "identity": "frozen source and declared state",
    "structure": "labelled rows, table or ordered graph",
    "measure": "edge lengths or category counts",
    "representation": "unit/grid, digit register where used, civil/phase/Rounded chart",
    "placement": "anchor or typed endpoint pair",
    "interpretation": "event roles, authorization and claim status"
  },
  "operations": [
    {
      "name": "measure and accumulate",
      "families": [
        "regular",
        "cumulative",
        "lists",
        "NT display"
      ]
    },
    {
      "name": "change topology or component measure",
      "families": [
        "Cainan variants",
        "BJ subdivisions",
        "Rounded rows"
      ]
    },
    {
      "name": "transform declared span",
      "families": [
        "Keys",
        "one-pass inverse",
        "carrier outer expansion"
      ]
    },
    {
      "name": "place and compare complete fields",
      "families": [
        "Mirror charts",
        "paired anchors",
        "weighted bridges",
        "macro heads"
      ]
    },
    {
      "name": "retain or transform internal subdivisions",
      "families": [
        "Covenant biographies",
        "component inverse paths"
      ]
    }
  ],
  "central_statement": "Families share operations on labelled measured structures; equality must specify which structure, measure, placement and subdivision survives.",
  "not_claimed": [
    "one universal chronology conversion",
    "historical origin of source choices",
    "unique globally minimal grammar"
  ]
}