{
  "schema": "tracer-rise-counting-v1",
  "length_unit": "choose one consistent unit",
  "counting_expression": "Hup=sum(max(0,z[i+1]-z[i]))",
  "meaning": "Derived counting operation; no pressure conversion or acceptance limit",
  "physical_context": "Gray pipe, flange and valve outlines explain why the orange tracer takes local detours; schematic elevation projections, not fabrication dimensions",
  "examples": [
    {
      "location": "flange",
      "sum": [
        "A",
        "B",
        "C"
      ]
    },
    {
      "location": "valve",
      "sum": "each repeated X"
    },
    {
      "location": "route",
      "sum": [
        "A",
        "B",
        "C",
        "D"
      ]
    }
  ],
  "numerical_bases_separate": [
    "40% empirical gauge-pressure numerical route",
    "15% installation clause feet/supply-pressure wording",
    "unresolved operator-glyph pressure-difference display"
  ],
  "unresolved_scalar_criterion": "not reconstructed",
  "source_equation_acceptance": "no agent or human verification inferred"
}