{
  "prefix": {
    "id": "PR19",
    "name": "femto",
    "ml_name": "pr_si_femto",
    "symbol": "f",
    "numerator": 1.0,
    "denominator": 1000000000000000.0,
    "reference": "https://si-digital-framework.org/SI/prefixes/femto"
  },
  "system_dimensions": {
    "id": "DI8",
    "exponents": "[0,0,0,0,0,0,0]",
    "formal_system": {
      "id": "SY1"
    }
  },
  "root_scale": "SC9",
  "unit": "UN431",
  "aspects": [],
  "conversions": [],
  "casts": [],
  "id": "SC261",
  "ml_name": "ra_si_frad",
  "scale_type": "ratio",
  "is_systematic": null,
  "is_special": null,
  "ref_point": null,
  "ref_point_l": null,
  "ref_point_h": null
}