{
  "schema_version": 1,
  "task": "image-level multi-label classification",
  "classes": [
    {
      "name": "hollow",
      "definition": "Visually suspected facade hollowing observable in UAV imagery; not destructively verified subsurface damage."
    },
    {
      "name": "spalling",
      "definition": "Visible facade material spalling."
    },
    {
      "name": "crack",
      "definition": "Visible facade cracking."
    },
    {
      "name": "no_defect",
      "definition": "None of hollow, spalling, or crack is present at image level.",
      "derived": true
    }
  ]
}