{
  "type": "string",
  "description": "Reference to an Observer Profile. Formalizes sensory, attention, and epistemological characteristics of the observer. Enables quantifiable analysis. See observer-profiles/ and schemas/observer-model-0.1.json.",
  "pattern": "^obs_[a-z0-9_]+$",
  "examples": [
    "obs_live_close_amateur",
    "obs_live_close_expert",
    "obs_camera_hd_static",
    "obs_stage_10m_group"
  ]
}