{
  "model_id": "PI-HGAT-T",
  "model_definition": "Perspective-Informed Heterogeneous Graph Attention Network for Triads; reference implementation for empirical structural evaluation of IOM relations.",
  "seed": 20261008,
  "device": "cpu",
  "validation": "leave-one-triad-out",
  "epochs": 100,
  "hidden_dim": 32,
  "attention_heads": 4,
  "learning_rate": 0.003,
  "weight_decay": 0.0001,
  "optimizer": "AdamW",
  "loss": "class-weighted cross entropy",
  "features": [
    "one-hot phase adv/ret",
    "one-hot position left/center/right"
  ],
  "prohibited_features": [
    "lexical labels",
    "triad index",
    "target relation"
  ],
  "candidate_relations": [
    "none",
    "mirrorOf",
    "creates"
  ],
  "threshold_policy": "Empirical evaluation against deterministic RDF/SHACL target properties. Reference criterion is exact reconstruction (1.0); observed scores quantify recoverability.",
  "target_properties": {
    "mirrorOf": "same triad; opposite phase; reciprocal; lateral positions exchange and center remains center",
    "creates": "same triad; opposite phase; follows the four declared left/center-to-center/laterals creation rules"
  }
}