{
  "schema_version": "abbo-interval-contained-pollen-design.v1",
  "closed_taxa": [
    "Alnus", "Amaranthaceae", "Betula", "Cichorioideae", "Cyperaceae",
    "Filipendula", "Frangula alnus", "Nuphar", "Plantago lanceolata",
    "Plantago media", "Populus", "Quercus", "Rosaceae undiff.", "Salix",
    "Thalictrum", "Ulmus"
  ],
  "age_bin_width_cal_bp": 500,
  "common_age_bin_ids": [3, 4, 5, 9],
  "sites": {
    "19913": {"label": "Abborrtjärnen", "site_id": "13338", "record_id": "neotoma-dataset:19913", "group_id": "neotoma-site:13338", "latitude": 63.88333, "longitude": 14.45},
    "53995": {"label": "Bussjösjön", "site_id": "28869", "record_id": "neotoma-dataset:53995", "group_id": "neotoma-site:28869", "latitude": 55.46667, "longitude": 13.81667},
    "54001": {"label": "Bökesjön", "site_id": "28872", "record_id": "neotoma-dataset:54001", "group_id": "neotoma-site:28872", "latitude": 55.57556, "longitude": 13.4375}
  },
  "allowed_inputs": ["held-out target WGS84 coordinate", "fixed 500-cal-BP bin label", "cohort-level LegacyAge age bounds for pre-prediction common-bin support selection only"],
  "age_support_rule": "ABBO samples enter a common bin only when their entire LegacyAge S5 reported 95% interval is inside that half-open bin; other sites retain their native Neotoma point chronologies",
  "methods": ["training_mean", "nearest_site", "inverse_distance_squared", "clr_rbf_ridge"],
  "fixed_clr_rbf": {"distance_scale": "median positive pairwise training distance", "ridge_penalty": 0.01, "training_zero_handling": "add 0.5 to each declared training taxon only"},
  "prior_exposure": "development sensitivity on previously inspected three Swedish sites; no confirmatory claim"
}