{
  "cell_schema": {
    "claim_id": "deterministic field claim id when value is non-null",
    "null_reason": "one documented reason when value is null; otherwise null",
    "precision_class": "one of the six documented precision classes",
    "provenance_missing": "true only for a non-null value without a source URL",
    "source_date": "YYYY-MM-DD observation/publication date or empty",
    "source_url": "HTTP(S) provenance URL or empty when explicitly flagged missing",
    "value": "typed value or null"
  },
  "fields": {
    "affiliate_available": {
      "description": "affiliate available",
      "layer": "X_affiliate",
      "precision_class": "P3_brand_page"
    },
    "affiliate_url": {
      "description": "affiliate url",
      "layer": "X_affiliate",
      "precision_class": "P3_brand_page"
    },
    "app": {
      "description": "app",
      "layer": "C_trace",
      "precision_class": "P3_brand_page"
    },
    "app_days_since_update": {
      "description": "app days since update",
      "layer": "F_brand_risk",
      "precision_class": "P2_platform"
    },
    "app_last_update": {
      "description": "app last update",
      "layer": "F_brand_risk",
      "precision_class": "P2_platform"
    },
    "app_name": {
      "description": "app name",
      "layer": "F_brand_risk",
      "precision_class": "P2_platform"
    },
    "app_off_date": {
      "description": "app off date",
      "layer": "F_brand_risk",
      "precision_class": "P2_platform"
    },
    "app_rating": {
      "description": "app rating",
      "layer": "F_brand_risk",
      "precision_class": "P2_platform"
    },
    "app_ratings_n": {
      "description": "app ratings n",
      "layer": "F_brand_risk",
      "precision_class": "P2_platform"
    },
    "app_required_for_daily_use": {
      "description": "app required for daily use",
      "layer": "F_brand_risk",
      "precision_class": "P2_platform"
    },
    "app_store_id": {
      "description": "app store id",
      "layer": "F_brand_risk",
      "precision_class": "P2_platform"
    },
    "batteries_usd_year": {
      "description": "batteries usd year",
      "layer": "G_tco",
      "precision_class": "P3_brand_page"
    },
    "battery_life_hours": {
      "description": "battery life hours",
      "layer": "C_trace",
      "precision_class": "P3_brand_page"
    },
    "battery_type": {
      "description": "battery type",
      "layer": "C_trace",
      "precision_class": "P3_brand_page"
    },
    "bluetooth": {
      "description": "bluetooth",
      "layer": "C_trace",
      "precision_class": "P3_brand_page"
    },
    "brand": {
      "description": "brand",
      "layer": "C_trace",
      "precision_class": "P3_brand_page"
    },
    "brand_status": {
      "description": "brand status",
      "layer": "F_brand_risk",
      "precision_class": "P3_brand_page"
    },
    "brand_status_source_url": {
      "description": "brand status source url",
      "layer": "F_brand_risk",
      "precision_class": "P3_brand_page"
    },
    "charger_included": {
      "description": "charger included",
      "layer": "G_tco",
      "precision_class": "P3_brand_page"
    },
    "charger_usd": {
      "description": "charger usd",
      "layer": "G_tco",
      "precision_class": "P3_brand_page"
    },
    "clearance_type": {
      "description": "clearance type",
      "layer": "B_evidence",
      "precision_class": "P1_official"
    },
    "clinical_design": {
      "description": "clinical design",
      "layer": "E_science",
      "precision_class": "P1_official"
    },
    "clinical_n": {
      "description": "clinical n",
      "layer": "E_science",
      "precision_class": "P1_official"
    },
    "clinical_outcomes": {
      "description": "clinical outcomes",
      "layer": "E_science",
      "precision_class": "P1_official"
    },
    "clinical_result_summary": {
      "description": "clinical result summary",
      "layer": "E_science",
      "precision_class": "P1_official"
    },
    "cloud_end_date": {
      "description": "cloud end date",
      "layer": "F_brand_risk",
      "precision_class": "P3_brand_page"
    },
    "decision_date": {
      "description": "decision date",
      "layer": "B_evidence",
      "precision_class": "P1_official"
    },
    "disclosure_completeness": {
      "description": "disclosure completeness",
      "layer": "G_tco",
      "precision_class": "P5_computed"
    },
    "domes_usd_year": {
      "description": "domes usd year",
      "layer": "G_tco",
      "precision_class": "P3_brand_page"
    },
    "dominance_gap_usd": {
      "description": "dominance gap usd",
      "layer": "A_sound",
      "precision_class": "P5_computed"
    },
    "dominance_reason": {
      "description": "dominance reason",
      "layer": "A_sound",
      "precision_class": "P5_computed"
    },
    "dominance_status": {
      "description": "dominance status",
      "layer": "A_sound",
      "precision_class": "P5_computed"
    },
    "dominated_by": {
      "description": "dominated by",
      "layer": "A_sound",
      "precision_class": "P5_computed"
    },
    "editorial_rank_independent": {
      "description": "editorial rank independent",
      "layer": "X_affiliate",
      "precision_class": "P5_computed"
    },
    "electroacoustic_standard": {
      "description": "electroacoustic standard",
      "layer": "I_electroacoustics",
      "precision_class": "P1_official"
    },
    "eq_input_noise_db": {
      "description": "eq input noise db",
      "layer": "I_electroacoustics",
      "precision_class": "P1_official"
    },
    "evidence_battery_hours": {
      "description": "evidence battery hours",
      "layer": "I_electroacoustics",
      "precision_class": "P1_official"
    },
    "evidence_tier": {
      "description": "evidence tier",
      "layer": "B_evidence",
      "precision_class": "P5_computed"
    },
    "evidence_tier_label": {
      "description": "evidence tier label",
      "layer": "B_evidence",
      "precision_class": "P5_computed"
    },
    "fda_category": {
      "description": "fda category",
      "layer": "C_trace",
      "precision_class": "P3_brand_page"
    },
    "fda_codes": {
      "description": "fda codes",
      "layer": "C_trace",
      "precision_class": "P3_brand_page"
    },
    "fda_company": {
      "description": "fda company",
      "layer": "C_trace",
      "precision_class": "P3_brand_page"
    },
    "fda_listing_name": {
      "description": "fda listing name",
      "layer": "C_trace",
      "precision_class": "P3_brand_page"
    },
    "fda_trace": {
      "description": "fda trace",
      "layer": "C_trace",
      "precision_class": "P3_brand_page"
    },
    "fda_udi_hits": {
      "description": "fda udi hits",
      "layer": "C_trace",
      "precision_class": "P3_brand_page"
    },
    "flag_continuity": {
      "description": "flag continuity",
      "layer": "F_brand_risk",
      "precision_class": "P5_computed"
    },
    "flag_safety": {
      "description": "flag safety",
      "layer": "D_safety",
      "precision_class": "P5_computed"
    },
    "flag_software": {
      "description": "flag software",
      "layer": "F_brand_risk",
      "precision_class": "P5_computed"
    },
    "form_factor": {
      "description": "form factor",
      "layer": "C_trace",
      "precision_class": "P3_brand_page"
    },
    "freq_range_hz": {
      "description": "freq range hz",
      "layer": "I_electroacoustics",
      "precision_class": "P1_official"
    },
    "frontier": {
      "description": "frontier",
      "layer": "A_sound",
      "precision_class": "P5_computed"
    },
    "has_own_clinical_study": {
      "description": "has own clinical study",
      "layer": "B_evidence",
      "precision_class": "P1_official"
    },
    "hfa_full_on_gain_db": {
      "description": "hfa full on gain db",
      "layer": "I_electroacoustics",
      "precision_class": "P1_official"
    },
    "ht_score": {
      "description": "ht score",
      "layer": "A_sound",
      "precision_class": "P4_cited_lab"
    },
    "ht_url": {
      "description": "ht url",
      "layer": "A_sound",
      "precision_class": "P4_cited_lab"
    },
    "id": {
      "description": "id",
      "layer": "C_trace",
      "precision_class": "P3_brand_page"
    },
    "k_map_confidence": {
      "description": "k map confidence",
      "layer": "B_evidence",
      "precision_class": "P1_official"
    },
    "k_number": {
      "description": "k number",
      "layer": "B_evidence",
      "precision_class": "P1_official"
    },
    "last_verified": {
      "description": "last verified",
      "layer": "F_brand_risk",
      "precision_class": "P5_computed"
    },
    "latency_ms": {
      "description": "latency ms",
      "layer": "I_electroacoustics",
      "precision_class": "P1_official"
    },
    "local_functionality": {
      "description": "local functionality",
      "layer": "F_brand_risk",
      "precision_class": "P3_brand_page"
    },
    "loss_damage_coverage": {
      "description": "loss damage coverage",
      "layer": "G_tco",
      "precision_class": "P3_brand_page"
    },
    "maude_caveat": {
      "description": "maude caveat",
      "layer": "D_safety",
      "precision_class": "P5_computed"
    },
    "maude_events_brand": {
      "description": "maude events brand",
      "layer": "D_safety",
      "precision_class": "P1_official"
    },
    "maude_query_text": {
      "description": "maude query text",
      "layer": "D_safety",
      "precision_class": "P5_computed"
    },
    "maude_scope": {
      "description": "maude scope",
      "layer": "D_safety",
      "precision_class": "P5_computed"
    },
    "max_output_db_spl": {
      "description": "max output db spl",
      "layer": "I_electroacoustics",
      "precision_class": "P1_official"
    },
    "merchant_url": {
      "description": "merchant url",
      "layer": "X_affiliate",
      "precision_class": "P3_brand_page"
    },
    "merged_light": {
      "description": "merged light",
      "layer": "F_brand_risk",
      "precision_class": "P5_computed"
    },
    "mfi_listed": {
      "description": "mfi listed",
      "layer": "C_trace",
      "precision_class": "P2_platform"
    },
    "model": {
      "description": "model",
      "layer": "C_trace",
      "precision_class": "P3_brand_page"
    },
    "notes": {
      "description": "notes",
      "layer": "C_trace",
      "precision_class": "P3_brand_page"
    },
    "optional_care_plan_usd": {
      "description": "optional care plan usd",
      "layer": "G_tco",
      "precision_class": "P3_brand_page"
    },
    "orphan_risk": {
      "description": "orphan risk",
      "layer": "F_brand_risk",
      "precision_class": "P5_computed"
    },
    "own_bench_usability_reported": {
      "description": "own bench usability reported",
      "layer": "E_science",
      "precision_class": "P5_computed"
    },
    "platform_requirement": {
      "description": "platform requirement",
      "layer": "A_sound",
      "precision_class": "P5_computed"
    },
    "predicate_k_numbers": {
      "description": "predicate k numbers",
      "layer": "B_evidence",
      "precision_class": "P1_official"
    },
    "price_basis": {
      "description": "price basis",
      "layer": "C_trace",
      "precision_class": "P3_brand_page"
    },
    "price_date": {
      "description": "price date",
      "layer": "H_price_history",
      "precision_class": "P3_brand_page"
    },
    "price_history_current_usd": {
      "description": "price history current usd",
      "layer": "H_price_history",
      "precision_class": "P5_computed"
    },
    "price_history_max_usd": {
      "description": "price history max usd",
      "layer": "H_price_history",
      "precision_class": "P5_computed"
    },
    "price_history_min_usd": {
      "description": "price history min usd",
      "layer": "H_price_history",
      "precision_class": "P5_computed"
    },
    "price_history_n_snapshots": {
      "description": "price history n snapshots",
      "layer": "H_price_history",
      "precision_class": "P5_computed"
    },
    "price_history_noise_excluded": {
      "description": "price history noise excluded",
      "layer": "H_price_history",
      "precision_class": "P5_computed"
    },
    "price_pair_amazon_usd": {
      "description": "price pair amazon usd",
      "layer": "H_price_history",
      "precision_class": "P3_brand_page"
    },
    "price_pair_bestbuy_usd": {
      "description": "price pair bestbuy usd",
      "layer": "H_price_history",
      "precision_class": "P3_brand_page"
    },
    "price_pair_brand_usd": {
      "description": "price pair brand usd",
      "layer": "H_price_history",
      "precision_class": "P3_brand_page"
    },
    "price_pair_costco_usd": {
      "description": "price pair costco usd",
      "layer": "H_price_history",
      "precision_class": "P3_brand_page"
    },
    "price_pair_walmart_usd": {
      "description": "price pair walmart usd",
      "layer": "H_price_history",
      "precision_class": "P3_brand_page"
    },
    "price_per_point": {
      "description": "price per point",
      "layer": "A_sound",
      "precision_class": "P5_computed"
    },
    "professional_fitting_usd": {
      "description": "professional fitting usd",
      "layer": "G_tco",
      "precision_class": "P3_brand_page"
    },
    "rechargeable": {
      "description": "rechargeable",
      "layer": "C_trace",
      "precision_class": "P3_brand_page"
    },
    "red_flags_count": {
      "description": "red flags count",
      "layer": "F_brand_risk",
      "precision_class": "P5_computed"
    },
    "regulatory_path": {
      "description": "regulatory path",
      "layer": "B_evidence",
      "precision_class": "P1_official"
    },
    "release_year": {
      "description": "release year",
      "layer": "C_trace",
      "precision_class": "P3_brand_page"
    },
    "relies_on_predicate_clinical": {
      "description": "relies on predicate clinical",
      "layer": "E_science",
      "precision_class": "P1_official"
    },
    "remote_support_included": {
      "description": "remote support included",
      "layer": "G_tco",
      "precision_class": "P3_brand_page"
    },
    "required_app_version": {
      "description": "required app version",
      "layer": "F_brand_risk",
      "precision_class": "P3_brand_page"
    },
    "return_vs_support_gap_days": {
      "description": "return vs support gap days",
      "layer": "F_brand_risk",
      "precision_class": "P5_computed"
    },
    "return_window_days": {
      "description": "return window days",
      "layer": "G_tco",
      "precision_class": "P3_brand_page"
    },
    "risk_confidence": {
      "description": "risk confidence",
      "layer": "F_brand_risk",
      "precision_class": "P5_computed"
    },
    "self_fitting": {
      "description": "self fitting",
      "layer": "C_trace",
      "precision_class": "P3_brand_page"
    },
    "self_fitting_claim_source": {
      "description": "self fitting claim source",
      "layer": "B_evidence",
      "precision_class": "P1_official"
    },
    "soundscore_consistent": {
      "description": "soundscore consistent",
      "layer": "A_sound",
      "precision_class": "P5_computed"
    },
    "soundscore_date": {
      "description": "soundscore date",
      "layer": "A_sound",
      "precision_class": "P4_cited_lab"
    },
    "soundscore_fit_mode": {
      "description": "soundscore fit mode",
      "layer": "A_sound",
      "precision_class": "P5_computed"
    },
    "soundscore_grade": {
      "description": "soundscore grade",
      "layer": "A_sound",
      "precision_class": "P4_cited_lab"
    },
    "soundscore_headline_card": {
      "description": "soundscore headline card",
      "layer": "A_sound",
      "precision_class": "P4_cited_lab"
    },
    "soundscore_hearadvisor": {
      "description": "soundscore hearadvisor",
      "layer": "A_sound",
      "precision_class": "P4_cited_lab"
    },
    "soundscore_initial": {
      "description": "soundscore initial",
      "layer": "A_sound",
      "precision_class": "P4_cited_lab"
    },
    "soundscore_leaderboard": {
      "description": "soundscore leaderboard",
      "layer": "A_sound",
      "precision_class": "P4_cited_lab"
    },
    "soundscore_method_version": {
      "description": "soundscore method version",
      "layer": "A_sound",
      "precision_class": "P5_computed"
    },
    "soundscore_snapshot_date": {
      "description": "soundscore snapshot date",
      "layer": "A_sound",
      "precision_class": "P4_cited_lab"
    },
    "soundscore_source_page": {
      "description": "soundscore source page",
      "layer": "A_sound",
      "precision_class": "P4_cited_lab"
    },
    "soundscore_tuned": {
      "description": "soundscore tuned",
      "layer": "A_sound",
      "precision_class": "P4_cited_lab"
    },
    "soundscore_url": {
      "description": "soundscore url",
      "layer": "A_sound",
      "precision_class": "P4_cited_lab"
    },
    "soundscore_v0_csv": {
      "description": "soundscore v0 csv",
      "layer": "A_sound",
      "precision_class": "P4_cited_lab"
    },
    "stale_after": {
      "description": "stale after",
      "layer": "F_brand_risk",
      "precision_class": "P5_computed"
    },
    "status": {
      "description": "status",
      "layer": "F_brand_risk",
      "precision_class": "P3_brand_page"
    },
    "subscription_required": {
      "description": "subscription required",
      "layer": "G_tco",
      "precision_class": "P3_brand_page"
    },
    "subscription_usd_month": {
      "description": "subscription usd month",
      "layer": "G_tco",
      "precision_class": "P3_brand_page"
    },
    "subscription_what": {
      "description": "subscription what",
      "layer": "G_tco",
      "precision_class": "P3_brand_page"
    },
    "support_end_date": {
      "description": "support end date",
      "layer": "F_brand_risk",
      "precision_class": "P5_computed"
    },
    "tco_3y_high": {
      "description": "tco 3y high",
      "layer": "G_tco",
      "precision_class": "P5_computed"
    },
    "tco_3y_low": {
      "description": "tco 3y low",
      "layer": "G_tco",
      "precision_class": "P5_computed"
    },
    "tco_class": {
      "description": "tco class",
      "layer": "G_tco",
      "precision_class": "P5_computed"
    },
    "tco_imputation_flag": {
      "description": "tco imputation flag",
      "layer": "G_tco",
      "precision_class": "P5_computed"
    },
    "tco_per_point": {
      "description": "tco per point",
      "layer": "G_tco",
      "precision_class": "P5_computed"
    },
    "thd_percent": {
      "description": "thd percent",
      "layer": "I_electroacoustics",
      "precision_class": "P1_official"
    },
    "trustpilot_score": {
      "description": "trustpilot score",
      "layer": "F_brand_risk",
      "precision_class": "P2_platform"
    },
    "verified": {
      "description": "verified",
      "layer": "C_trace",
      "precision_class": "P3_brand_page"
    },
    "warranty_intake_end": {
      "description": "warranty intake end",
      "layer": "F_brand_risk",
      "precision_class": "P3_brand_page"
    },
    "warranty_months": {
      "description": "warranty months",
      "layer": "G_tco",
      "precision_class": "P3_brand_page"
    },
    "wax_guards_usd_year": {
      "description": "wax guards usd year",
      "layer": "G_tco",
      "precision_class": "P3_brand_page"
    }
  },
  "null_reasons": {
    "model_level_unavailable_brand_proxy_used": "Only a brand-level proxy was available; no model-level value is asserted.",
    "no_premarket_submission_required": "The published regulatory path requires no premarket submission; no model-linked submission is inferred.",
    "not_applicable": "The field or calculation does not apply to this model.",
    "not_found_after_search": "The frozen research pass did not find the value or mapping.",
    "not_published_by_brand": "The frozen brand material does not publish the value.",
    "not_scored_by_lab": "No cited laboratory score exists for the model in the frozen input.",
    "parser_failed": "A frozen parser observation exists but did not yield a reliable value.",
    "pending_snapshot": "A channel or price snapshot is not present in the frozen inputs."
  },
  "schema_version": "v1"
}