Restore NanoNFCorpus full qrels and rebuild candidates

README.md

@@ -209,7 +209,7 @@ dataset_info:
     num_bytes: 273956
     num_examples: 50
   - name: NanoNFCorpus
-    num_bytes: 300058
+    num_bytes: 300060
     num_examples: 50
   - name: NanoNQ
     num_bytes: 335164
@@ -353,8 +353,8 @@ dataset_info:
     num_bytes: 1065
     num_examples: 50
   - name: NanoNFCorpus
-    num_bytes: 42309
-    num_examples: 1651
+    num_bytes: 64851
+    num_examples: 2518
   - name: NanoNQ
     num_bytes: 1340
     num_examples: 57
@@ -449,7 +449,7 @@ dataset_info:
     num_bytes: 55213
     num_examples: 50
   - name: NanoNFCorpus
-    num_bytes: 60461
+    num_bytes: 60437
     num_examples: 50
   - name: NanoNQ
     num_bytes: 67874
@@ -500,15 +500,15 @@ This dataset uses six Hugging Face Datasets configs:
 - `harrier_oss_v1_270m`: dense candidate lists from `microsoft/harrier-oss-v1-270m`
 - `reranking_hybrid`: RRF candidate lists built from `bm25` and `harrier_oss_v1_270m`
 
-Each config has the same Nano split names.
+Each config has the same Nano split names. `NanoNFCorpus` includes the full positive qrels (2,518 rows); qrels are not capped to the top-100 reranking depth.
 
 ## Candidate Construction
 
-- `bm25`: local BM25 top-500 with automatic language-aware tokenization. The resolved tokenizer is shown in the Candidate Quality table, for example `wordseg@ja`.
+- `bm25`: local BM25 top-500 with automatic tokenizer selection. Auto mode uses `wordseg` for `ja`, `zh`, `th`, `ko`, and `vi`, and `regex` otherwise. The resolved tokenizer is shown for each split in the Candidate Quality table.
 - `harrier_oss_v1_270m`: dense top-500 from `microsoft/harrier-oss-v1-270m`. In tables this is shown as `Dense`; Dense means `microsoft/harrier-oss-v1-270m` with the `web_search_query` prompt for queries and cosine similarity over normalized embeddings.
 - `reranking_hybrid`: RRF over `bm25` and `harrier_oss_v1_270m` using `rrf_k=100`, keeping the RRF top-100.
 
-Safeguard means rank 101 is appended only when RRF top-100 contains no qrels-positive document.
+Safeguard means rank 101 is appended only when RRF top-100 contains no qrels-positive document. Qrels are not capped to fit the top-100 reranking depth. For `NanoNFCorpus`, some queries have more than 100 positive qrels, so top-100 hybrid candidate coverage is expected to be below 100%; this is a candidate-list diagnostic, not a qrels filtering rule.
 
 ## Split Statistics
 
@@ -523,7 +523,7 @@ Length statistics are character counts computed with `len(str(text))`.
 | NanoFiQA2018 | 50 | 4598 | 123 | 63.8 | 60.5 | 80.2 | 914.4 | 661.0 | 1159.8 |
 | NanoHotpotQA | 50 | 5090 | 100 | 86.5 | 75.5 | 105.0 | 353.6 | 306.0 | 486.0 |
 | NanoMSMARCO | 50 | 5043 | 50 | 35.6 | 32.0 | 43.8 | 331.1 | 300.0 | 382.0 |
-| NanoNFCorpus | 50 | 2953 | 1651 | 23.1 | 20.0 | 33.5 | 1522.7 | 1540.0 | 1791.0 |
+| NanoNFCorpus | 50 | 2953 | 2518 | 23.1 | 20.0 | 33.5 | 1522.7 | 1540.0 | 1791.0 |
 | NanoNQ | 50 | 5035 | 57 | 45.6 | 44.5 | 53.8 | 514.5 | 436.0 | 738.5 |
 | NanoQuoraRetrieval | 50 | 5046 | 70 | 49.3 | 45.0 | 54.8 | 58.1 | 49.0 | 67.0 |
 | NanoSCIDOCS | 50 | 2210 | 244 | 77.1 | 74.0 | 89.5 | 944.5 | 919.0 | 1236.5 |
@@ -538,7 +538,7 @@ Dense means `microsoft/harrier-oss-v1-270m` with the `web_search_query` prompt a
 
 | Nano split | BM25 tokenizer | BM25 nDCG@10 | Dense nDCG@10 | Hybrid nDCG@10 | BM25 Recall@100 | Dense Recall@100 | Hybrid Recall@100 | Hybrid candidates | Safeguard positives |
 |---|---|---:|---:|---:|---:|---:|---:|---:|---:|
-| Mean | - | 39.46 | 50.31 | 48.41 | 68.65 | 77.66 | 79.05 | - | 40 |
+| Mean | - | 39.59 | 50.50 | 48.68 | 68.68 | 77.67 | 79.21 | - | 38 |
 | NanoArguAna | regex | 28.17 | 41.87 | 36.25 | 84.00 | 94.00 | 96.00 | 100-101 | 2 |
 | NanoClimateFEVER | regex | 23.89 | 29.46 | 32.66 | 60.10 | 61.47 | 66.40 | 100-101 | 2 |
 | NanoDBPedia | english_porter_stop | 47.04 | 56.93 | 55.67 | 59.82 | 75.27 | 74.97 | 100 | 0 |
@@ -546,7 +546,7 @@ Dense means `microsoft/harrier-oss-v1-270m` with the `web_search_query` prompt a
 | NanoFiQA2018 | regex | 19.04 | 30.94 | 31.83 | 49.02 | 67.88 | 65.31 | 100-101 | 10 |
 | NanoHotpotQA | regex | 63.27 | 75.16 | 74.14 | 87.00 | 95.00 | 96.00 | 100 | 0 |
 | NanoMSMARCO | regex | 28.33 | 45.41 | 40.72 | 76.00 | 92.00 | 90.00 | 100-101 | 5 |
-| NanoNFCorpus | regex | 16.02 | 21.65 | 19.54 | 11.98 | 18.73 | 18.78 | 100-101 | 11 |
+| NanoNFCorpus | regex@regex | 17.76 | 24.11 | 23.01 | 12.30 | 18.76 | 20.87 | 100-101 | 9 |
 | NanoNQ | regex | 26.24 | 53.43 | 42.28 | 76.00 | 88.00 | 92.00 | 100-101 | 3 |
 | NanoQuoraRetrieval | regex | 58.37 | 81.00 | 71.29 | 93.60 | 96.00 | 97.33 | 100-101 | 1 |
 | NanoSCIDOCS | regex | 25.61 | 33.82 | 32.29 | 48.47 | 62.13 | 63.17 | 100-101 | 1 |
@@ -555,7 +555,7 @@ Dense means `microsoft/harrier-oss-v1-270m` with the `web_search_query` prompt a
 
 ## Hybrid Safeguard Summary
 
-- Safeguard positives: 40
+- Safeguard positives: 38
 - Rows limited by corpus size: 0
 - Metadata file: `reranking_hybrid_metadata.json`
 

bm25/NanoNFCorpus-00000-of-00001.parquet

@@ -1,3 +1,3 @@
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manifest.json

@@ -76,9 +76,9 @@
       "split_name": "NanoNFCorpus",
       "queries": 50,
       "corpus": 2953,
-      "qrels": 1651,
-      "forced_doc_count": 1498,
-      "bm25_ndcg_at_10": 0.2342336215523191,
+      "qrels": 2518,
+      "forced_doc_count": 1948,
+      "bm25_ndcg_at_10": 0.17764347669629224,
       "bm25_query_coverage": 1.0,
       "bm25_relevant_coverage": 1.0
     },

metadata/NanoNFCorpus.json

@@ -2,12 +2,14 @@
   "split_name": "NanoNFCorpus",
   "queries": 50,
   "corpus": 2953,
-  "qrels": 1651,
+  "qrels": 2518,
   "source_non_positive_qrels": 0,
   "qrels_selection": {
-    "qrels_per_query_cap": 100,
-    "removed_qrels_over_cap": 0,
-    "qrels_cap_policy": "positive qrels are capped per query to the BM25 candidate top_k"
+    "qrels_policy": "full positive qrels preserved",
+    "restored_qrels_from": "sentence-transformers/NanoBEIR-en@beb106fbcfaa599c508c667041bf8c85fd78736b",
+    "previous_hakari_qrels": 1651,
+    "restored_qrels": 867,
+    "max_positive_qrels_per_query": 463
   },
   "bm25": {
     "config": {
@@ -17,10 +19,10 @@
       "tokenizer": "regex",
       "tokenizer_name": null,
       "stemmer_algorithm": "english",
-      "top_k": 100,
+      "top_k": 500,
       "k1": 1.5,
       "b": 0.75,
-      "show_progress": true,
+      "show_progress": false,
       "auto_selected": true,
       "auto_detected_language": "sh",
       "auto_detection_language_counts": {
@@ -33,21 +35,55 @@
       },
       "auto_detection_sample_size": 10
     },
-    "ndcg_at_10": 0.2342336215523191,
+    "ndcg_at_10": 0.17764347669629224,
+    "recall_at_100": 0.12298699330397568,
     "candidate_coverage": {
-      "top_k": 100,
+      "top_k": 500,
       "query_count": 50,
       "query_with_relevance_count": 50,
       "covered_query_count": 50,
       "query_coverage": 1.0,
-      "relevant_count": 1651,
-      "covered_relevant_count": 1651,
+      "relevant_count": 2518,
+      "covered_relevant_count": 2518,
       "relevant_coverage": 1.0
     },
-    "rebuild_policy": "BM25 candidates were recomputed locally and qrels-positive documents missing from the raw top-k were forced into the final candidate list.",
-    "forced_queries": 49,
-    "forced_doc_count": 1498,
+    "rebuild_policy": "BM25 top-500 was recomputed locally; full qrels were preserved; qrels-positive documents were forced into the top-500 candidate list when missing.",
+    "forced_queries": 47,
+    "forced_doc_count": 1948,
     "missing_positive_doc_count_after_forcing": 0,
-    "rebuilt_at_utc": "2026-05-19T01:35:08.867903+00:00"
+    "rebuilt_at_utc": "2026-06-07T22:41:30.401331+00:00"
+  },
+  "harrier_oss_v1_270m": {
+    "source": "copied from current hakari-bench dataset; dense top-500 is qrels-independent",
+    "ndcg_at_10": 0.24105976427444703,
+    "recall_at_100": 0.18763592765728906,
+    "candidate_coverage": {
+      "top_k": 500,
+      "query_count": 50,
+      "query_with_relevance_count": 50,
+      "covered_query_count": 47,
+      "query_coverage": 0.94,
+      "relevant_count": 2518,
+      "covered_relevant_count": 802,
+      "relevant_coverage": 0.31850675138999207
+    }
+  },
+  "reranking_hybrid": {
+    "source": "rebuilt from BM25 top-500 and harrier_oss_v1_270m top-500 with RRF",
+    "rrf_k": 100,
+    "top_k": 100,
+    "ndcg_at_10": 0.23009498171751613,
+    "recall_at_100": 0.20870425429465364,
+    "candidate_coverage": {
+      "top_k": 100,
+      "query_count": 50,
+      "query_with_relevance_count": 50,
+      "covered_query_count": 41,
+      "query_coverage": 0.82,
+      "relevant_count": 2518,
+      "covered_relevant_count": 387,
+      "relevant_coverage": 0.15369340746624305
+    },
+    "safeguard_positive_count": 9
   }
 }

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