ViCivil-TKG v1.2.3 — Vietnamese Civil Law Temporal Knowledge Graph

Article-granularity temporal KG of 17 Vietnamese civil-law texts (1996-2026, BLDS 1995/2005/2015 included) with a 281-question situational benchmark, decontaminated extraction, and an 8-file ADGR-style retrieval index.

What is inside

folder	content
data/	11.267 chunk rows (law Dieu/Khoan/Diem/Muc granularity; per-row source_type + cleaned flag), v10 frozen backup, decontaminated LLM extraction (11.267/11.267 done, zero CJK/PUA glyphs by gate)
benchmark/	281 situational Qs with gold chunk ids + gold_tier (245 verified / 32 regolded / 4 author-verified incl. provenance fields), per-question ranks, double-rater + regold trail, 50-Q expert review package
index/	dense matrices (768-d, embeddinggemma:300m, L2-normed) for 14.099 entities / 20.750 relation rows (20.311 in-corpus incl. DAN-CHIEU refs + 439 cross-version successor edges, sim>=0.90) + kv chunk maps
provenance/	temporal graph (17 law windows + 21 amendment/succession edges), 1.506 CITE edges, lineage candidates with similarity (0.80-0.90 band kept for audit), source audit, ablation + significance + faithfulness + index-stats artifacts
sources_official/	5 signed Cong-bao PDFs (BLDS 1995/2005/2015, HNGD 2000, TNBTCNN 2017) used to verify the corpus — raw archive files, intentionally not declared as viewer configs (PDF is not indexable by the dataset viewer)

Metrics (v1.2.3 frozen)

Hybrid retriever + rerank + temporal filter, n=281: Hit@1 0.452 / Hit@3 0.658 / Hit@5 0.726 / Hit@10 0.794, MRR 0.568. Stratified: verified 245 -> 0.502/0.678/0.731/0.796; regolded 32 -> 0.062/0.531/0.719/0.812; author-verified 4 -> 0.5/0.5/0.5/0.5. Abstain: 2/2 (1990 empty pool + missing-law probes).

How gold labels were made (protocol)

1. Chunk-level generation with 8B open model + junk filters (production prompts, not leaked eval text; no target law content was ever shown).
2. Two-rater hostility audit: qwen 8B full bench, qwen2.5 14B on the 120 doubtfuls; 57 rejects -> 16 gold re-anchors with provenance (regolded_from).
3. Adjudication by authors for weak/partial labels -> rescoped questions (question_rescoped_from), 4 verified stubs, 1 documented drop (dropped_log.json). No gold without an audit trail.

Known limitations (disclosed, not hidden)

• Expert review of 50 sampled items pending (benchmark/review_package_50.md); until then treat gold as LLM+author adjudicated.
• ~500 item-level chunks have empty extractions (numbered-item granularity).
• 603 near-duplicate groups (557 spanning more than one law; identical statutory wording); measured top-5 collision impact: 10/281 questions; retrieval-time dedup rejected (rank-distorting).
• 2 NCN2010 chunks rebuilt from the same official government .doc via a full piece-table parser (the source file's piece records were damaged).
• Remaining article-numbering gaps (measured in provenance/law_audit.json): HNGD2000 3/110, THADS-VBHN 5/190, VBHN-21 Dieu 497, Law 15/2026 44 items; BLDS 1995 has zero gaps since its clause-level rebuild. Index stores [:3000] char representation (full text in data/civil_chunks.jsonl); 1 duplicate question text across two qids (CIV001/CIV002).
• Not legal advice. Vietnamese source-frame only (English mirror comes later).

How to load

from huggingface_hub import snapshot_download
p = snapshot_download("datbazuka2502/vicivil-tkg", repo_type="dataset")
import json
chunks = [json.loads(l) for l in open(f"{p}/data/civil_chunks.jsonl")]
bench = json.load(open(f"{p}/benchmark/law_bench_200c.json"))

Index files need law_adgr.py (ADGR-style LawRetriever) — shipped in the paper repo. All released files passed a 12-section audit before upload (manifest completeness, JSON parse-all, matrix shapes, gold chain, extraction coverage, secret scan, schema fields, duplicate accounting, law-window sanity, kv refs, weird-character gate, id-set equality).

License & attribution

• Legal texts: public domain (Luật 104/2016/QH13; Luật 64/2025/QH15).
• Curation (schema, IDs, benchmark): CC-BY-4.0 — cite as:

@misc{viciviltkg2026,
  title  = {ViCivil-TKG: A Temporal Knowledge Graph and Benchmark for
            Vietnamese Civil Law Retrieval},
  author = {ntd25022006q},
  year   = {2026},
  url    = {https://huggingface.co/datasets/datbazuka2502/vicivil-tkg}
}