Keep stable paper identities separate from ambiguous title matches

.gitea/workflows/check.yml

@@ -53,7 +53,6 @@ jobs:
               subprocess.run([python,'-I','-B','-m','paper_atlas','import','arxiv','--help'],cwd=outside,check=True)
               subprocess.run([python,'-I','-B','-m','paper_atlas','maintain','backfill','--help'],cwd=outside,check=True)
               subprocess.run([python,'-I','-B','-m','paper_atlas','audit','public-openreview','--help'],cwd=outside,check=True)
-              subprocess.run([python,'-I','-B','-m','paper_atlas','coverage','--help'],cwd=outside,check=True)
               subprocess.run([python,'-I','-B','-m','paper_atlas','audit','histories','--help'],cwd=outside,check=True)
               subprocess.run([python,'-I','-B','-c','from paper_atlas.postgres.writer import PostgresStore, WriteConnection'],cwd=outside,check=True)
               smoke = "from paper_atlas.db.store import Store; from paper_atlas.config import DEFAULT_REGISTRY; import json; assert {'COLM','MM','MLSys'} <= {v['acronym'] for v in json.loads(DEFAULT_REGISTRY.read_text())['venues']}; s=Store('installed.sqlite'); s.conn.close()"

README.md

@@ -51,8 +51,7 @@ PGSERVICEFILE=/etc/paper-atlas/pg_service.conf paper-atlas query --pg-service fo
 PGSERVICEFILE=/etc/paper-atlas/pg_service.conf paper-atlas query --pg-service foundry-research --paper 123
 
 # 列出全部目标会议，包括尚未入库的项目
-PGSERVICEFILE=/etc/paper-atlas/pg_service.conf paper-atlas coverage \
-  --pg-service foundry-research --pg-schema research \
+paper-atlas coverage --db /data/paper-index/papers.sqlite \
   --out /data/paper-index/collected/venue-coverage-current.json
 
 # 采集与导入分开；这里只采集到独立文件

docs/operations.md

@@ -97,16 +97,13 @@ paper-atlas audit arxiv-tags --db /data/paper-index/papers.sqlite \
 采集文件、已入库的来源记录和去重论文实体是不同的计数。来源可能覆盖同一篇论文，同一篇论文也可能有多次投稿；不能把各批文件数量相加作为独立论文总数。实时统计与覆盖报告使用：
 
 ```sh
-PGSERVICEFILE=/etc/paper-atlas/pg_service.conf paper-atlas query --pg-service foundry-research --pg-schema research --stats
-PGSERVICEFILE=/etc/paper-atlas/pg_service.conf paper-atlas coverage \
-  --pg-service foundry-research --pg-schema research \
+paper-atlas query --db /data/paper-index/papers.sqlite --stats
+paper-atlas coverage --db /data/paper-index/papers.sqlite \
   --out /data/paper-index/collected/venue-coverage-current.json
 ```
 
 manifest 和采集器状态清单用于确认文件是否齐全及是否缺摘要；`ingest_runs` 和协调器日志用于确认主库导入是否成功。官方程序、书目目录和公开投稿快照分别保留，未出现在某份清单不等于被拒稿；第三方快照也不能代表平台当前全量状态。代码测试成功不能代替最终全库去重、完整性和逐届覆盖核验。
 
-`coverage` 的所有计数来自同一个只读快照。`latest_observed_status_counts` 按每次投稿的最新观察决定统计，`decision_observation_counts` 保留所有历史观察；重复来源不增加投稿数，缺少决定的投稿计入最新状态 unknown，但不凭空制造 unknown 决定。`source_record_counts` 统计来源在该届次的实际记录与缺摘要数，和 `sources` 中逐清单的预期/导入数量分开；身份补充清单与原始论文集清单可以描述同一条记录。来源缺摘要与论文实体从其他来源获得摘要也分别报告。报告仍将历史覆盖标为待独立审计，不能用某个清单 complete 或没有拒稿记录推断全会议覆盖。
-
 当前代码与合并状态以 [Pull Requests](https://gitea.entroia.com/Zayden-Jung/paper-atlas/pulls) 为准；CI 结果以对应提交的 Actions 检查为准。工作分支交付后等待用户手动合并。合并代码不自动部署、不自动启动采集，也不代表数据批次已完成。
 ## 修正已有 PMLR 投稿的轨道
 

docs/usage.md

@@ -83,14 +83,11 @@ paper-atlas query --pg-service foundry-research --query '"language model"' --lim
 paper-atlas query --pg-service foundry-research --tag arxiv:category=cs.AI
 paper-atlas query --pg-service foundry-research --venue ICLR --year 2025 --status rejected
 paper-atlas query --pg-service foundry-research --paper 123
-PGSERVICEFILE=/etc/paper-atlas/pg_service.conf paper-atlas coverage \
-  --pg-service foundry-research --pg-schema research --out /data/paper-index/collected/coverage.json
+paper-atlas coverage --db /data/paper-index/papers.sqlite --out /data/paper-index/collected/coverage.json
 ```
 
 `--status rejected` 筛选某次投稿的最新已知决定。它并不表示论文在所有会议均未录用；分析转投情况时查看该论文的完整投稿历史。年份表示会议届次，观察时间和决定日期分别保留。
 
-覆盖报告使用只读一致性快照，标明实际数据库和 schema，并列出零入库目标与注册表外的已入库会议。逐届、逐 track 分别列出最新观察状态的投稿数、全部决定观察数、各来源记录数，以及来源摘要和论文实体摘要的缺失数。摘要缺失指 NULL 或空字符串；有文字不代表内容已经完整核验。同一来源的多个清单 URL 可以重叠，不能把清单计数相加当作来源总量；零条拒稿也不证明该会议没有公开拒稿。SQLite 样本仍可显式使用 `--db`，生产报告应查询当前 PostgreSQL。
-
 例如，查找在 ICLR 有拒稿记录、但在其他已知投稿中已有录用的论文：
 
 ```sh
@@ -102,6 +99,8 @@ paper-atlas query --pg-service foundry-research \
 
 `--stats` 中 papers 是当前规则下的论文实体数；source_records 是来源记录数；decisions 是决定观察数。一个投稿可能有多个来源和多条观察，不能相加当作论文数。
 
+已有稳定标识或原来源记录匹配时，该身份优先；同标题、同作者的另一 arXiv 存档或扩展稿不会仅因相似标题被并入。没有身份锚点时，作者佐证的精确标题只有一个候选才可匹配；多个候选会报 `Ambiguous paper identity`，整个采集文件回滚并记录失败运行。应补有证据的标识或先核查版本关系，不删除重复候选或任取第一个。一个新来源明确同时携带两个既有稳定标识时，仍可按既有规则归并并保留投稿、标签和合并日志；未归并的同标题关系继续保留为待核查候选。这些规则不证明全库去重完成。
+
 ## 5. 投稿历史关系审计
 
 ```sh

paper_atlas/audits/coverage.py

@@ -1,136 +1,45 @@
-"""Describe imported venue coverage without implying a complete census."""
+"""Show every target venue, including those with no imported records."""
 import argparse
-from collections import defaultdict
+from paper_atlas.config import DEFAULT_REGISTRY
 import json
 from pathlib import Path
 import sqlite3
 
-from paper_atlas.config import DEFAULT_REGISTRY
-from paper_atlas.db.backend import database_arguments, open_read_connection
 from paper_atlas.db.submissions import timestamp
-from paper_atlas.querying import LATEST_DECISION
 
 
-STATUSES = ('accepted', 'rejected', 'desk_rejected', 'withdrawn', 'under_review', 'unknown')
-
-
-def _status_counts(connection, *, latest):
-    if latest:
-        query = '''SELECT s.edition_id,COALESCE(d.status,'unknown') AS status,count(*) AS count
-            FROM submissions s LEFT JOIN decisions d ON d.submission_id=s.id AND ''' + LATEST_DECISION
-    else:
-        query = '''SELECT s.edition_id,COALESCE(d.status,'unknown') AS status,count(*) AS count
-            FROM submissions s JOIN decisions d ON d.submission_id=s.id'''
-    counts = defaultdict(dict)
-    for row in connection.execute(query + " GROUP BY s.edition_id,COALESCE(d.status,'unknown')"):
-        counts[row[0]][row[1]] = row[2]
-    return counts
-
-
-def report(db, registry, *, pg_service=None, pg_schema=None):
-    started_at = timestamp()
-    registry = json.loads(Path(registry).read_text())
-    targets = registry['venues']
-    names = [row['acronym'].casefold() for row in targets]
-    if len(names) != len(set(names)):
-        raise ValueError('Duplicate target venue')
-    scope = '''(lower(v.acronym)=lower(?) OR EXISTS(
-        SELECT 1 FROM venue_aliases a WHERE a.venue_id=v.id AND lower(a.alias)=lower(?)))'''
-    connection = open_read_connection(db, pg_service=pg_service, pg_schema=pg_schema)
-    if not pg_service:
-        connection.row_factory = sqlite3.Row
+def report(db,registry):
+    registry=json.loads(Path(registry).read_text());targets=registry['venues']
+    names=[row['acronym'].casefold() for row in targets]
+    if len(names)!=len(set(names)):raise ValueError('Duplicate target venue')
+    scope='(v.acronym=? COLLATE NOCASE OR EXISTS(SELECT 1 FROM venue_aliases a WHERE a.venue_id=v.id AND a.alias=? COLLATE NOCASE))'
+    c=sqlite3.connect(Path(db).resolve().as_uri()+'?mode=ro',uri=True);c.row_factory=sqlite3.Row
     try:
-        if pg_service:
-            identity = connection.execute('SELECT current_database(),current_schema()').fetchone()
-            database, schema = identity[0], identity[1]
-        else:
-            database, schema = str(Path(db).resolve()), None
-        latest = _status_counts(connection, latest=True)
-        observations = _status_counts(connection, latest=False)
-        # Aggregate the paper join once for the whole snapshot. Repeating it
-        # for each registry target caused repeated scans on the production DB.
-        edition_counts = {}
-        for row in connection.execute('''SELECT s.edition_id,count(s.id) AS submissions,
-                count(DISTINCT s.paper_id) AS papers,
-                count(DISTINCT CASE WHEN p.abstract IS NULL OR p.abstract='' THEN s.paper_id END)
-                    AS papers_without_abstract_text
-                FROM submissions s LEFT JOIN papers p ON p.id=s.paper_id GROUP BY s.edition_id'''):
-            entry = dict(row)
-            edition_counts[entry.pop('edition_id')] = entry
-        source_counts = defaultdict(list)
-        for row in connection.execute('''SELECT s.edition_id,so.name AS source,
-                count(DISTINCT sr.id) AS source_records,
-                count(DISTINCT CASE WHEN sr.abstract IS NULL OR sr.abstract='' THEN sr.id END)
-                    AS source_records_without_abstract_text
-                FROM submission_sources ss JOIN submissions s ON s.id=ss.submission_id
-                JOIN source_records sr ON sr.id=ss.source_record_id JOIN sources so ON so.id=sr.source_id
-                GROUP BY s.edition_id,so.name ORDER BY s.edition_id,so.name'''):
-            entry = dict(row)
-            source_counts[entry.pop('edition_id')].append(entry)
-        venues, covered_venue_ids = [], set()
+        c.execute('BEGIN');venues=[]
         for target in targets:
-            acronym = target['acronym']
-            params = (acronym, acronym)
-            editions = []
-            for row in connection.execute('''SELECT e.id,v.id AS venue_id,v.acronym AS canonical_venue,
-                    e.year,e.track FROM editions e JOIN venues v ON v.id=e.venue_id
-                    WHERE ''' + scope + '''
-                    ORDER BY e.year,e.track,v.acronym''', params):
-                edition = dict(row)
-                edition.update(edition_counts.get(row['id'], {
-                    'submissions': 0, 'papers': 0, 'papers_without_abstract_text': 0}))
-                covered_venue_ids.add(edition['venue_id'])
-                edition['latest_observed_status_counts'] = {status: latest[row['id']].get(status, 0) for status in STATUSES}
-                edition['decision_observation_counts'] = {status: observations[row['id']].get(status, 0) for status in STATUSES}
-                edition['source_record_counts'] = source_counts[row['id']]
-                edition['sources'] = [dict(source) for source in connection.execute('''SELECT so.name,
-                    es.status,es.expected_count,es.imported_count,es.list_url,es.last_success_at,es.last_error
-                    FROM edition_sources es JOIN sources so ON so.id=es.source_id
-                    WHERE es.edition_id=? ORDER BY so.name,es.list_url''', (row['id'],))]
+            acronym=target['acronym'];params=(acronym,acronym)
+            editions=[]
+            for row in c.execute('SELECT e.id,v.acronym AS canonical_venue,e.year,e.track,count(s.id) AS submissions,count(DISTINCT s.paper_id) AS papers FROM editions e JOIN venues v ON v.id=e.venue_id LEFT JOIN submissions s ON s.edition_id=e.id WHERE '+scope+' GROUP BY e.id ORDER BY e.year,e.track',params):
+                edition=dict(row)
+                edition['sources']=[dict(source) for source in c.execute('SELECT so.name,es.status,es.expected_count,es.imported_count,es.list_url,es.last_success_at,es.last_error FROM edition_sources es JOIN sources so ON so.id=es.source_id WHERE es.edition_id=? ORDER BY so.name',(row['id'],))]
                 editions.append(edition)
-            totals = connection.execute('''SELECT count(s.id),count(DISTINCT s.paper_id)
-                FROM submissions s JOIN editions e ON e.id=s.edition_id
-                JOIN venues v ON v.id=e.venue_id WHERE ''' + scope, params).fetchone()
-            venues.append({'acronym': acronym, 'field': target['field'],
-                'imported_submissions': totals[0], 'distinct_papers': totals[1],
-                'history_status': 'partial_history_pending_independent_audit' if totals[0] else 'no_imported_records',
-                'discovery_sources': target.get('discovery_sources', []), 'editions': editions})
-        outside_registry = [dict(row) for row in connection.execute('''SELECT v.id AS venue_id,
-            v.acronym,count(s.id) AS submissions,count(DISTINCT s.paper_id) AS papers
-            FROM submissions s JOIN editions e ON e.id=s.edition_id JOIN venues v ON v.id=e.venue_id
-            GROUP BY v.id,v.acronym ORDER BY v.acronym''') if row[0] not in covered_venue_ids]
-        return {'report_started_at': started_at, 'checked_at': timestamp(),
-            'engine': 'postgresql' if pg_service else 'sqlite', 'database': database, 'schema': schema,
-            'pg_service': pg_service, 'target_venue_count': len(targets),
-            'venues_with_imported_records': sum(bool(v['imported_submissions']) for v in venues),
-            'scope_note': registry['scope_note'],
-            'interpretation': 'All registry targets are listed, including zero imports. '
-                'Latest status counts use the latest observed decision for each attempt; decision observations retain history. '
-                'Source record totals are per source and edition, not per list URL; multiple list entries may describe overlapping records. '
-                'Missing abstract text means NULL or empty string; nonempty text does not prove a complete abstract. '
-                'An edition source marked complete is not a proof of complete conference history or public rejection coverage. '
-                'Zero imported rejections does not establish that no rejections are public. '
-                'Papers can appear in several venues/years; do not sum venue paper counts as a global total.',
-            'venues': venues, 'imported_venues_outside_registry': outside_registry}
-    finally:
-        connection.close()
+            totals=c.execute('SELECT count(s.id),count(DISTINCT s.paper_id) FROM submissions s JOIN editions e ON e.id=s.edition_id JOIN venues v ON v.id=e.venue_id WHERE '+scope,params).fetchone()
+            venues.append({'acronym':acronym,'field':target['field'],'imported_submissions':totals[0],'distinct_papers':totals[1],
+                           'history_status':'partial_history_pending_independent_audit' if totals[0] else 'no_imported_records',
+                           'discovery_sources':target.get('discovery_sources',[]),'editions':editions})
+        return {'checked_at':timestamp(),'target_venue_count':len(targets),'venues_with_imported_records':sum(bool(v['imported_submissions']) for v in venues),
+                'scope_note':registry['scope_note'],'interpretation':'All registry targets are listed. Edition source complete means that source file passed import checks; it does not prove full historical or abstract coverage. Papers can appear in multiple venues/years, so do not sum venue paper counts as a global total.',
+                'venues':venues}
+    finally:c.close()
 
 
 def main(argv=None, *, prog=None):
-    parser = argparse.ArgumentParser(prog=prog)
-    database_arguments(parser)
-    parser.add_argument('--registry', default=str(DEFAULT_REGISTRY))
-    parser.add_argument('--out')
-    args = parser.parse_args(argv)
-    result = report(args.db, args.registry, pg_service=args.pg_service, pg_schema=args.pg_schema)
-    text = json.dumps(result, ensure_ascii=False, indent=2)
+    parser=argparse.ArgumentParser(prog=prog);parser.add_argument('--db',required=True)
+    parser.add_argument('--registry',default=str(DEFAULT_REGISTRY));parser.add_argument('--out')
+    args=parser.parse_args(argv);result=report(args.db,args.registry);text=json.dumps(result,ensure_ascii=False,indent=2)
     if args.out:
-        path = Path(args.out)
-        stage = path.with_suffix('.part')
-        stage.write_text(text + '\n')
-        stage.replace(path)
-    else:
-        print(text)
+        path=Path(args.out);stage=path.with_suffix('.part');stage.write_text(text+'\n');stage.replace(path)
+    else:print(text)
 
 
 if __name__ == '__main__':

paper_atlas/db/store.py

@@ -95,13 +95,19 @@ class Store:
             matches.add(old[0])
         key = normalized(title)
         title_matches = c.execute('SELECT id,authors_json,abstract FROM papers WHERE title_key=?',(key,)).fetchall()
-        authors_set = author_keys(authors)
-        for paper,old_authors,old_abstract in title_matches:
-            overlap = authors_set & author_keys(json.loads(old_authors))
-            # Cross-platform title matching needs independent author corroboration.
-            same_source = c.execute('SELECT 1 FROM source_records WHERE paper_id=? AND source_id=? LIMIT 1',(paper,source_id)).fetchone()
-            if not same_source and len(key)>=25 and (len(overlap)>=2 or (overlap and abstract and abstract.strip()==(old_abstract or '').strip())):
-                matches.add(paper)
+        # An existing identifier/source record anchors the entity. Title
+        # similarity must not pull in another deposit or an extended version.
+        if not matches:
+            title_only_matches = set()
+            authors_set = author_keys(authors)
+            for paper,old_authors,old_abstract in title_matches:
+                overlap = authors_set & author_keys(json.loads(old_authors))
+                same_source = c.execute('SELECT 1 FROM source_records WHERE paper_id=? AND source_id=? LIMIT 1',(paper,source_id)).fetchone()
+                if not same_source and len(key)>=25 and (len(overlap)>=2 or (overlap and abstract and abstract.strip()==(old_abstract or '').strip())):
+                    title_only_matches.add(paper)
+            if len(title_only_matches)>1:
+                raise ValueError('Ambiguous paper identity: multiple author-corroborated title matches; provide verified identifiers')
+            matches = title_only_matches
         if matches:
             paper = min(matches)
             for other in sorted(matches-{paper}):

tests/test_coverage_report.py

@@ -7,34 +7,6 @@ from paper_atlas.audits.coverage import report
 from paper_atlas.db.store import Store
 
 
-def add_coverage_evidence(store):
-    paper, record = store.record('official_metadata', 'known', 'https://example.org/known',
-        'Known paper with two source observations', 'Complete canonical abstract', ['Jane Doe', 'John Smith'],
-        {'openreview': 'coverageForum', 'arxiv': '2401.98765'})
-    edition = store.decision(paper, record, 'COLING+LREC', 2024, 'main', 'known',
-        'https://example.org/accept', 'accepted', 'Accept', aliases=['COLING', 'LREC'],
-        identities=[('openreview', 'coverageForum')], observed_at='2025-05-01T00:00:00Z')
-    same, mirror = store.record('bibliography', 'mirror', 'https://example.org/mirror',
-        'Known paper with two source observations', None, ['Jane Doe', 'John Smith'], {'openreview': 'coverageForum'})
-    store.decision(same, mirror, 'COLING+LREC', 2024, 'main', 'mirror', 'https://example.org/older',
-        'rejected', 'Reject', identities=[('openreview', 'coverageForum')],
-        observed_at='2025-05-01T00:00:00Z', decision_date='2025-04-30T00:00:00Z')
-    unknown, unknown_record = store.record('unknown_catalogue', 'unknown', 'https://example.org/unknown',
-        'Indexed work without a public decision', None, [])
-    store.decision(unknown, unknown_record, 'COLING+LREC', 2024, 'main', 'unknown',
-        'https://example.org/unknown', None, '', identities=[('openreview', 'unknownForum')])
-    same, later = store.record('official_metadata', 'later', 'https://example.org/later',
-        'Known paper with two source observations', 'Complete canonical abstract', ['Jane Doe', 'John Smith'],
-        {'openreview': 'coverageNext', 'arxiv': '2401.98765'})
-    store.decision(same, later, 'COLING+LREC', 2025, 'findings', 'later', 'https://example.org/later',
-        'accepted', 'Accept', identities=[('openreview', 'coverageNext')], observed_at='2025-06-01T00:00:00Z')
-    source = store.source('official_metadata', 'https://example.org')
-    for url, status in [('https://example.org/list', 'complete'), ('https://example.org/identity-refresh', 'partial')]:
-        store.conn.execute('''INSERT INTO edition_sources(edition_id,source_id,list_url,status,expected_count,imported_count)
-            VALUES(?,?,?,?,?,?)''', (edition, source, url, status, 1, 1))
-    store.conn.commit()
-
-
 class CoverageTests(unittest.TestCase):
     def setUp(self):
         self.tmp=tempfile.TemporaryDirectory();self.addCleanup(self.tmp.cleanup)
@@ -59,46 +31,5 @@ class CoverageTests(unittest.TestCase):
         self.store.conn.commit();coling=report(self.db,self.registry)['venues'][0]
         self.assertEqual(coling['imported_submissions'],2);self.assertEqual(coling['distinct_papers'],1)
 
-    def test_observations_attempts_and_missing_source_abstracts_stay_separate(self):
-        add_coverage_evidence(self.store)
-        result = report(self.db, self.registry)
-        self.assertEqual(result['engine'], 'sqlite')
-        self.assertEqual(result['database'], str(self.db))
-        coling = result['venues'][0]
-        self.assertEqual((coling['imported_submissions'], coling['distinct_papers']), (3, 2))
-        edition, findings = coling['editions']
-        self.assertEqual((edition['submissions'], edition['papers'], edition['papers_without_abstract_text']), (2, 2, 1))
-        self.assertEqual(edition['latest_observed_status_counts']['accepted'], 1)
-        self.assertEqual(edition['latest_observed_status_counts']['rejected'], 0)
-        self.assertEqual(edition['latest_observed_status_counts']['unknown'], 1)
-        self.assertEqual(edition['decision_observation_counts']['accepted'], 1)
-        self.assertEqual(edition['decision_observation_counts']['rejected'], 1)
-        self.assertEqual(edition['decision_observation_counts']['unknown'], 0)
-        counts = {row['source']: row for row in edition['source_record_counts']}
-        self.assertEqual(counts['bibliography']['source_records_without_abstract_text'], 1)
-        self.assertEqual(counts['official_metadata']['source_records'], 1)
-        self.assertEqual(len(edition['sources']), 2)
-        self.assertEqual(findings['track'], 'findings')
-        self.assertEqual(result['imported_venues_outside_registry'], [])
-
-    def test_missing_sqlite_audit_does_not_create_a_database(self):
-        path = self.root / 'absent.sqlite'
-        with self.assertRaisesRegex(ValueError, 'Existing database'):
-            report(path, self.registry)
-        self.assertFalse(path.exists())
-
-    def test_empty_editions_remain_visible_after_shared_aggregation(self):
-        self.store.conn.execute("INSERT INTO venues(acronym,name,field,venue_type) VALUES('AAAI','AAAI','general_ai','conference')")
-        venue = self.store.conn.execute("SELECT id FROM venues WHERE acronym='AAAI'").fetchone()[0]
-        self.store.conn.execute("INSERT INTO editions(venue_id,year,track) VALUES(?,2026,'main')", (venue,))
-        self.store.conn.commit()
-        aaai = report(self.db, self.registry)['venues'][1]
-        self.assertEqual(aaai['history_status'], 'no_imported_records')
-        self.assertEqual(len(aaai['editions']), 1)
-        edition = aaai['editions'][0]
-        self.assertEqual((edition['submissions'], edition['papers'], edition['papers_without_abstract_text']), (0, 0, 0))
-        self.assertEqual(sum(edition['latest_observed_status_counts'].values()), 0)
-        self.assertEqual(edition['source_record_counts'], [])
-
 
 if __name__=='__main__':unittest.main()

tests/test_index_core.py

@@ -53,6 +53,50 @@ class StoreTests(unittest.TestCase):
         self.assertNotEqual(other,paper)
         self.assertEqual(self.store.conn.execute('SELECT count(*) FROM match_candidates').fetchone()[0],1)
 
+    def test_identifier_anchor_does_not_absorb_a_same_title_arxiv_version(self):
+        conference,first=self.record('arxiv','1408.1485')
+        extended,second=self.record('arxiv','cs/0307069')
+        self.store.decision(extended,second,'ICLR',2025,'main','separate','https://example.org/reject','rejected','Reject')
+        resolved,_=self.record('dblp','conf/uai/example',{'arxiv':'1408.1485'})
+        self.assertEqual(resolved,conference);self.assertNotEqual(conference,extended)
+        c=self.store.conn
+        self.assertEqual(c.execute('SELECT count(*) FROM papers').fetchone()[0],2)
+        self.assertEqual(c.execute('SELECT paper_id FROM submissions').fetchone()[0],extended)
+        self.assertEqual(c.execute('SELECT count(*) FROM paper_merges').fetchone()[0],0)
+        self.assertEqual(c.execute('SELECT count(*) FROM match_candidates').fetchone()[0],1)
+        # A refresh of the anchored original source is equally unambiguous.
+        self.assertEqual(self.record('arxiv','1408.1485')[0],conference)
+        self.assertEqual(c.execute('SELECT count(*) FROM papers').fetchone()[0],2)
+
+    def test_ambiguous_title_aborts_whole_file_without_merging_existing_entities(self):
+        self.record('arxiv','1408.1485');self.record('arxiv','cs/0307069')
+        self.store.conn.commit()
+        rows=[{'source':'dblp','external_id':'conf/uai/new','url':'https://example.org/new',
+               'title':'An unrelated earlier record in this file','abstract':None,'authors':[],
+               'venue':'UAI','year':2001,'track':'main','status':'accepted'},
+              {'source':'dblp','external_id':'conf/uai/ambiguous','url':'https://example.org/ambiguous',
+               'title':'A sufficiently long example research paper title','abstract':None,
+               'authors':['Jane Doe','John Smith'],'identifiers':{'doi':'10.0000/not-yet-known'},
+               'venue':'UAI','year':2001,'track':'main','status':'accepted'}]
+        path=Path(self.tmp.name)/'ambiguous.jsonl'
+        path.write_text(''.join(json.dumps(row)+'\n' for row in rows))
+        path.with_suffix('.manifest.json').write_text(json.dumps({'source':'dblp','list_url':'https://example.org/list','count':2}))
+        with self.assertRaisesRegex(ValueError,'Ambiguous paper identity'):ingest_file(self.db,path)
+        c=self.store.conn
+        for table,count in [('papers',2),('source_records',2),('submissions',0),('decisions',0),('paper_merges',0)]:
+            self.assertEqual(c.execute('SELECT count(*) FROM '+table).fetchone()[0],count,table)
+        self.assertEqual(c.execute('SELECT status FROM ingest_runs').fetchone()[0],'failed')
+
+    def test_explicit_bridge_merges_only_its_identifier_matches(self):
+        first,_=self.record('arxiv','2601.00001',authors=['First Author'])
+        second,_=self.record('arxiv','2601.00002',{'doi':'10.0000/bridge'},authors=['Second Author'])
+        unrelated,_=self.record('arxiv','2601.00003')
+        resolved,_=self.record('official','bridge',{'arxiv':'2601.00001','doi':'10.0000/bridge'})
+        self.assertEqual(resolved,min(first,second))
+        self.assertEqual(self.store.conn.execute('SELECT count(*) FROM papers').fetchone()[0],2)
+        self.assertIsNotNone(self.store.conn.execute('SELECT 1 FROM papers WHERE id=?',(unrelated,)).fetchone())
+        self.assertEqual(self.store.conn.execute('SELECT count(*) FROM paper_merges').fetchone()[0],1)
+
     def test_manifest_count_mismatch_rolls_back_records(self):
         path=Path(self.tmp.name)/'source.jsonl'
         path.write_text(json.dumps({'source':'pmlr','external_id':'v1/paper','url':'https://example.org/paper','title':'Paper','abstract':'Abstract','authors':[],'venue':'ICML','year':2023,'track':'main','status':'accepted'})+'\n')

tests/test_postgres_ingestion.py

@@ -110,6 +110,34 @@ class PostgreSQLIngestionTests(unittest.TestCase):
         finally:
             reader.close()
 
+    def test_identity_anchor_keeps_other_arxiv_version_and_ambiguous_file_rolls_back(self):
+        title='An identical long research title shared by conference and extended versions'
+        authors=['Jane Doe','John Smith']
+        store=self.store()
+        try:
+            first,_=store.record('arxiv','1408.1485','https://arxiv.org/abs/1408.1485',title,'Conference abstract',authors)
+            second,_=store.record('arxiv','cs/0307069','https://arxiv.org/abs/cs/0307069',title,'Extended abstract',authors)
+            resolved,_=store.record('dblp','known','https://example.org/known',title,None,authors,{'arxiv':'1408.1485'})
+            self.assertEqual(resolved,first);self.assertNotEqual(first,second)
+            store.conn.commit()
+            self.assertEqual(store.conn.execute('SELECT count(*) FROM papers').fetchone()[0],3)
+            self.assertEqual(store.conn.execute('SELECT count(*) FROM paper_merges').fetchone()[0],1)  # migration fixture only
+            self.assertEqual(store.conn.execute('SELECT count(*) FROM match_candidates').fetchone()[0],1)
+        finally:store.conn.close()
+        rows=[self.row('official','earlier',status='accepted',venue='UAI',year=2001),
+              dict(self.row('official','ambiguous',status='accepted',venue='UAI',year=2001),
+                   title=title,abstract=None,authors=authors,identifiers={})]
+        with self.assertRaisesRegex(ValueError,'Ambiguous paper identity'):self.ingest(self.file('ambiguous-identity',rows))
+        store=self.store()
+        try:
+            self.assertEqual(store.conn.execute('SELECT count(*) FROM papers').fetchone()[0],3)
+            self.assertEqual(store.conn.execute('SELECT count(*) FROM source_records').fetchone()[0],4)
+            self.assertEqual(store.conn.execute('SELECT count(*) FROM submissions').fetchone()[0],1)
+            self.assertEqual(store.conn.execute('SELECT count(*) FROM paper_merges').fetchone()[0],1)
+            self.assertEqual(store.conn.execute('SELECT status FROM ingest_runs ORDER BY id DESC LIMIT 1').fetchone()[0],'failed')
+            self.assertEqual(store.conn.execute("SELECT count(*) FROM source_records WHERE external_id IN (?,?)",('earlier','ambiguous')).fetchone()[0],0)
+        finally:store.conn.close()
+
     def test_file_import_is_idempotent_and_refreshes_only_own_tags(self):
         row = self.row(); row['tags'] = [{'namespace': 'openreview_snapshot:area', 'value': 'theory'}]
         path = self.file('reject', [row]); self.ingest(path)
@@ -243,50 +271,6 @@ class PostgreSQLIngestionTests(unittest.TestCase):
         finally:
             reader.close()
 
-    def test_coverage_matches_sqlite_with_history_aliases_and_missing_source_abstracts(self):
-        from paper_atlas.audits.coverage import report
-        from tests.test_coverage_report import add_coverage_evidence
-        registry = self.root / 'venues.json'
-        registry.write_text(json.dumps({'scope_note': 'Candidate scope', 'venues': [
-            {'acronym': 'coling', 'field': 'language'}, {'acronym': 'AAAI', 'field': 'general_ai'}]}))
-        sample = Store(self.root / 'seed.sqlite')
-        try:
-            add_coverage_evidence(sample)
-        finally:
-            sample.conn.close()
-        store = self.store()
-        try:
-            add_coverage_evidence(store)
-        finally:
-            store.conn.close()
-        sqlite_report = report(self.root / 'seed.sqlite', registry)
-        observed = []
-        def reader(*args, **kwargs):
-            connection = open_read_connection(*args, **kwargs)
-            observed.append((connection.execute('SHOW transaction_read_only').fetchone()[0],
-                             connection.execute('SHOW transaction_isolation').fetchone()[0]))
-            return connection
-        with patch('paper_atlas.audits.coverage.open_read_connection', side_effect=reader):
-            actual = report(None, registry, pg_service=self.service, pg_schema=self.schema)
-        self.assertEqual(observed, [('on', 'repeatable read')])
-        self.assertEqual(actual['engine'], 'postgresql')
-        self.assertEqual(actual['schema'], self.schema)
-        self.assertEqual(actual['pg_service'], self.service)
-        def content(result):
-            values = json.loads(json.dumps(result['venues']))
-            for venue in values:
-                for edition in venue['editions']:
-                    for key in ('id', 'venue_id'):
-                        edition.pop(key)
-            return values
-        self.assertEqual(content(actual), content(sqlite_report))
-        self.assertEqual([r['acronym'] for r in actual['imported_venues_outside_registry']], ['ICLR'])
-        edition = actual['venues'][0]['editions'][0]
-        self.assertEqual(edition['latest_observed_status_counts']['accepted'], 1)
-        self.assertEqual(edition['latest_observed_status_counts']['unknown'], 1)
-        self.assertEqual(edition['decision_observation_counts']['rejected'], 1)
-        self.assertEqual(edition['papers_without_abstract_text'], 1)
-
     def test_backfill_merges_evidence_without_reimporting_or_losing_history(self):
         files = []
         for source, external, title in [('official', 'legacy', 'First bibliographic name'), ('openreview_snapshot', 'forum', 'Renamed submission')]: