{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:HSK5QQQH4SWD26ECXPRO267FND","short_pith_number":"pith:HSK5QQQH","canonical_record":{"source":{"id":"2011.02297","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2020-11-04T13:53:17Z","cross_cats_sorted":[],"title_canon_sha256":"bca9ce4f120425b83ef94469cb45a519eb3e707127093fa17a9f2ec8bc315a6b","abstract_canon_sha256":"306a5f24b361d6705fa0a2167a2e7da97b4ddcc37fe74ff8bb6e7ac894f81d2c"},"schema_version":"1.0"},"canonical_sha256":"3c95d84207e4ac3d7882bbe2ed7be568fe7dcf8a3bea9fe8b9e71f4879dfcc5c","source":{"kind":"arxiv","id":"2011.02297","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2011.02297","created_at":"2026-07-05T03:21:07Z"},{"alias_kind":"arxiv_version","alias_value":"2011.02297v1","created_at":"2026-07-05T03:21:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2011.02297","created_at":"2026-07-05T03:21:07Z"},{"alias_kind":"pith_short_12","alias_value":"HSK5QQQH4SWD","created_at":"2026-07-05T03:21:07Z"},{"alias_kind":"pith_short_16","alias_value":"HSK5QQQH4SWD26EC","created_at":"2026-07-05T03:21:07Z"},{"alias_kind":"pith_short_8","alias_value":"HSK5QQQH","created_at":"2026-07-05T03:21:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:HSK5QQQH4SWD26ECXPRO267FND","target":"record","payload":{"canonical_record":{"source":{"id":"2011.02297","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2020-11-04T13:53:17Z","cross_cats_sorted":[],"title_canon_sha256":"bca9ce4f120425b83ef94469cb45a519eb3e707127093fa17a9f2ec8bc315a6b","abstract_canon_sha256":"306a5f24b361d6705fa0a2167a2e7da97b4ddcc37fe74ff8bb6e7ac894f81d2c"},"schema_version":"1.0"},"canonical_sha256":"3c95d84207e4ac3d7882bbe2ed7be568fe7dcf8a3bea9fe8b9e71f4879dfcc5c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:21:07.022356Z","signature_b64":"Oxvq5S59csGalvDpYAVK3KWdgcWK3DiNRSJ7i9tvCZYp7feiHlL1JCbTBRmupO5C0g5y8wua9JbsYoAYLoaHDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3c95d84207e4ac3d7882bbe2ed7be568fe7dcf8a3bea9fe8b9e71f4879dfcc5c","last_reissued_at":"2026-07-05T03:21:07.021857Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:21:07.021857Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2011.02297","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:21:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fCFSWWCSBg/oNpovJxdsHWg5Ff5tRc5IJKtQHhwEVWcdWqXcnTw01nCp4ntP+1J1DnLsJ1NpszJgBW+h3ERrCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-15T01:06:41.538063Z"},"content_sha256":"a0991b061d2b75d3f4cd0fe35aaf87758750f771d17efbfd7874f3dd411431fa","schema_version":"1.0","event_id":"sha256:a0991b061d2b75d3f4cd0fe35aaf87758750f771d17efbfd7874f3dd411431fa"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:HSK5QQQH4SWD26ECXPRO267FND","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Opportunities and Challenges in Code Search Tools","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.SE","authors_text":"Chao Liu, Cuiyun Gao, David Lo, John Grundy, Xiaohu Yang, Xin Xia","submitted_at":"2020-11-04T13:53:17Z","abstract_excerpt":"Code search is a core software engineering task. Effective code search tools can help developers substantially improve their software development efficiency and effectiveness. In recent years, many code search studies have leveraged different techniques, such as deep learning and information retrieval approaches, to retrieve expected code from a large-scale codebase. However, there is a lack of a comprehensive comparative summary of existing code search approaches. To understand the research trends in existing code search studies, we systematically reviewed 81 relevant studies. We investigated"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2011.02297","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2011.02297/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:21:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ma9LXrmwstNlCFzaYcICvbFiH9MhN+8430UeA612Vcq6R+5oWCCNxbVT5ejGrDqTRLaTY27rp6naH8JO5qVPCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-15T01:06:41.538437Z"},"content_sha256":"57ac2e67d9703e8cf6771c68e24dbb720f75e4fc2968796605d9eab989e7ef03","schema_version":"1.0","event_id":"sha256:57ac2e67d9703e8cf6771c68e24dbb720f75e4fc2968796605d9eab989e7ef03"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HSK5QQQH4SWD26ECXPRO267FND/bundle.json","state_url":"https://pith.science/pith/HSK5QQQH4SWD26ECXPRO267FND/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HSK5QQQH4SWD26ECXPRO267FND/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-07-15T01:06:41Z","links":{"resolver":"https://pith.science/pith/HSK5QQQH4SWD26ECXPRO267FND","bundle":"https://pith.science/pith/HSK5QQQH4SWD26ECXPRO267FND/bundle.json","state":"https://pith.science/pith/HSK5QQQH4SWD26ECXPRO267FND/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HSK5QQQH4SWD26ECXPRO267FND/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:HSK5QQQH4SWD26ECXPRO267FND","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"306a5f24b361d6705fa0a2167a2e7da97b4ddcc37fe74ff8bb6e7ac894f81d2c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2020-11-04T13:53:17Z","title_canon_sha256":"bca9ce4f120425b83ef94469cb45a519eb3e707127093fa17a9f2ec8bc315a6b"},"schema_version":"1.0","source":{"id":"2011.02297","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2011.02297","created_at":"2026-07-05T03:21:07Z"},{"alias_kind":"arxiv_version","alias_value":"2011.02297v1","created_at":"2026-07-05T03:21:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2011.02297","created_at":"2026-07-05T03:21:07Z"},{"alias_kind":"pith_short_12","alias_value":"HSK5QQQH4SWD","created_at":"2026-07-05T03:21:07Z"},{"alias_kind":"pith_short_16","alias_value":"HSK5QQQH4SWD26EC","created_at":"2026-07-05T03:21:07Z"},{"alias_kind":"pith_short_8","alias_value":"HSK5QQQH","created_at":"2026-07-05T03:21:07Z"}],"graph_snapshots":[{"event_id":"sha256:57ac2e67d9703e8cf6771c68e24dbb720f75e4fc2968796605d9eab989e7ef03","target":"graph","created_at":"2026-07-05T03:21:07Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2011.02297/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Code search is a core software engineering task. Effective code search tools can help developers substantially improve their software development efficiency and effectiveness. In recent years, many code search studies have leveraged different techniques, such as deep learning and information retrieval approaches, to retrieve expected code from a large-scale codebase. However, there is a lack of a comprehensive comparative summary of existing code search approaches. To understand the research trends in existing code search studies, we systematically reviewed 81 relevant studies. We investigated","authors_text":"Chao Liu, Cuiyun Gao, David Lo, John Grundy, Xiaohu Yang, Xin Xia","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2020-11-04T13:53:17Z","title":"Opportunities and Challenges in Code Search Tools"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2011.02297","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:a0991b061d2b75d3f4cd0fe35aaf87758750f771d17efbfd7874f3dd411431fa","target":"record","created_at":"2026-07-05T03:21:07Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"306a5f24b361d6705fa0a2167a2e7da97b4ddcc37fe74ff8bb6e7ac894f81d2c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2020-11-04T13:53:17Z","title_canon_sha256":"bca9ce4f120425b83ef94469cb45a519eb3e707127093fa17a9f2ec8bc315a6b"},"schema_version":"1.0","source":{"id":"2011.02297","kind":"arxiv","version":1}},"canonical_sha256":"3c95d84207e4ac3d7882bbe2ed7be568fe7dcf8a3bea9fe8b9e71f4879dfcc5c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3c95d84207e4ac3d7882bbe2ed7be568fe7dcf8a3bea9fe8b9e71f4879dfcc5c","first_computed_at":"2026-07-05T03:21:07.021857Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:21:07.021857Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Oxvq5S59csGalvDpYAVK3KWdgcWK3DiNRSJ7i9tvCZYp7feiHlL1JCbTBRmupO5C0g5y8wua9JbsYoAYLoaHDw==","signature_status":"signed_v1","signed_at":"2026-07-05T03:21:07.022356Z","signed_message":"canonical_sha256_bytes"},"source_id":"2011.02297","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a0991b061d2b75d3f4cd0fe35aaf87758750f771d17efbfd7874f3dd411431fa","sha256:57ac2e67d9703e8cf6771c68e24dbb720f75e4fc2968796605d9eab989e7ef03"],"state_sha256":"43d49fbd6bb420ecbaff11ead7c5ecb13c26e525468747ee167a15deb97b3c28"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/mj0MIm8KF/pRlMqWoKUX+8HOWrYd4wgs4t3oppYg0dWZ/y5GAQ+ZV0v03d9ylR3s8XMTtrSaChhS3GVDmk3CA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-15T01:06:41.540820Z","bundle_sha256":"8718a4cb185c8437c2f6471e227c399f6fa47897b1616a924ca8b01af6fb8009"}}