{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:NEGSURKCMI5OEALE5IVKK5BLRE","short_pith_number":"pith:NEGSURKC","canonical_record":{"source":{"id":"1906.04903","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2019-06-12T02:48:57Z","cross_cats_sorted":["cs.CL"],"title_canon_sha256":"a242a31f6a6d563856af06023af04634e217a9067d37b9ea6d21c5565e0a8e36","abstract_canon_sha256":"33fc509e3e9627c6f3aa97c659b261918080d8f71c85a5105262660525866f08"},"schema_version":"1.0"},"canonical_sha256":"690d2a4542623ae20164ea2aa5742b891fa87d0462fd6580e4c9d2aeedadff1a","source":{"kind":"arxiv","id":"1906.04903","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.04903","created_at":"2026-05-17T23:43:30Z"},{"alias_kind":"arxiv_version","alias_value":"1906.04903v1","created_at":"2026-05-17T23:43:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.04903","created_at":"2026-05-17T23:43:30Z"},{"alias_kind":"pith_short_12","alias_value":"NEGSURKCMI5O","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_16","alias_value":"NEGSURKCMI5OEALE","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_8","alias_value":"NEGSURKC","created_at":"2026-05-18T12:33:24Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:NEGSURKCMI5OEALE5IVKK5BLRE","target":"record","payload":{"canonical_record":{"source":{"id":"1906.04903","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2019-06-12T02:48:57Z","cross_cats_sorted":["cs.CL"],"title_canon_sha256":"a242a31f6a6d563856af06023af04634e217a9067d37b9ea6d21c5565e0a8e36","abstract_canon_sha256":"33fc509e3e9627c6f3aa97c659b261918080d8f71c85a5105262660525866f08"},"schema_version":"1.0"},"canonical_sha256":"690d2a4542623ae20164ea2aa5742b891fa87d0462fd6580e4c9d2aeedadff1a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:43:30.160078Z","signature_b64":"x78+NnJ57S75v0Wson4IqOO95zp6Oy4XiMoUxrzpqPcu3bqxUsgDAJqZ8GL/Lx4RW5m7s1EBqt7bqfZOGTOwCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"690d2a4542623ae20164ea2aa5742b891fa87d0462fd6580e4c9d2aeedadff1a","last_reissued_at":"2026-05-17T23:43:30.159461Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:43:30.159461Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1906.04903","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":"2026-05-17T23:43:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"T0hp8fZnaeqNwvJRR8Joxcs3v0U/lVW8YIE4D8+eSb+MI954JAJ6sl+Gucx8APRSOCcm//KZacl1MMAriHLXBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T22:57:23.011170Z"},"content_sha256":"46f78552e61af6eea5beda9de0b8475bbfc591c1c9bdd0d28911c88b4a241863","schema_version":"1.0","event_id":"sha256:46f78552e61af6eea5beda9de0b8475bbfc591c1c9bdd0d28911c88b4a241863"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:NEGSURKCMI5OEALE5IVKK5BLRE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Does BLEU Score Work for Code Migration?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.CL"],"primary_cat":"cs.SE","authors_text":"Hieu Tran, Hoan Nguyen, Ngoc Tran, Son Nguyen, Tien N. Nguyen","submitted_at":"2019-06-12T02:48:57Z","abstract_excerpt":"Statistical machine translation (SMT) is a fast-growing sub-field of computational linguistics. Until now, the most popular automatic metric to measure the quality of SMT is BiLingual Evaluation Understudy (BLEU) score. Lately, SMT along with the BLEU metric has been applied to a Software Engineering task named code migration. (In)Validating the use of BLEU score could advance the research and development of SMT-based code migration tools. Unfortunately, there is no study to approve or disapprove the use of BLEU score for source code. In this paper, we conducted an empirical study on BLEU scor"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.04903","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":""},"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":"2026-05-17T23:43:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1ykVkXxoBJ+aO+/9l/v0vi5t+41e6YuWpHHd/6eTBJJ6xsSmnvJdpjL0btoLzeIzFUFVg09+lJdIG/PFRKc6Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T22:57:23.011851Z"},"content_sha256":"ca721754d61a9f0c511d97923a1f4dacb6c3ce3a9cd8fa40cd23e0690622fd23","schema_version":"1.0","event_id":"sha256:ca721754d61a9f0c511d97923a1f4dacb6c3ce3a9cd8fa40cd23e0690622fd23"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NEGSURKCMI5OEALE5IVKK5BLRE/bundle.json","state_url":"https://pith.science/pith/NEGSURKCMI5OEALE5IVKK5BLRE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NEGSURKCMI5OEALE5IVKK5BLRE/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":"2026-05-25T22:57:23Z","links":{"resolver":"https://pith.science/pith/NEGSURKCMI5OEALE5IVKK5BLRE","bundle":"https://pith.science/pith/NEGSURKCMI5OEALE5IVKK5BLRE/bundle.json","state":"https://pith.science/pith/NEGSURKCMI5OEALE5IVKK5BLRE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NEGSURKCMI5OEALE5IVKK5BLRE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:NEGSURKCMI5OEALE5IVKK5BLRE","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":"33fc509e3e9627c6f3aa97c659b261918080d8f71c85a5105262660525866f08","cross_cats_sorted":["cs.CL"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2019-06-12T02:48:57Z","title_canon_sha256":"a242a31f6a6d563856af06023af04634e217a9067d37b9ea6d21c5565e0a8e36"},"schema_version":"1.0","source":{"id":"1906.04903","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.04903","created_at":"2026-05-17T23:43:30Z"},{"alias_kind":"arxiv_version","alias_value":"1906.04903v1","created_at":"2026-05-17T23:43:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.04903","created_at":"2026-05-17T23:43:30Z"},{"alias_kind":"pith_short_12","alias_value":"NEGSURKCMI5O","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_16","alias_value":"NEGSURKCMI5OEALE","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_8","alias_value":"NEGSURKC","created_at":"2026-05-18T12:33:24Z"}],"graph_snapshots":[{"event_id":"sha256:ca721754d61a9f0c511d97923a1f4dacb6c3ce3a9cd8fa40cd23e0690622fd23","target":"graph","created_at":"2026-05-17T23:43:30Z","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"},"paper":{"abstract_excerpt":"Statistical machine translation (SMT) is a fast-growing sub-field of computational linguistics. Until now, the most popular automatic metric to measure the quality of SMT is BiLingual Evaluation Understudy (BLEU) score. Lately, SMT along with the BLEU metric has been applied to a Software Engineering task named code migration. (In)Validating the use of BLEU score could advance the research and development of SMT-based code migration tools. Unfortunately, there is no study to approve or disapprove the use of BLEU score for source code. In this paper, we conducted an empirical study on BLEU scor","authors_text":"Hieu Tran, Hoan Nguyen, Ngoc Tran, Son Nguyen, Tien N. Nguyen","cross_cats":["cs.CL"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2019-06-12T02:48:57Z","title":"Does BLEU Score Work for Code Migration?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.04903","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":"sha256:46f78552e61af6eea5beda9de0b8475bbfc591c1c9bdd0d28911c88b4a241863","target":"record","created_at":"2026-05-17T23:43:30Z","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":"33fc509e3e9627c6f3aa97c659b261918080d8f71c85a5105262660525866f08","cross_cats_sorted":["cs.CL"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2019-06-12T02:48:57Z","title_canon_sha256":"a242a31f6a6d563856af06023af04634e217a9067d37b9ea6d21c5565e0a8e36"},"schema_version":"1.0","source":{"id":"1906.04903","kind":"arxiv","version":1}},"canonical_sha256":"690d2a4542623ae20164ea2aa5742b891fa87d0462fd6580e4c9d2aeedadff1a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"690d2a4542623ae20164ea2aa5742b891fa87d0462fd6580e4c9d2aeedadff1a","first_computed_at":"2026-05-17T23:43:30.159461Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:43:30.159461Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"x78+NnJ57S75v0Wson4IqOO95zp6Oy4XiMoUxrzpqPcu3bqxUsgDAJqZ8GL/Lx4RW5m7s1EBqt7bqfZOGTOwCw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:43:30.160078Z","signed_message":"canonical_sha256_bytes"},"source_id":"1906.04903","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:46f78552e61af6eea5beda9de0b8475bbfc591c1c9bdd0d28911c88b4a241863","sha256:ca721754d61a9f0c511d97923a1f4dacb6c3ce3a9cd8fa40cd23e0690622fd23"],"state_sha256":"71c15b009c4d5f3a90c1b3fd0106ea54c900dc5073301d1db016532bfa1afab1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3VYUQD0vnJaDKYZG8lZhxKCNOenKuKQBUOcPyRAdLTTiATZSLHs3vY4VyAtMx18VxalvYiCcoZHVxyhu6M3VBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T22:57:23.015627Z","bundle_sha256":"f7aad8ffda6f1b4199bd5f53050a8aa3c709a56d7d3549176411d674da1b0f9f"}}