{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:R2Z75YZF7VAUNAYSR4EM7DKXER","short_pith_number":"pith:R2Z75YZF","canonical_record":{"source":{"id":"1511.00735","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DL","submitted_at":"2015-11-02T22:55:50Z","cross_cats_sorted":[],"title_canon_sha256":"086b8ef87bbf701677f2127cb87fd3f9fb39fb291a976b8589c0fa641482974e","abstract_canon_sha256":"fbe08b9777cd8b8993634edbb4e4b702fbf996ea60fd50a0853fddfb120e904d"},"schema_version":"1.0"},"canonical_sha256":"8eb3fee325fd414683128f08cf8d57245eee1cc3aad5063e833060eafaa18f6c","source":{"kind":"arxiv","id":"1511.00735","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1511.00735","created_at":"2026-05-18T01:22:05Z"},{"alias_kind":"arxiv_version","alias_value":"1511.00735v2","created_at":"2026-05-18T01:22:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1511.00735","created_at":"2026-05-18T01:22:05Z"},{"alias_kind":"pith_short_12","alias_value":"R2Z75YZF7VAU","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_16","alias_value":"R2Z75YZF7VAUNAYS","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_8","alias_value":"R2Z75YZF","created_at":"2026-05-18T12:29:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:R2Z75YZF7VAUNAYSR4EM7DKXER","target":"record","payload":{"canonical_record":{"source":{"id":"1511.00735","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DL","submitted_at":"2015-11-02T22:55:50Z","cross_cats_sorted":[],"title_canon_sha256":"086b8ef87bbf701677f2127cb87fd3f9fb39fb291a976b8589c0fa641482974e","abstract_canon_sha256":"fbe08b9777cd8b8993634edbb4e4b702fbf996ea60fd50a0853fddfb120e904d"},"schema_version":"1.0"},"canonical_sha256":"8eb3fee325fd414683128f08cf8d57245eee1cc3aad5063e833060eafaa18f6c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:22:05.775546Z","signature_b64":"49e/Qs4Nx9tjjt76jmbNwY8gJH0dqO/H9O+Fpu3oXnY4RwOpeiPH38IUPyTIul1cYvvVeyKR+dFmAMbFK8/kDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8eb3fee325fd414683128f08cf8d57245eee1cc3aad5063e833060eafaa18f6c","last_reissued_at":"2026-05-18T01:22:05.775071Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:22:05.775071Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1511.00735","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:22:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1FIyCMGFnQrfK+lh21icuMADm0KCyJqGpxGfIYBc57NkJBhe7o9Jn7xTCp301/ej+mhGAwSxw0oSfJHDWIgwAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T11:02:44.419134Z"},"content_sha256":"05a2bdfef223359930d66b56de5083000e8765ba45bc5213bfd9044b58b91557","schema_version":"1.0","event_id":"sha256:05a2bdfef223359930d66b56de5083000e8765ba45bc5213bfd9044b58b91557"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:R2Z75YZF7VAUNAYSR4EM7DKXER","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Large-Scale Analysis of the Accuracy of the Journal Classification Systems of Web of Science and Scopus","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.DL","authors_text":"Ludo Waltman, Qi Wang","submitted_at":"2015-11-02T22:55:50Z","abstract_excerpt":"Journal classification systems play an important role in bibliometric analyses. The two most important bibliographic databases, Web of Science and Scopus, each provide a journal classification system. However, no study has systematically investigated the accuracy of these classification systems. To examine and compare the accuracy of journal classification systems, we define two criteria on the basis of direct citation relations between journals and categories. We use Criterion I to select journals that have weak connections with their assigned categories, and we use Criterion II to identify j"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1511.00735","kind":"arxiv","version":2},"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":"2026-05-18T01:22:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"r5v6WCLQyCNXT+5UdrA6AnNRfb05NXo8HR0VHsvW8tVRPA7dVuy+2L3ib0BmOa1hGRARLUKbMDXMI8FA5bcqAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T11:02:44.419944Z"},"content_sha256":"5832c57a1322fd527eaa90b7efb31fb84183f2a61c5a54da57ba911b1e7ecc07","schema_version":"1.0","event_id":"sha256:5832c57a1322fd527eaa90b7efb31fb84183f2a61c5a54da57ba911b1e7ecc07"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/R2Z75YZF7VAUNAYSR4EM7DKXER/bundle.json","state_url":"https://pith.science/pith/R2Z75YZF7VAUNAYSR4EM7DKXER/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/R2Z75YZF7VAUNAYSR4EM7DKXER/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":"2026-06-10T11:02:44Z","links":{"resolver":"https://pith.science/pith/R2Z75YZF7VAUNAYSR4EM7DKXER","bundle":"https://pith.science/pith/R2Z75YZF7VAUNAYSR4EM7DKXER/bundle.json","state":"https://pith.science/pith/R2Z75YZF7VAUNAYSR4EM7DKXER/state.json","well_known_bundle":"https://pith.science/.well-known/pith/R2Z75YZF7VAUNAYSR4EM7DKXER/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:R2Z75YZF7VAUNAYSR4EM7DKXER","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":"fbe08b9777cd8b8993634edbb4e4b702fbf996ea60fd50a0853fddfb120e904d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DL","submitted_at":"2015-11-02T22:55:50Z","title_canon_sha256":"086b8ef87bbf701677f2127cb87fd3f9fb39fb291a976b8589c0fa641482974e"},"schema_version":"1.0","source":{"id":"1511.00735","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1511.00735","created_at":"2026-05-18T01:22:05Z"},{"alias_kind":"arxiv_version","alias_value":"1511.00735v2","created_at":"2026-05-18T01:22:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1511.00735","created_at":"2026-05-18T01:22:05Z"},{"alias_kind":"pith_short_12","alias_value":"R2Z75YZF7VAU","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_16","alias_value":"R2Z75YZF7VAUNAYS","created_at":"2026-05-18T12:29:39Z"},{"alias_kind":"pith_short_8","alias_value":"R2Z75YZF","created_at":"2026-05-18T12:29:39Z"}],"graph_snapshots":[{"event_id":"sha256:5832c57a1322fd527eaa90b7efb31fb84183f2a61c5a54da57ba911b1e7ecc07","target":"graph","created_at":"2026-05-18T01:22:05Z","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":"Journal classification systems play an important role in bibliometric analyses. The two most important bibliographic databases, Web of Science and Scopus, each provide a journal classification system. However, no study has systematically investigated the accuracy of these classification systems. To examine and compare the accuracy of journal classification systems, we define two criteria on the basis of direct citation relations between journals and categories. We use Criterion I to select journals that have weak connections with their assigned categories, and we use Criterion II to identify j","authors_text":"Ludo Waltman, Qi Wang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DL","submitted_at":"2015-11-02T22:55:50Z","title":"Large-Scale Analysis of the Accuracy of the Journal Classification Systems of Web of Science and Scopus"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1511.00735","kind":"arxiv","version":2},"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":"sha256:05a2bdfef223359930d66b56de5083000e8765ba45bc5213bfd9044b58b91557","target":"record","created_at":"2026-05-18T01:22:05Z","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":"fbe08b9777cd8b8993634edbb4e4b702fbf996ea60fd50a0853fddfb120e904d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DL","submitted_at":"2015-11-02T22:55:50Z","title_canon_sha256":"086b8ef87bbf701677f2127cb87fd3f9fb39fb291a976b8589c0fa641482974e"},"schema_version":"1.0","source":{"id":"1511.00735","kind":"arxiv","version":2}},"canonical_sha256":"8eb3fee325fd414683128f08cf8d57245eee1cc3aad5063e833060eafaa18f6c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8eb3fee325fd414683128f08cf8d57245eee1cc3aad5063e833060eafaa18f6c","first_computed_at":"2026-05-18T01:22:05.775071Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:22:05.775071Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"49e/Qs4Nx9tjjt76jmbNwY8gJH0dqO/H9O+Fpu3oXnY4RwOpeiPH38IUPyTIul1cYvvVeyKR+dFmAMbFK8/kDA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:22:05.775546Z","signed_message":"canonical_sha256_bytes"},"source_id":"1511.00735","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:05a2bdfef223359930d66b56de5083000e8765ba45bc5213bfd9044b58b91557","sha256:5832c57a1322fd527eaa90b7efb31fb84183f2a61c5a54da57ba911b1e7ecc07"],"state_sha256":"ac4a17e21f20faff708663fc0a3c14c7073ed30416b69303086227d02db4c008"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HEJTsD7XMrFlw1MNSOGGoHkMhimvuurQAjTCd3nMYtn/GMlDmMBf1NO3K5esLrljsc1pTZMFGaOGq68i6w0+Dg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-10T11:02:44.425119Z","bundle_sha256":"7ec1db38aa2139761f1d6b92f252ed4267e88233082f50b8f12b2e2736bc61e5"}}