{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:OHMXV6TVHBRZAZWB7DNUYBXOWN","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":"2db9ba895cc1596891c02c44a4860543a0742f0967b3ec4b6b7a07d03358a8ce","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DL","submitted_at":"2012-08-30T10:02:34Z","title_canon_sha256":"494ddb6b134ae73377ef88491735ed03078aa7b7283d56d2fe28bcc38f20f0e3"},"schema_version":"1.0","source":{"id":"1208.6122","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1208.6122","created_at":"2026-05-18T03:46:06Z"},{"alias_kind":"arxiv_version","alias_value":"1208.6122v2","created_at":"2026-05-18T03:46:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1208.6122","created_at":"2026-05-18T03:46:06Z"},{"alias_kind":"pith_short_12","alias_value":"OHMXV6TVHBRZ","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_16","alias_value":"OHMXV6TVHBRZAZWB","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_8","alias_value":"OHMXV6TV","created_at":"2026-05-18T12:27:16Z"}],"graph_snapshots":[{"event_id":"sha256:34ff3cbe2c5285b1745dbb963ff6f785f4160652f9f2cb3b9c4aeb500f4ad8a1","target":"graph","created_at":"2026-05-18T03:46:06Z","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":"Different scientific fields have different citation practices. Citation-based bibliometric indicators need to normalize for such differences between fields in order to allow for meaningful between-field comparisons of citation impact. Traditionally, normalization for field differences has usually been done based on a field classification system. In this approach, each publication belongs to one or more fields and the citation impact of a publication is calculated relative to the other publications in the same field. Recently, the idea of source normalization was introduced, which offers an alt","authors_text":"Ludo Waltman, Nees Jan van Eck","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DL","submitted_at":"2012-08-30T10:02:34Z","title":"Source normalized indicators of citation impact: An overview of different approaches and an empirical comparison"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1208.6122","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":"sha256:2c7c0977593e16f3128d4a0551f9cbd04bb8cadb75da3b83504de52b3c58704c","target":"record","created_at":"2026-05-18T03:46:06Z","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":"2db9ba895cc1596891c02c44a4860543a0742f0967b3ec4b6b7a07d03358a8ce","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DL","submitted_at":"2012-08-30T10:02:34Z","title_canon_sha256":"494ddb6b134ae73377ef88491735ed03078aa7b7283d56d2fe28bcc38f20f0e3"},"schema_version":"1.0","source":{"id":"1208.6122","kind":"arxiv","version":2}},"canonical_sha256":"71d97afa7538639066c1f8db4c06eeb363564049ddc1374564571e52b88bbc39","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"71d97afa7538639066c1f8db4c06eeb363564049ddc1374564571e52b88bbc39","first_computed_at":"2026-05-18T03:46:06.608587Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:46:06.608587Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KdWwuNbq4wWAn5fLadwL1jxcealY/rlHyNaBQ8EGxaiIMycjWnfAis6gtMci7fjl19pACF71GXvqA4UDAgNKBw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:46:06.609251Z","signed_message":"canonical_sha256_bytes"},"source_id":"1208.6122","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2c7c0977593e16f3128d4a0551f9cbd04bb8cadb75da3b83504de52b3c58704c","sha256:34ff3cbe2c5285b1745dbb963ff6f785f4160652f9f2cb3b9c4aeb500f4ad8a1"],"state_sha256":"19b7f38693f807fa5542a5d5f9955f8686682f3bc2e94352cff63fa0649ab593"}