{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:65PTU7A4BDKKIC2VQOFYSRBCFH","short_pith_number":"pith:65PTU7A4","canonical_record":{"source":{"id":"2203.14541","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.IR","submitted_at":"2022-03-28T07:35:26Z","cross_cats_sorted":["cs.CL"],"title_canon_sha256":"df30a4a1065dfa7ac2644649b0b7969a73ca9b5f1fcf50b30ac9ea8fbaccd305","abstract_canon_sha256":"9e399b5e6d3d677b7a56a595a366ee05d6cc83b53b4e9599b83842006e00183c"},"schema_version":"1.0"},"canonical_sha256":"f75f3a7c1c08d4a40b55838b89442229fab100719ea4684d8a2917e7316d883a","source":{"kind":"arxiv","id":"2203.14541","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2203.14541","created_at":"2026-07-05T04:09:06Z"},{"alias_kind":"arxiv_version","alias_value":"2203.14541v1","created_at":"2026-07-05T04:09:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2203.14541","created_at":"2026-07-05T04:09:06Z"},{"alias_kind":"pith_short_12","alias_value":"65PTU7A4BDKK","created_at":"2026-07-05T04:09:06Z"},{"alias_kind":"pith_short_16","alias_value":"65PTU7A4BDKKIC2V","created_at":"2026-07-05T04:09:06Z"},{"alias_kind":"pith_short_8","alias_value":"65PTU7A4","created_at":"2026-07-05T04:09:06Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:65PTU7A4BDKKIC2VQOFYSRBCFH","target":"record","payload":{"canonical_record":{"source":{"id":"2203.14541","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.IR","submitted_at":"2022-03-28T07:35:26Z","cross_cats_sorted":["cs.CL"],"title_canon_sha256":"df30a4a1065dfa7ac2644649b0b7969a73ca9b5f1fcf50b30ac9ea8fbaccd305","abstract_canon_sha256":"9e399b5e6d3d677b7a56a595a366ee05d6cc83b53b4e9599b83842006e00183c"},"schema_version":"1.0"},"canonical_sha256":"f75f3a7c1c08d4a40b55838b89442229fab100719ea4684d8a2917e7316d883a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:09:06.297987Z","signature_b64":"h6rsdqRpUz/byJQnD+RBJmJfdwFZ7BktD/qvBcqSfWowmg/POtp1Fqv3KA/e9MquexwqBpByyBz2XaAQ0hr8Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f75f3a7c1c08d4a40b55838b89442229fab100719ea4684d8a2917e7316d883a","last_reissued_at":"2026-07-05T04:09:06.297511Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:09:06.297511Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2203.14541","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":"2026-07-05T04:09:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1qgmh4njpSZU8JesDg5xDlmcOyGlsEfvx+PFx1zOVCBDH318+F9BNpIe8GlDjmGrRmOBZaTg/vtxmoONTDAADg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T06:40:25.418632Z"},"content_sha256":"b05e7fd8c31d43b663db7168d8f57d18e4779eb6f3dedaff5f81a015f7a46b9c","schema_version":"1.0","event_id":"sha256:b05e7fd8c31d43b663db7168d8f57d18e4779eb6f3dedaff5f81a015f7a46b9c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:65PTU7A4BDKKIC2VQOFYSRBCFH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Specialized Document Embeddings for Aspect-based Similarity of Research Papers","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.CL"],"primary_cat":"cs.IR","authors_text":"Bela Gipp, Georg Rehm, Malte Ostendorff, Terry Ruas, Till Blume","submitted_at":"2022-03-28T07:35:26Z","abstract_excerpt":"Document embeddings and similarity measures underpin content-based recommender systems, whereby a document is commonly represented as a single generic embedding. However, similarity computed on single vector representations provides only one perspective on document similarity that ignores which aspects make two documents alike. To address this limitation, aspect-based similarity measures have been developed using document segmentation or pairwise multi-class document classification. While segmentation harms the document coherence, the pairwise classification approach scales poorly to large sca"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2203.14541","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/2203.14541/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":"2026-07-05T04:09:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HNEYSr/bmjt0hLHFhMFYp/YPZwAeV76tW26pfQi/bK5mu2qSWvxkvfFzqz42jSY/ivSYzo8H71enxfrprdx6Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T06:40:25.419012Z"},"content_sha256":"2621485b7e791824012c41fb10ecfa8979b53414570033affa0791ff2350e357","schema_version":"1.0","event_id":"sha256:2621485b7e791824012c41fb10ecfa8979b53414570033affa0791ff2350e357"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/65PTU7A4BDKKIC2VQOFYSRBCFH/bundle.json","state_url":"https://pith.science/pith/65PTU7A4BDKKIC2VQOFYSRBCFH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/65PTU7A4BDKKIC2VQOFYSRBCFH/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":"2026-07-07T06:40:25Z","links":{"resolver":"https://pith.science/pith/65PTU7A4BDKKIC2VQOFYSRBCFH","bundle":"https://pith.science/pith/65PTU7A4BDKKIC2VQOFYSRBCFH/bundle.json","state":"https://pith.science/pith/65PTU7A4BDKKIC2VQOFYSRBCFH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/65PTU7A4BDKKIC2VQOFYSRBCFH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:65PTU7A4BDKKIC2VQOFYSRBCFH","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":"9e399b5e6d3d677b7a56a595a366ee05d6cc83b53b4e9599b83842006e00183c","cross_cats_sorted":["cs.CL"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.IR","submitted_at":"2022-03-28T07:35:26Z","title_canon_sha256":"df30a4a1065dfa7ac2644649b0b7969a73ca9b5f1fcf50b30ac9ea8fbaccd305"},"schema_version":"1.0","source":{"id":"2203.14541","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2203.14541","created_at":"2026-07-05T04:09:06Z"},{"alias_kind":"arxiv_version","alias_value":"2203.14541v1","created_at":"2026-07-05T04:09:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2203.14541","created_at":"2026-07-05T04:09:06Z"},{"alias_kind":"pith_short_12","alias_value":"65PTU7A4BDKK","created_at":"2026-07-05T04:09:06Z"},{"alias_kind":"pith_short_16","alias_value":"65PTU7A4BDKKIC2V","created_at":"2026-07-05T04:09:06Z"},{"alias_kind":"pith_short_8","alias_value":"65PTU7A4","created_at":"2026-07-05T04:09:06Z"}],"graph_snapshots":[{"event_id":"sha256:2621485b7e791824012c41fb10ecfa8979b53414570033affa0791ff2350e357","target":"graph","created_at":"2026-07-05T04:09:06Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2203.14541/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Document embeddings and similarity measures underpin content-based recommender systems, whereby a document is commonly represented as a single generic embedding. However, similarity computed on single vector representations provides only one perspective on document similarity that ignores which aspects make two documents alike. To address this limitation, aspect-based similarity measures have been developed using document segmentation or pairwise multi-class document classification. While segmentation harms the document coherence, the pairwise classification approach scales poorly to large sca","authors_text":"Bela Gipp, Georg Rehm, Malte Ostendorff, Terry Ruas, Till Blume","cross_cats":["cs.CL"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.IR","submitted_at":"2022-03-28T07:35:26Z","title":"Specialized Document Embeddings for Aspect-based Similarity of Research Papers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2203.14541","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:b05e7fd8c31d43b663db7168d8f57d18e4779eb6f3dedaff5f81a015f7a46b9c","target":"record","created_at":"2026-07-05T04:09:06Z","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":"9e399b5e6d3d677b7a56a595a366ee05d6cc83b53b4e9599b83842006e00183c","cross_cats_sorted":["cs.CL"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.IR","submitted_at":"2022-03-28T07:35:26Z","title_canon_sha256":"df30a4a1065dfa7ac2644649b0b7969a73ca9b5f1fcf50b30ac9ea8fbaccd305"},"schema_version":"1.0","source":{"id":"2203.14541","kind":"arxiv","version":1}},"canonical_sha256":"f75f3a7c1c08d4a40b55838b89442229fab100719ea4684d8a2917e7316d883a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f75f3a7c1c08d4a40b55838b89442229fab100719ea4684d8a2917e7316d883a","first_computed_at":"2026-07-05T04:09:06.297511Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:09:06.297511Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"h6rsdqRpUz/byJQnD+RBJmJfdwFZ7BktD/qvBcqSfWowmg/POtp1Fqv3KA/e9MquexwqBpByyBz2XaAQ0hr8Cg==","signature_status":"signed_v1","signed_at":"2026-07-05T04:09:06.297987Z","signed_message":"canonical_sha256_bytes"},"source_id":"2203.14541","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b05e7fd8c31d43b663db7168d8f57d18e4779eb6f3dedaff5f81a015f7a46b9c","sha256:2621485b7e791824012c41fb10ecfa8979b53414570033affa0791ff2350e357"],"state_sha256":"bd3f70e521f6061838b67498d44f6819906018bbaa67a72b613f3ce5b2e3e0b1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FkCBWWkOTbUtvewUCeVxoXlO1s4X+UJlcqj1Gvto6bB3gChFL8zqTSsYjnTq7LtSLBjDQwuU7eFA1sOL65eYDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T06:40:25.421132Z","bundle_sha256":"5ad0639b105c554371fc90438a2a9dc5acff27652349d1f901f8aea1d2017715"}}