{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:NDD6W7BWHK5PEGQARGEZG5NZ7S","short_pith_number":"pith:NDD6W7BW","canonical_record":{"source":{"id":"2101.06141","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.IR","submitted_at":"2021-01-15T14:40:34Z","cross_cats_sorted":["cs.CY"],"title_canon_sha256":"8e81bece3281678b905886076f1083c1ff123772a0acd2bd90d8581f98a73bbe","abstract_canon_sha256":"7c9db0bebf72472c24996a2922c6a27e11252433649e8bcb7905bc1584aca53a"},"schema_version":"1.0"},"canonical_sha256":"68c7eb7c363abaf21a0089899375b9fc8892d023d9d0d7a28b6dd5f584228a5c","source":{"kind":"arxiv","id":"2101.06141","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2101.06141","created_at":"2026-07-05T02:26:02Z"},{"alias_kind":"arxiv_version","alias_value":"2101.06141v2","created_at":"2026-07-05T02:26:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2101.06141","created_at":"2026-07-05T02:26:02Z"},{"alias_kind":"pith_short_12","alias_value":"NDD6W7BWHK5P","created_at":"2026-07-05T02:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"NDD6W7BWHK5PEGQA","created_at":"2026-07-05T02:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"NDD6W7BW","created_at":"2026-07-05T02:26:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:NDD6W7BWHK5PEGQARGEZG5NZ7S","target":"record","payload":{"canonical_record":{"source":{"id":"2101.06141","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.IR","submitted_at":"2021-01-15T14:40:34Z","cross_cats_sorted":["cs.CY"],"title_canon_sha256":"8e81bece3281678b905886076f1083c1ff123772a0acd2bd90d8581f98a73bbe","abstract_canon_sha256":"7c9db0bebf72472c24996a2922c6a27e11252433649e8bcb7905bc1584aca53a"},"schema_version":"1.0"},"canonical_sha256":"68c7eb7c363abaf21a0089899375b9fc8892d023d9d0d7a28b6dd5f584228a5c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:26:02.819924Z","signature_b64":"EvZJAx7NHbKHXc5Oiw0PILPJdwuWC4HH5Fowc3HIsB6brQKl3zQcQDB90b5AwdE2QD2GvCiwSGXRHKFIFCMjDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"68c7eb7c363abaf21a0089899375b9fc8892d023d9d0d7a28b6dd5f584228a5c","last_reissued_at":"2026-07-05T02:26:02.819441Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:26:02.819441Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2101.06141","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":"2026-07-05T02:26:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yUivMEvI9kykXt2PX6tK4mkmDjFunoDcbaVlHYTONZcjZu8stZU/GQOhzF3RgiLWd47YPbBpAGlOGdrMrJA2AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T22:24:36.750111Z"},"content_sha256":"d310c5828a0554e8c4f95cb4973ac0bef464341be708d7b1fec4ac6c3722f04a","schema_version":"1.0","event_id":"sha256:d310c5828a0554e8c4f95cb4973ac0bef464341be708d7b1fec4ac6c3722f04a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:NDD6W7BWHK5PEGQARGEZG5NZ7S","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Operationalizing Framing to Support Multiperspective Recommendations of Opinion Pieces","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.CY"],"primary_cat":"cs.IR","authors_text":"Jasper Oosterman, Mats Mulder, Nava Tintarev, Oana Inel","submitted_at":"2021-01-15T14:40:34Z","abstract_excerpt":"Diversity in personalized news recommender systems is often defined as dissimilarity, and based on topic diversity (e.g., corona versus farmers strike). Diversity in news media, however, is understood as multiperspectivity (e.g., different opinions on corona measures), and arguably a key responsibility of the press in a democratic society. While viewpoint diversity is often considered synonymous with source diversity in communication science domain, in this paper, we take a computational view. We operationalize the notion of framing, adopted from communication science. We apply this notion to "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2101.06141","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2101.06141/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":"2026-07-05T02:26:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SNZY8oX2wvdx5P3IiixKzOBvGxXxq7dpqHwSY2BZrJUuadQwodKPquhRlTEmBMBY3+PgOJdGr8WqAj340S8AAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T22:24:36.751094Z"},"content_sha256":"0775f87a07a20427b3937aed243967a52ade512c0b4ccb1837ca9cff5926d8c1","schema_version":"1.0","event_id":"sha256:0775f87a07a20427b3937aed243967a52ade512c0b4ccb1837ca9cff5926d8c1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NDD6W7BWHK5PEGQARGEZG5NZ7S/bundle.json","state_url":"https://pith.science/pith/NDD6W7BWHK5PEGQARGEZG5NZ7S/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NDD6W7BWHK5PEGQARGEZG5NZ7S/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":"2026-08-14T22:24:36Z","links":{"resolver":"https://pith.science/pith/NDD6W7BWHK5PEGQARGEZG5NZ7S","bundle":"https://pith.science/pith/NDD6W7BWHK5PEGQARGEZG5NZ7S/bundle.json","state":"https://pith.science/pith/NDD6W7BWHK5PEGQARGEZG5NZ7S/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NDD6W7BWHK5PEGQARGEZG5NZ7S/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:NDD6W7BWHK5PEGQARGEZG5NZ7S","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":"7c9db0bebf72472c24996a2922c6a27e11252433649e8bcb7905bc1584aca53a","cross_cats_sorted":["cs.CY"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.IR","submitted_at":"2021-01-15T14:40:34Z","title_canon_sha256":"8e81bece3281678b905886076f1083c1ff123772a0acd2bd90d8581f98a73bbe"},"schema_version":"1.0","source":{"id":"2101.06141","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2101.06141","created_at":"2026-07-05T02:26:02Z"},{"alias_kind":"arxiv_version","alias_value":"2101.06141v2","created_at":"2026-07-05T02:26:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2101.06141","created_at":"2026-07-05T02:26:02Z"},{"alias_kind":"pith_short_12","alias_value":"NDD6W7BWHK5P","created_at":"2026-07-05T02:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"NDD6W7BWHK5PEGQA","created_at":"2026-07-05T02:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"NDD6W7BW","created_at":"2026-07-05T02:26:02Z"}],"graph_snapshots":[{"event_id":"sha256:0775f87a07a20427b3937aed243967a52ade512c0b4ccb1837ca9cff5926d8c1","target":"graph","created_at":"2026-07-05T02:26:02Z","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/2101.06141/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Diversity in personalized news recommender systems is often defined as dissimilarity, and based on topic diversity (e.g., corona versus farmers strike). Diversity in news media, however, is understood as multiperspectivity (e.g., different opinions on corona measures), and arguably a key responsibility of the press in a democratic society. While viewpoint diversity is often considered synonymous with source diversity in communication science domain, in this paper, we take a computational view. We operationalize the notion of framing, adopted from communication science. We apply this notion to ","authors_text":"Jasper Oosterman, Mats Mulder, Nava Tintarev, Oana Inel","cross_cats":["cs.CY"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.IR","submitted_at":"2021-01-15T14:40:34Z","title":"Operationalizing Framing to Support Multiperspective Recommendations of Opinion Pieces"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2101.06141","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:d310c5828a0554e8c4f95cb4973ac0bef464341be708d7b1fec4ac6c3722f04a","target":"record","created_at":"2026-07-05T02:26:02Z","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":"7c9db0bebf72472c24996a2922c6a27e11252433649e8bcb7905bc1584aca53a","cross_cats_sorted":["cs.CY"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.IR","submitted_at":"2021-01-15T14:40:34Z","title_canon_sha256":"8e81bece3281678b905886076f1083c1ff123772a0acd2bd90d8581f98a73bbe"},"schema_version":"1.0","source":{"id":"2101.06141","kind":"arxiv","version":2}},"canonical_sha256":"68c7eb7c363abaf21a0089899375b9fc8892d023d9d0d7a28b6dd5f584228a5c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"68c7eb7c363abaf21a0089899375b9fc8892d023d9d0d7a28b6dd5f584228a5c","first_computed_at":"2026-07-05T02:26:02.819441Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:26:02.819441Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"EvZJAx7NHbKHXc5Oiw0PILPJdwuWC4HH5Fowc3HIsB6brQKl3zQcQDB90b5AwdE2QD2GvCiwSGXRHKFIFCMjDw==","signature_status":"signed_v1","signed_at":"2026-07-05T02:26:02.819924Z","signed_message":"canonical_sha256_bytes"},"source_id":"2101.06141","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d310c5828a0554e8c4f95cb4973ac0bef464341be708d7b1fec4ac6c3722f04a","sha256:0775f87a07a20427b3937aed243967a52ade512c0b4ccb1837ca9cff5926d8c1"],"state_sha256":"efaa7fedbcb70ecb82e1f42e25f201b5d03e343b20d31856b430e609c739f727"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kHa6WTVJHn40paUtqDmp+6ZQdrrCBS5VccMBfmbmROpx0/QQTSDHkkxXVGKUTMjds/KVdn6T3i9YkgABqfymCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-14T22:24:36.759122Z","bundle_sha256":"3ade2fb09b0b52884e7b4fd87ddd3dc44b6bef54897cb1ec4e9f94d74b67862d"}}