{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:JEDB4XZTVA2W6BEQPALRLCUJY7","short_pith_number":"pith:JEDB4XZT","canonical_record":{"source":{"id":"1302.4888","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2013-02-20T12:37:33Z","cross_cats_sorted":["cs.AI"],"title_canon_sha256":"00a8a1521c4cd48dd3ce7058996776a9e8cf1ffc861f54c93cbfc351ea5e7f77","abstract_canon_sha256":"2911c00cbabd4e19a79e15a1e636ef5de18838817780dd5b5adac448f678dc45"},"schema_version":"1.0"},"canonical_sha256":"49061e5f33a8356f04907817158a89c7f0051e9f89333df046a1687eab18269f","source":{"kind":"arxiv","id":"1302.4888","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1302.4888","created_at":"2026-05-18T03:03:56Z"},{"alias_kind":"arxiv_version","alias_value":"1302.4888v2","created_at":"2026-05-18T03:03:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1302.4888","created_at":"2026-05-18T03:03:56Z"},{"alias_kind":"pith_short_12","alias_value":"JEDB4XZTVA2W","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_16","alias_value":"JEDB4XZTVA2W6BEQ","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_8","alias_value":"JEDB4XZT","created_at":"2026-05-18T12:27:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:JEDB4XZTVA2W6BEQPALRLCUJY7","target":"record","payload":{"canonical_record":{"source":{"id":"1302.4888","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2013-02-20T12:37:33Z","cross_cats_sorted":["cs.AI"],"title_canon_sha256":"00a8a1521c4cd48dd3ce7058996776a9e8cf1ffc861f54c93cbfc351ea5e7f77","abstract_canon_sha256":"2911c00cbabd4e19a79e15a1e636ef5de18838817780dd5b5adac448f678dc45"},"schema_version":"1.0"},"canonical_sha256":"49061e5f33a8356f04907817158a89c7f0051e9f89333df046a1687eab18269f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:03:56.875178Z","signature_b64":"7qq7c+XW0ORuMlSiwX1e9qxeXYzZNQ5Qm4SECzSl8unbHz3kBRad6p2z/IOqv85n5fw5lCHFRvXGylfyjliAAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"49061e5f33a8356f04907817158a89c7f0051e9f89333df046a1687eab18269f","last_reissued_at":"2026-05-18T03:03:56.874609Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:03:56.874609Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1302.4888","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":"2026-05-18T03:03:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cHYigu8t0DioUewruXlL+uE4DJyPuGuwp+9GZPLUEqNvzeBgfqYIa2aAe16OK5und6sYHVi+AYRrwv5umaVcCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T20:56:44.221428Z"},"content_sha256":"dbc3900ef40a5271756f857793096738ffae341e93bd0a70f5278e69d2fa3f36","schema_version":"1.0","event_id":"sha256:dbc3900ef40a5271756f857793096738ffae341e93bd0a70f5278e69d2fa3f36"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:JEDB4XZTVA2W6BEQPALRLCUJY7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Exploiting Social Tags for Cross-Domain Collaborative Filtering","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.AI"],"primary_cat":"cs.IR","authors_text":"Alan Hanjalic, Martha Larson, Yue Shi","submitted_at":"2013-02-20T12:37:33Z","abstract_excerpt":"One of the most challenging problems in recommender systems based on the collaborative filtering (CF) concept is data sparseness, i.e., limited user preference data is available for making recommendations. Cross-domain collaborative filtering (CDCF) has been studied as an effective mechanism to alleviate data sparseness of one domain using the knowledge about user preferences from other domains. A key question to be answered in the context of CDCF is what common characteristics can be deployed to link different domains for effective knowledge transfer. In this paper, we assess the usefulness o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1302.4888","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":"2026-05-18T03:03:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SkHChO8BGl1Ly7hCzO3T6gq/tsk0k+DIe9r4XvVm7r2diS8+YG2LlX5X5M0m2P+w1uiD31BALzwLP74GR4LpDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T20:56:44.222120Z"},"content_sha256":"1da099fbd7f7acf2a1f536a14eaa6885115d84ead944b0ffcc4a24c145c550fe","schema_version":"1.0","event_id":"sha256:1da099fbd7f7acf2a1f536a14eaa6885115d84ead944b0ffcc4a24c145c550fe"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JEDB4XZTVA2W6BEQPALRLCUJY7/bundle.json","state_url":"https://pith.science/pith/JEDB4XZTVA2W6BEQPALRLCUJY7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JEDB4XZTVA2W6BEQPALRLCUJY7/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":"2026-05-30T20:56:44Z","links":{"resolver":"https://pith.science/pith/JEDB4XZTVA2W6BEQPALRLCUJY7","bundle":"https://pith.science/pith/JEDB4XZTVA2W6BEQPALRLCUJY7/bundle.json","state":"https://pith.science/pith/JEDB4XZTVA2W6BEQPALRLCUJY7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JEDB4XZTVA2W6BEQPALRLCUJY7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:JEDB4XZTVA2W6BEQPALRLCUJY7","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":"2911c00cbabd4e19a79e15a1e636ef5de18838817780dd5b5adac448f678dc45","cross_cats_sorted":["cs.AI"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2013-02-20T12:37:33Z","title_canon_sha256":"00a8a1521c4cd48dd3ce7058996776a9e8cf1ffc861f54c93cbfc351ea5e7f77"},"schema_version":"1.0","source":{"id":"1302.4888","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1302.4888","created_at":"2026-05-18T03:03:56Z"},{"alias_kind":"arxiv_version","alias_value":"1302.4888v2","created_at":"2026-05-18T03:03:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1302.4888","created_at":"2026-05-18T03:03:56Z"},{"alias_kind":"pith_short_12","alias_value":"JEDB4XZTVA2W","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_16","alias_value":"JEDB4XZTVA2W6BEQ","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_8","alias_value":"JEDB4XZT","created_at":"2026-05-18T12:27:49Z"}],"graph_snapshots":[{"event_id":"sha256:1da099fbd7f7acf2a1f536a14eaa6885115d84ead944b0ffcc4a24c145c550fe","target":"graph","created_at":"2026-05-18T03:03:56Z","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":"One of the most challenging problems in recommender systems based on the collaborative filtering (CF) concept is data sparseness, i.e., limited user preference data is available for making recommendations. Cross-domain collaborative filtering (CDCF) has been studied as an effective mechanism to alleviate data sparseness of one domain using the knowledge about user preferences from other domains. A key question to be answered in the context of CDCF is what common characteristics can be deployed to link different domains for effective knowledge transfer. In this paper, we assess the usefulness o","authors_text":"Alan Hanjalic, Martha Larson, Yue Shi","cross_cats":["cs.AI"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2013-02-20T12:37:33Z","title":"Exploiting Social Tags for Cross-Domain Collaborative Filtering"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1302.4888","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:dbc3900ef40a5271756f857793096738ffae341e93bd0a70f5278e69d2fa3f36","target":"record","created_at":"2026-05-18T03:03:56Z","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":"2911c00cbabd4e19a79e15a1e636ef5de18838817780dd5b5adac448f678dc45","cross_cats_sorted":["cs.AI"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2013-02-20T12:37:33Z","title_canon_sha256":"00a8a1521c4cd48dd3ce7058996776a9e8cf1ffc861f54c93cbfc351ea5e7f77"},"schema_version":"1.0","source":{"id":"1302.4888","kind":"arxiv","version":2}},"canonical_sha256":"49061e5f33a8356f04907817158a89c7f0051e9f89333df046a1687eab18269f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"49061e5f33a8356f04907817158a89c7f0051e9f89333df046a1687eab18269f","first_computed_at":"2026-05-18T03:03:56.874609Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:03:56.874609Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7qq7c+XW0ORuMlSiwX1e9qxeXYzZNQ5Qm4SECzSl8unbHz3kBRad6p2z/IOqv85n5fw5lCHFRvXGylfyjliAAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:03:56.875178Z","signed_message":"canonical_sha256_bytes"},"source_id":"1302.4888","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dbc3900ef40a5271756f857793096738ffae341e93bd0a70f5278e69d2fa3f36","sha256:1da099fbd7f7acf2a1f536a14eaa6885115d84ead944b0ffcc4a24c145c550fe"],"state_sha256":"f04da3ec71fdfc0fccd25d4d24d06ea3025cc92342c9a4923020107687e3d770"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"R9IEIkrcOj9qoHuph1Qb2O22sNYRKIrZKhCtBo/nU7gSvBj1hOFUMuyJY1z2gLNFx84Yyw3n++Ak0vCYgZ0uAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T20:56:44.225557Z","bundle_sha256":"bacdbbdeced50feb3fc11471192710b9e62dd19bcc1f81012a1a945d00888afe"}}