{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:PNCBY2I75X62OEQ4Z3DCTQT3VG","short_pith_number":"pith:PNCBY2I7","canonical_record":{"source":{"id":"1402.0728","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2014-02-04T13:31:10Z","cross_cats_sorted":[],"title_canon_sha256":"8ddee5dfaf5dd8113857d88076adce996df00b9bf968d13a99045cce218cbd93","abstract_canon_sha256":"c408d4d9c7cf6526d4dc90c23cb055ba6352c96bd04df501d5b24f504bc1fbad"},"schema_version":"1.0"},"canonical_sha256":"7b441c691fedfda7121ccec629c27ba9897706fded5b328becb0cccb800d7746","source":{"kind":"arxiv","id":"1402.0728","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1402.0728","created_at":"2026-05-18T02:52:23Z"},{"alias_kind":"arxiv_version","alias_value":"1402.0728v2","created_at":"2026-05-18T02:52:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1402.0728","created_at":"2026-05-18T02:52:23Z"},{"alias_kind":"pith_short_12","alias_value":"PNCBY2I75X62","created_at":"2026-05-18T12:28:43Z"},{"alias_kind":"pith_short_16","alias_value":"PNCBY2I75X62OEQ4","created_at":"2026-05-18T12:28:43Z"},{"alias_kind":"pith_short_8","alias_value":"PNCBY2I7","created_at":"2026-05-18T12:28:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:PNCBY2I75X62OEQ4Z3DCTQT3VG","target":"record","payload":{"canonical_record":{"source":{"id":"1402.0728","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2014-02-04T13:31:10Z","cross_cats_sorted":[],"title_canon_sha256":"8ddee5dfaf5dd8113857d88076adce996df00b9bf968d13a99045cce218cbd93","abstract_canon_sha256":"c408d4d9c7cf6526d4dc90c23cb055ba6352c96bd04df501d5b24f504bc1fbad"},"schema_version":"1.0"},"canonical_sha256":"7b441c691fedfda7121ccec629c27ba9897706fded5b328becb0cccb800d7746","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:52:23.198350Z","signature_b64":"TNPW8WLyXC8KDL5j9t4sa/V6IyixVhunpy2evz/phHra8R2Ayq6BrxJf6IkzFyPsPkOlZh3DuWgXdxy3HSj9Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7b441c691fedfda7121ccec629c27ba9897706fded5b328becb0cccb800d7746","last_reissued_at":"2026-05-18T02:52:23.197636Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:52:23.197636Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1402.0728","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":"2026-05-18T02:52:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zdYJGl9WBte61cTNB+xKHNgHh0fSgMpKQZVgh9BFZ7iD6EvjmJGpWrib2jqYAVQhKXW22LO7jS3bW4QqSIQFAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T23:35:01.193342Z"},"content_sha256":"48403f0630be108e3ecca1c77bb274222658e3095631605a9051de7956c51811","schema_version":"1.0","event_id":"sha256:48403f0630be108e3ecca1c77bb274222658e3095631605a9051de7956c51811"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:PNCBY2I75X62OEQ4Z3DCTQT3VG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Forgetting the Words but Remembering the Meaning: Modeling Forgetting in a Verbal and Semantic Tag Recommender","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.IR","authors_text":"Christoph Trattner, Dominik Kowald, Paul Seitlinger, Tobias Ley","submitted_at":"2014-02-04T13:31:10Z","abstract_excerpt":"We assume that recommender systems are more successful, when they are based on a thorough understanding of how people process information. In the current paper we test this assumption in the context of social tagging systems. Cognitive research on how people assign tags has shown that they draw on two interconnected levels of knowledge in their memory: on a conceptual level of semantic fields or topics, and on a lexical level that turns patterns on the semantic level into words. Another strand of tagging research reveals a strong impact of time dependent forgetting on users' tag choices, such "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1402.0728","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":"2026-05-18T02:52:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5jwgusPflHWuTFehVYGHeZCH4kv3w+Uxs/jNPsdTOY3fhgp6IHn/dg38JsTEx6KbkjCyov5OnJrBiWM9w1gXCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T23:35:01.193712Z"},"content_sha256":"386ae04cc8ce80cc1fce4b711c4574d4a414b15832c932a0b999ec1abbf75020","schema_version":"1.0","event_id":"sha256:386ae04cc8ce80cc1fce4b711c4574d4a414b15832c932a0b999ec1abbf75020"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PNCBY2I75X62OEQ4Z3DCTQT3VG/bundle.json","state_url":"https://pith.science/pith/PNCBY2I75X62OEQ4Z3DCTQT3VG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PNCBY2I75X62OEQ4Z3DCTQT3VG/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":"2026-06-01T23:35:01Z","links":{"resolver":"https://pith.science/pith/PNCBY2I75X62OEQ4Z3DCTQT3VG","bundle":"https://pith.science/pith/PNCBY2I75X62OEQ4Z3DCTQT3VG/bundle.json","state":"https://pith.science/pith/PNCBY2I75X62OEQ4Z3DCTQT3VG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PNCBY2I75X62OEQ4Z3DCTQT3VG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:PNCBY2I75X62OEQ4Z3DCTQT3VG","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":"c408d4d9c7cf6526d4dc90c23cb055ba6352c96bd04df501d5b24f504bc1fbad","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2014-02-04T13:31:10Z","title_canon_sha256":"8ddee5dfaf5dd8113857d88076adce996df00b9bf968d13a99045cce218cbd93"},"schema_version":"1.0","source":{"id":"1402.0728","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1402.0728","created_at":"2026-05-18T02:52:23Z"},{"alias_kind":"arxiv_version","alias_value":"1402.0728v2","created_at":"2026-05-18T02:52:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1402.0728","created_at":"2026-05-18T02:52:23Z"},{"alias_kind":"pith_short_12","alias_value":"PNCBY2I75X62","created_at":"2026-05-18T12:28:43Z"},{"alias_kind":"pith_short_16","alias_value":"PNCBY2I75X62OEQ4","created_at":"2026-05-18T12:28:43Z"},{"alias_kind":"pith_short_8","alias_value":"PNCBY2I7","created_at":"2026-05-18T12:28:43Z"}],"graph_snapshots":[{"event_id":"sha256:386ae04cc8ce80cc1fce4b711c4574d4a414b15832c932a0b999ec1abbf75020","target":"graph","created_at":"2026-05-18T02:52:23Z","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":"We assume that recommender systems are more successful, when they are based on a thorough understanding of how people process information. In the current paper we test this assumption in the context of social tagging systems. Cognitive research on how people assign tags has shown that they draw on two interconnected levels of knowledge in their memory: on a conceptual level of semantic fields or topics, and on a lexical level that turns patterns on the semantic level into words. Another strand of tagging research reveals a strong impact of time dependent forgetting on users' tag choices, such ","authors_text":"Christoph Trattner, Dominik Kowald, Paul Seitlinger, Tobias Ley","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2014-02-04T13:31:10Z","title":"Forgetting the Words but Remembering the Meaning: Modeling Forgetting in a Verbal and Semantic Tag Recommender"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1402.0728","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":"sha256:48403f0630be108e3ecca1c77bb274222658e3095631605a9051de7956c51811","target":"record","created_at":"2026-05-18T02:52:23Z","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":"c408d4d9c7cf6526d4dc90c23cb055ba6352c96bd04df501d5b24f504bc1fbad","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2014-02-04T13:31:10Z","title_canon_sha256":"8ddee5dfaf5dd8113857d88076adce996df00b9bf968d13a99045cce218cbd93"},"schema_version":"1.0","source":{"id":"1402.0728","kind":"arxiv","version":2}},"canonical_sha256":"7b441c691fedfda7121ccec629c27ba9897706fded5b328becb0cccb800d7746","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7b441c691fedfda7121ccec629c27ba9897706fded5b328becb0cccb800d7746","first_computed_at":"2026-05-18T02:52:23.197636Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:52:23.197636Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TNPW8WLyXC8KDL5j9t4sa/V6IyixVhunpy2evz/phHra8R2Ayq6BrxJf6IkzFyPsPkOlZh3DuWgXdxy3HSj9Dw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:52:23.198350Z","signed_message":"canonical_sha256_bytes"},"source_id":"1402.0728","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:48403f0630be108e3ecca1c77bb274222658e3095631605a9051de7956c51811","sha256:386ae04cc8ce80cc1fce4b711c4574d4a414b15832c932a0b999ec1abbf75020"],"state_sha256":"6bc739f14ee6b222a4f203128aca3eeeffed20a6b80c89542271fcbca1ce3dd4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"F/KmAlcDPSLvF71Do4HSTWRzu5mMiI48DTM4L5lnXfK+uh5avD9xIjaCQrLESa6L1eolfU7dSLmIcdc7XsAaCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T23:35:01.195589Z","bundle_sha256":"8c68b5a9911675ca3296e8f0f2493006d45f87b54b9a843ef837a3dfe236a75a"}}