{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:7R32IYBPFGVZ6GVDHN2SQXS2A4","short_pith_number":"pith:7R32IYBP","canonical_record":{"source":{"id":"1808.08822","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DB","submitted_at":"2018-08-27T12:42:38Z","cross_cats_sorted":[],"title_canon_sha256":"040078099651df7b282f2098d49f179ffa1df03ba4ddb4fd7631ba4be014db51","abstract_canon_sha256":"b506530d63a83361b7d8cfb0bf96331e0143644237927c7c7c02cf98a93e9efa"},"schema_version":"1.0"},"canonical_sha256":"fc77a4602f29ab9f1aa33b75285e5a0717f394f8c04d0a2e05463d0880133842","source":{"kind":"arxiv","id":"1808.08822","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.08822","created_at":"2026-05-17T23:52:24Z"},{"alias_kind":"arxiv_version","alias_value":"1808.08822v2","created_at":"2026-05-17T23:52:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.08822","created_at":"2026-05-17T23:52:24Z"},{"alias_kind":"pith_short_12","alias_value":"7R32IYBPFGVZ","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_16","alias_value":"7R32IYBPFGVZ6GVD","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_8","alias_value":"7R32IYBP","created_at":"2026-05-18T12:32:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:7R32IYBPFGVZ6GVDHN2SQXS2A4","target":"record","payload":{"canonical_record":{"source":{"id":"1808.08822","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DB","submitted_at":"2018-08-27T12:42:38Z","cross_cats_sorted":[],"title_canon_sha256":"040078099651df7b282f2098d49f179ffa1df03ba4ddb4fd7631ba4be014db51","abstract_canon_sha256":"b506530d63a83361b7d8cfb0bf96331e0143644237927c7c7c02cf98a93e9efa"},"schema_version":"1.0"},"canonical_sha256":"fc77a4602f29ab9f1aa33b75285e5a0717f394f8c04d0a2e05463d0880133842","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:52:24.226487Z","signature_b64":"U/Jy0nB5VBkrk1cC3oOvKpLwA9vNdi7ykpbikef9bFWFxUsoW9m5CbQ5taZG0sLxiEGVYQrK928nl0SbX35pCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fc77a4602f29ab9f1aa33b75285e5a0717f394f8c04d0a2e05463d0880133842","last_reissued_at":"2026-05-17T23:52:24.225943Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:52:24.225943Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1808.08822","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":"2026-05-17T23:52:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hicOAx3YwxxYkQJ0QSJm6XPCIdVZwuR/JRM3gK3RGxqon457HK8xYmEQhzps/0ArUkJsQP3+3r0boub4ov8DCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T05:59:46.271861Z"},"content_sha256":"f5a77e50a5b153b023c6f9badb7a585319237c32594a388732fab17602f42191","schema_version":"1.0","event_id":"sha256:f5a77e50a5b153b023c6f9badb7a585319237c32594a388732fab17602f42191"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:7R32IYBPFGVZ6GVDHN2SQXS2A4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Monotone Preservation Result for Boolean Queries Expressed as a Containment of Conjunctive Queries","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.DB","authors_text":"Dimitri Surinx, Jan Van den Bussche","submitted_at":"2018-08-27T12:42:38Z","abstract_excerpt":"When a relational database is queried, the result is normally a relation. Some queries, however, only require a yes/no answer; such queries are often called boolean queries. It is customary in database theory to express boolean queries by testing nonemptiness of query expressions. Another interesting way for expressing boolean queries are containment statements of the form $Q_1 \\subseteq Q_2$ where $Q_1$ and $Q_2$ are query expressions. Here, for any input instance $I$, the boolean query result is $\\mathit{true}$ if $Q_1(I)$ is a subset of $Q_2(I)$ and $\\mathit{false}$ otherwise.\n  In the pres"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.08822","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":"2026-05-17T23:52:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aEVCvaQinn95dYc3q2xBLG7MzVdVIHCqZwHz7D5+QPEVLF/TtXajmrshMR/xjBd8+XQ6wRgxgzwu/nLMJ0xIAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T05:59:46.272520Z"},"content_sha256":"e5ba6601cb42b07ee3d60e3eecb51c9f20f83642257ce94ee9db06f609a9e33c","schema_version":"1.0","event_id":"sha256:e5ba6601cb42b07ee3d60e3eecb51c9f20f83642257ce94ee9db06f609a9e33c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7R32IYBPFGVZ6GVDHN2SQXS2A4/bundle.json","state_url":"https://pith.science/pith/7R32IYBPFGVZ6GVDHN2SQXS2A4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7R32IYBPFGVZ6GVDHN2SQXS2A4/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":"2026-06-07T05:59:46Z","links":{"resolver":"https://pith.science/pith/7R32IYBPFGVZ6GVDHN2SQXS2A4","bundle":"https://pith.science/pith/7R32IYBPFGVZ6GVDHN2SQXS2A4/bundle.json","state":"https://pith.science/pith/7R32IYBPFGVZ6GVDHN2SQXS2A4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7R32IYBPFGVZ6GVDHN2SQXS2A4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:7R32IYBPFGVZ6GVDHN2SQXS2A4","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":"b506530d63a83361b7d8cfb0bf96331e0143644237927c7c7c02cf98a93e9efa","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DB","submitted_at":"2018-08-27T12:42:38Z","title_canon_sha256":"040078099651df7b282f2098d49f179ffa1df03ba4ddb4fd7631ba4be014db51"},"schema_version":"1.0","source":{"id":"1808.08822","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.08822","created_at":"2026-05-17T23:52:24Z"},{"alias_kind":"arxiv_version","alias_value":"1808.08822v2","created_at":"2026-05-17T23:52:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.08822","created_at":"2026-05-17T23:52:24Z"},{"alias_kind":"pith_short_12","alias_value":"7R32IYBPFGVZ","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_16","alias_value":"7R32IYBPFGVZ6GVD","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_8","alias_value":"7R32IYBP","created_at":"2026-05-18T12:32:11Z"}],"graph_snapshots":[{"event_id":"sha256:e5ba6601cb42b07ee3d60e3eecb51c9f20f83642257ce94ee9db06f609a9e33c","target":"graph","created_at":"2026-05-17T23:52:24Z","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":"When a relational database is queried, the result is normally a relation. Some queries, however, only require a yes/no answer; such queries are often called boolean queries. It is customary in database theory to express boolean queries by testing nonemptiness of query expressions. Another interesting way for expressing boolean queries are containment statements of the form $Q_1 \\subseteq Q_2$ where $Q_1$ and $Q_2$ are query expressions. Here, for any input instance $I$, the boolean query result is $\\mathit{true}$ if $Q_1(I)$ is a subset of $Q_2(I)$ and $\\mathit{false}$ otherwise.\n  In the pres","authors_text":"Dimitri Surinx, Jan Van den Bussche","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DB","submitted_at":"2018-08-27T12:42:38Z","title":"A Monotone Preservation Result for Boolean Queries Expressed as a Containment of Conjunctive Queries"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.08822","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:f5a77e50a5b153b023c6f9badb7a585319237c32594a388732fab17602f42191","target":"record","created_at":"2026-05-17T23:52:24Z","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":"b506530d63a83361b7d8cfb0bf96331e0143644237927c7c7c02cf98a93e9efa","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DB","submitted_at":"2018-08-27T12:42:38Z","title_canon_sha256":"040078099651df7b282f2098d49f179ffa1df03ba4ddb4fd7631ba4be014db51"},"schema_version":"1.0","source":{"id":"1808.08822","kind":"arxiv","version":2}},"canonical_sha256":"fc77a4602f29ab9f1aa33b75285e5a0717f394f8c04d0a2e05463d0880133842","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fc77a4602f29ab9f1aa33b75285e5a0717f394f8c04d0a2e05463d0880133842","first_computed_at":"2026-05-17T23:52:24.225943Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:52:24.225943Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"U/Jy0nB5VBkrk1cC3oOvKpLwA9vNdi7ykpbikef9bFWFxUsoW9m5CbQ5taZG0sLxiEGVYQrK928nl0SbX35pCw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:52:24.226487Z","signed_message":"canonical_sha256_bytes"},"source_id":"1808.08822","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f5a77e50a5b153b023c6f9badb7a585319237c32594a388732fab17602f42191","sha256:e5ba6601cb42b07ee3d60e3eecb51c9f20f83642257ce94ee9db06f609a9e33c"],"state_sha256":"5422d9869fa5de58a837d46728be520c11f61b3afa03918b41c6fbab714e4832"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zEsKLToNCNVt7ZQO+LJ81JWl7eGhz5cRTvWv6pDh/ge+Yq/sB1HqCS3krF7iZ0TXfVXA4RNQY6tEKx1xGHp6DA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T05:59:46.275703Z","bundle_sha256":"1966bc7ec45d4d168b1e4302f8f26b903bbba06c9b45b51cfd29e261b43afa37"}}