{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:DFV7JOTIJVGSOUBVAST5PJES2S","short_pith_number":"pith:DFV7JOTI","canonical_record":{"source":{"id":"1209.3756","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DB","submitted_at":"2012-09-17T19:10:38Z","cross_cats_sorted":[],"title_canon_sha256":"31a1fe5bc23d2ff9955f9eb8d21a7be0038f0cec8050f367b6933229a40556a4","abstract_canon_sha256":"09bbfcc2747d9767c190afce587dac97ba92c08613982ef08dca642217df0d4b"},"schema_version":"1.0"},"canonical_sha256":"196bf4ba684d4d27503504a7d7a492d4b6f125deb0b5a339199392925d6c1b80","source":{"kind":"arxiv","id":"1209.3756","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1209.3756","created_at":"2026-05-18T03:38:13Z"},{"alias_kind":"arxiv_version","alias_value":"1209.3756v3","created_at":"2026-05-18T03:38:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.3756","created_at":"2026-05-18T03:38:13Z"},{"alias_kind":"pith_short_12","alias_value":"DFV7JOTIJVGS","created_at":"2026-05-18T12:27:04Z"},{"alias_kind":"pith_short_16","alias_value":"DFV7JOTIJVGSOUBV","created_at":"2026-05-18T12:27:04Z"},{"alias_kind":"pith_short_8","alias_value":"DFV7JOTI","created_at":"2026-05-18T12:27:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:DFV7JOTIJVGSOUBVAST5PJES2S","target":"record","payload":{"canonical_record":{"source":{"id":"1209.3756","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DB","submitted_at":"2012-09-17T19:10:38Z","cross_cats_sorted":[],"title_canon_sha256":"31a1fe5bc23d2ff9955f9eb8d21a7be0038f0cec8050f367b6933229a40556a4","abstract_canon_sha256":"09bbfcc2747d9767c190afce587dac97ba92c08613982ef08dca642217df0d4b"},"schema_version":"1.0"},"canonical_sha256":"196bf4ba684d4d27503504a7d7a492d4b6f125deb0b5a339199392925d6c1b80","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:38:13.898092Z","signature_b64":"hgPN6Auc14yALo2LFNy/914sjWaC+zMcLP05veT5a+Vr5/WYN+WXbPafBo4wbJicBJhmbBxmwONr9cySdzKiAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"196bf4ba684d4d27503504a7d7a492d4b6f125deb0b5a339199392925d6c1b80","last_reissued_at":"2026-05-18T03:38:13.897601Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:38:13.897601Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1209.3756","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:38:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lrlydyoAA674H/ni+gorwy8wX6IVm6PE5lyiWbJGeoJKYNoFW2kBJgYO10DiSQKwRAJQseAwawC4BdKCWs1nAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T05:32:45.735404Z"},"content_sha256":"a0e9f70ce3ab2410dbfa3ee30e8bccec82d912c20d85f5b99c3410bf384dd805","schema_version":"1.0","event_id":"sha256:a0e9f70ce3ab2410dbfa3ee30e8bccec82d912c20d85f5b99c3410bf384dd805"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:DFV7JOTIJVGSOUBVAST5PJES2S","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Incomplete Information in RDF","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.DB","authors_text":"Charalampos Nikolaou, Manolis Koubarakis","submitted_at":"2012-09-17T19:10:38Z","abstract_excerpt":"We extend RDF with the ability to represent property values that exist, but are unknown or partially known, using constraints. Following ideas from the incomplete information literature, we develop a semantics for this extension of RDF, called RDFi, and study SPARQL query evaluation in this framework."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.3756","kind":"arxiv","version":3},"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":"2026-05-18T03:38:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ylcV48uxWP+1OZT6xJGdLD3eBg/ZYnN9bArmPjc/RDZ0h/7PwgV6N82K8Aaa553q9UJ/bYhzNpqu+wGeQyRrBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T05:32:45.735784Z"},"content_sha256":"cf885b09ad02d411a5688e2f79008ebf891d68b9a65b3dd43678e88560da08f6","schema_version":"1.0","event_id":"sha256:cf885b09ad02d411a5688e2f79008ebf891d68b9a65b3dd43678e88560da08f6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DFV7JOTIJVGSOUBVAST5PJES2S/bundle.json","state_url":"https://pith.science/pith/DFV7JOTIJVGSOUBVAST5PJES2S/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DFV7JOTIJVGSOUBVAST5PJES2S/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":"2026-06-03T05:32:45Z","links":{"resolver":"https://pith.science/pith/DFV7JOTIJVGSOUBVAST5PJES2S","bundle":"https://pith.science/pith/DFV7JOTIJVGSOUBVAST5PJES2S/bundle.json","state":"https://pith.science/pith/DFV7JOTIJVGSOUBVAST5PJES2S/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DFV7JOTIJVGSOUBVAST5PJES2S/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:DFV7JOTIJVGSOUBVAST5PJES2S","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":"09bbfcc2747d9767c190afce587dac97ba92c08613982ef08dca642217df0d4b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DB","submitted_at":"2012-09-17T19:10:38Z","title_canon_sha256":"31a1fe5bc23d2ff9955f9eb8d21a7be0038f0cec8050f367b6933229a40556a4"},"schema_version":"1.0","source":{"id":"1209.3756","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1209.3756","created_at":"2026-05-18T03:38:13Z"},{"alias_kind":"arxiv_version","alias_value":"1209.3756v3","created_at":"2026-05-18T03:38:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.3756","created_at":"2026-05-18T03:38:13Z"},{"alias_kind":"pith_short_12","alias_value":"DFV7JOTIJVGS","created_at":"2026-05-18T12:27:04Z"},{"alias_kind":"pith_short_16","alias_value":"DFV7JOTIJVGSOUBV","created_at":"2026-05-18T12:27:04Z"},{"alias_kind":"pith_short_8","alias_value":"DFV7JOTI","created_at":"2026-05-18T12:27:04Z"}],"graph_snapshots":[{"event_id":"sha256:cf885b09ad02d411a5688e2f79008ebf891d68b9a65b3dd43678e88560da08f6","target":"graph","created_at":"2026-05-18T03:38:13Z","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 extend RDF with the ability to represent property values that exist, but are unknown or partially known, using constraints. Following ideas from the incomplete information literature, we develop a semantics for this extension of RDF, called RDFi, and study SPARQL query evaluation in this framework.","authors_text":"Charalampos Nikolaou, Manolis Koubarakis","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DB","submitted_at":"2012-09-17T19:10:38Z","title":"Incomplete Information in RDF"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.3756","kind":"arxiv","version":3},"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:a0e9f70ce3ab2410dbfa3ee30e8bccec82d912c20d85f5b99c3410bf384dd805","target":"record","created_at":"2026-05-18T03:38:13Z","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":"09bbfcc2747d9767c190afce587dac97ba92c08613982ef08dca642217df0d4b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DB","submitted_at":"2012-09-17T19:10:38Z","title_canon_sha256":"31a1fe5bc23d2ff9955f9eb8d21a7be0038f0cec8050f367b6933229a40556a4"},"schema_version":"1.0","source":{"id":"1209.3756","kind":"arxiv","version":3}},"canonical_sha256":"196bf4ba684d4d27503504a7d7a492d4b6f125deb0b5a339199392925d6c1b80","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"196bf4ba684d4d27503504a7d7a492d4b6f125deb0b5a339199392925d6c1b80","first_computed_at":"2026-05-18T03:38:13.897601Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:38:13.897601Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hgPN6Auc14yALo2LFNy/914sjWaC+zMcLP05veT5a+Vr5/WYN+WXbPafBo4wbJicBJhmbBxmwONr9cySdzKiAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:38:13.898092Z","signed_message":"canonical_sha256_bytes"},"source_id":"1209.3756","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a0e9f70ce3ab2410dbfa3ee30e8bccec82d912c20d85f5b99c3410bf384dd805","sha256:cf885b09ad02d411a5688e2f79008ebf891d68b9a65b3dd43678e88560da08f6"],"state_sha256":"553ac3f35add1d34d6828c27d685d702be9ed6fa05d2a01af64795a5f3e77833"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JI2bov2dMYTfuPN2l8uepDPnFekiGVX3l5l1YMHnd389ij0ZlqYlMcLbfaSainrJ2X0X6z0MSBsdsaD4yMX5BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T05:32:45.737722Z","bundle_sha256":"9a5f0af390c0f47cb3d39ed081433de3f600dbbb89a768f6dde24b916daab387"}}