{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2016:HJJNQDWTFTBLSJKQRCYAAHJDCL","short_pith_number":"pith:HJJNQDWT","schema_version":"1.0","canonical_sha256":"3a52d80ed32cc2b9255088b0001d2312eef16e1485cd93c7848774341a855435","source":{"kind":"arxiv","id":"1607.07967","version":2},"attestation_state":"computed","paper":{"title":"PIWD: A Plugin-based Framework for Well-Designed SPARQL","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.DB","authors_text":"Xiaowang Zhang, Xin Wang, Zhenyu Song, Zhiyong Feng","submitted_at":"2016-07-27T05:47:34Z","abstract_excerpt":"In the real world datasets (e.g.,DBpedia query log), queries built on well-designed patterns containing only AND and OPT operators (for short, WDAO-patterns) account for a large proportion among all SPARQL queries. In this paper, we present a plugin-based framework for all SELECT queries built on WDAO-patterns, named PIWD. The framework is based on a parse tree called \\emph{well-designed AND-OPT tree} (for short, WDAO-tree) whose leaves are basic graph patterns (BGP) and inner nodes are the OPT operators. We prove that for any WDAO-pattern, its parse tree can be equivalently transformed into a"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1607.07967","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DB","submitted_at":"2016-07-27T05:47:34Z","cross_cats_sorted":[],"title_canon_sha256":"4db6ea01560cc4e5a35f98de1f4ceb9d38c9c35522129850ac4138ac992927ea","abstract_canon_sha256":"8dd3c03b078e8d09a3a915371212ca1fca22ce44df9b0bf7e44394b3922d9e6d"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:02:58.848066Z","signature_b64":"2RHS3oFndFGXbWl6axANKBYq8VrWkAT/3EDZwcx4NKcQXVyy4XmX7pmuzLtLXgnd1kIQlk55XaqDfnLEeqG3CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3a52d80ed32cc2b9255088b0001d2312eef16e1485cd93c7848774341a855435","last_reissued_at":"2026-05-18T01:02:58.847484Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:02:58.847484Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"PIWD: A Plugin-based Framework for Well-Designed SPARQL","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.DB","authors_text":"Xiaowang Zhang, Xin Wang, Zhenyu Song, Zhiyong Feng","submitted_at":"2016-07-27T05:47:34Z","abstract_excerpt":"In the real world datasets (e.g.,DBpedia query log), queries built on well-designed patterns containing only AND and OPT operators (for short, WDAO-patterns) account for a large proportion among all SPARQL queries. In this paper, we present a plugin-based framework for all SELECT queries built on WDAO-patterns, named PIWD. The framework is based on a parse tree called \\emph{well-designed AND-OPT tree} (for short, WDAO-tree) whose leaves are basic graph patterns (BGP) and inner nodes are the OPT operators. We prove that for any WDAO-pattern, its parse tree can be equivalently transformed into a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.07967","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1607.07967","created_at":"2026-05-18T01:02:58.847561+00:00"},{"alias_kind":"arxiv_version","alias_value":"1607.07967v2","created_at":"2026-05-18T01:02:58.847561+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.07967","created_at":"2026-05-18T01:02:58.847561+00:00"},{"alias_kind":"pith_short_12","alias_value":"HJJNQDWTFTBL","created_at":"2026-05-18T12:30:19.053100+00:00"},{"alias_kind":"pith_short_16","alias_value":"HJJNQDWTFTBLSJKQ","created_at":"2026-05-18T12:30:19.053100+00:00"},{"alias_kind":"pith_short_8","alias_value":"HJJNQDWT","created_at":"2026-05-18T12:30:19.053100+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/HJJNQDWTFTBLSJKQRCYAAHJDCL","json":"https://pith.science/pith/HJJNQDWTFTBLSJKQRCYAAHJDCL.json","graph_json":"https://pith.science/api/pith-number/HJJNQDWTFTBLSJKQRCYAAHJDCL/graph.json","events_json":"https://pith.science/api/pith-number/HJJNQDWTFTBLSJKQRCYAAHJDCL/events.json","paper":"https://pith.science/paper/HJJNQDWT"},"agent_actions":{"view_html":"https://pith.science/pith/HJJNQDWTFTBLSJKQRCYAAHJDCL","download_json":"https://pith.science/pith/HJJNQDWTFTBLSJKQRCYAAHJDCL.json","view_paper":"https://pith.science/paper/HJJNQDWT","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1607.07967&json=true","fetch_graph":"https://pith.science/api/pith-number/HJJNQDWTFTBLSJKQRCYAAHJDCL/graph.json","fetch_events":"https://pith.science/api/pith-number/HJJNQDWTFTBLSJKQRCYAAHJDCL/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/HJJNQDWTFTBLSJKQRCYAAHJDCL/action/timestamp_anchor","attest_storage":"https://pith.science/pith/HJJNQDWTFTBLSJKQRCYAAHJDCL/action/storage_attestation","attest_author":"https://pith.science/pith/HJJNQDWTFTBLSJKQRCYAAHJDCL/action/author_attestation","sign_citation":"https://pith.science/pith/HJJNQDWTFTBLSJKQRCYAAHJDCL/action/citation_signature","submit_replication":"https://pith.science/pith/HJJNQDWTFTBLSJKQRCYAAHJDCL/action/replication_record"}},"created_at":"2026-05-18T01:02:58.847561+00:00","updated_at":"2026-05-18T01:02:58.847561+00:00"}