{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2011:NCXPMJ34YFQNDFAPNHGWCBAKN5","short_pith_number":"pith:NCXPMJ34","schema_version":"1.0","canonical_sha256":"68aef6277cc160d1940f69cd61040a6f4f1bf215519a0902aa2705badf64d5a0","source":{"kind":"arxiv","id":"1201.0027","version":1},"attestation_state":"computed","paper":{"title":"The C++0x \"Concepts\" Effort","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.PL","authors_text":"Jeremy G. Siek","submitted_at":"2011-12-29T21:38:55Z","abstract_excerpt":"C++0x is the working title for the revision of the ISO standard of the C++ programming language that was originally planned for release in 2009 but that was delayed to 2011. The largest language extension in C++0x was \"concepts\", that is, a collection of features for constraining template parameters. In September of 2008, the C++ standards committee voted the concepts extension into C++0x, but then in July of 2009, the committee voted the concepts extension back out of C++0x.\n  This article is my account of the technical challenges and debates within the \"concepts\" effort in the years 2003 to "},"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":"1201.0027","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2011-12-29T21:38:55Z","cross_cats_sorted":[],"title_canon_sha256":"ff6ba49b68bf62638730aa8ca731eb85469647c4e8f24d5bb9f2e98324950121","abstract_canon_sha256":"57f2364ab14784ff853711fa7ec5d468227d527c3681a04768ec2f0d89022cbe"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:05:26.434730Z","signature_b64":"8D3ueO7B0IDdEFP5v5vaaJbeQY9bm5qenwnDGuDHcvkOG05PwuBitjfWNT2v+LKgJQDR183fVJFyx65ZS1q2Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"68aef6277cc160d1940f69cd61040a6f4f1bf215519a0902aa2705badf64d5a0","last_reissued_at":"2026-05-18T04:05:26.433944Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:05:26.433944Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The C++0x \"Concepts\" Effort","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.PL","authors_text":"Jeremy G. Siek","submitted_at":"2011-12-29T21:38:55Z","abstract_excerpt":"C++0x is the working title for the revision of the ISO standard of the C++ programming language that was originally planned for release in 2009 but that was delayed to 2011. The largest language extension in C++0x was \"concepts\", that is, a collection of features for constraining template parameters. In September of 2008, the C++ standards committee voted the concepts extension into C++0x, but then in July of 2009, the committee voted the concepts extension back out of C++0x.\n  This article is my account of the technical challenges and debates within the \"concepts\" effort in the years 2003 to "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1201.0027","kind":"arxiv","version":1},"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":"1201.0027","created_at":"2026-05-18T04:05:26.434043+00:00"},{"alias_kind":"arxiv_version","alias_value":"1201.0027v1","created_at":"2026-05-18T04:05:26.434043+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1201.0027","created_at":"2026-05-18T04:05:26.434043+00:00"},{"alias_kind":"pith_short_12","alias_value":"NCXPMJ34YFQN","created_at":"2026-05-18T12:26:37.096874+00:00"},{"alias_kind":"pith_short_16","alias_value":"NCXPMJ34YFQNDFAP","created_at":"2026-05-18T12:26:37.096874+00:00"},{"alias_kind":"pith_short_8","alias_value":"NCXPMJ34","created_at":"2026-05-18T12:26:37.096874+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/NCXPMJ34YFQNDFAPNHGWCBAKN5","json":"https://pith.science/pith/NCXPMJ34YFQNDFAPNHGWCBAKN5.json","graph_json":"https://pith.science/api/pith-number/NCXPMJ34YFQNDFAPNHGWCBAKN5/graph.json","events_json":"https://pith.science/api/pith-number/NCXPMJ34YFQNDFAPNHGWCBAKN5/events.json","paper":"https://pith.science/paper/NCXPMJ34"},"agent_actions":{"view_html":"https://pith.science/pith/NCXPMJ34YFQNDFAPNHGWCBAKN5","download_json":"https://pith.science/pith/NCXPMJ34YFQNDFAPNHGWCBAKN5.json","view_paper":"https://pith.science/paper/NCXPMJ34","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1201.0027&json=true","fetch_graph":"https://pith.science/api/pith-number/NCXPMJ34YFQNDFAPNHGWCBAKN5/graph.json","fetch_events":"https://pith.science/api/pith-number/NCXPMJ34YFQNDFAPNHGWCBAKN5/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/NCXPMJ34YFQNDFAPNHGWCBAKN5/action/timestamp_anchor","attest_storage":"https://pith.science/pith/NCXPMJ34YFQNDFAPNHGWCBAKN5/action/storage_attestation","attest_author":"https://pith.science/pith/NCXPMJ34YFQNDFAPNHGWCBAKN5/action/author_attestation","sign_citation":"https://pith.science/pith/NCXPMJ34YFQNDFAPNHGWCBAKN5/action/citation_signature","submit_replication":"https://pith.science/pith/NCXPMJ34YFQNDFAPNHGWCBAKN5/action/replication_record"}},"created_at":"2026-05-18T04:05:26.434043+00:00","updated_at":"2026-05-18T04:05:26.434043+00:00"}