{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:5SJC2HMLA2MRX5DK47QMEUF5EX","short_pith_number":"pith:5SJC2HML","canonical_record":{"source":{"id":"1212.4446","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"cs.FL","submitted_at":"2012-12-17T19:42:16Z","cross_cats_sorted":["cs.PL"],"title_canon_sha256":"65c0609a14ac1e2be4153e7b50e6ea74d7ca96f85cf4eb3e641942a67a0e57b6","abstract_canon_sha256":"7d385c8da3f1ce3c8820fbd4c3cc3af8b5580cc1cd274b4bd682ad8bfb3cbf95"},"schema_version":"1.0"},"canonical_sha256":"ec922d1d8b06991bf46ae7e0c250bd25c3717c9e851af5eb1c19133e453d77eb","source":{"kind":"arxiv","id":"1212.4446","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1212.4446","created_at":"2026-05-18T03:38:12Z"},{"alias_kind":"arxiv_version","alias_value":"1212.4446v1","created_at":"2026-05-18T03:38:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1212.4446","created_at":"2026-05-18T03:38:12Z"},{"alias_kind":"pith_short_12","alias_value":"5SJC2HMLA2MR","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_16","alias_value":"5SJC2HMLA2MRX5DK","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_8","alias_value":"5SJC2HML","created_at":"2026-05-18T12:26:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:5SJC2HMLA2MRX5DK47QMEUF5EX","target":"record","payload":{"canonical_record":{"source":{"id":"1212.4446","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"cs.FL","submitted_at":"2012-12-17T19:42:16Z","cross_cats_sorted":["cs.PL"],"title_canon_sha256":"65c0609a14ac1e2be4153e7b50e6ea74d7ca96f85cf4eb3e641942a67a0e57b6","abstract_canon_sha256":"7d385c8da3f1ce3c8820fbd4c3cc3af8b5580cc1cd274b4bd682ad8bfb3cbf95"},"schema_version":"1.0"},"canonical_sha256":"ec922d1d8b06991bf46ae7e0c250bd25c3717c9e851af5eb1c19133e453d77eb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:38:12.939781Z","signature_b64":"TPCUCOqu9TJEGv3KpFbZjSGrc7SM8Hz8tQGc1QNn2FZ4xZzGFgVDpCjDGsL3xea7f1WuJYBi64WXTOaygx6MAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ec922d1d8b06991bf46ae7e0c250bd25c3717c9e851af5eb1c19133e453d77eb","last_reissued_at":"2026-05-18T03:38:12.939035Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:38:12.939035Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1212.4446","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:38:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hNxMvG95MTXwINNv+oASJwNpGguKimTHSalUN8zBAV+L3OLpQsE1IA3dvC3cGWHWTmNA1Cdpwxf6BaqK6ZPHAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-25T14:11:27.111589Z"},"content_sha256":"b1c01dfb9c610cbc4f7df5a702620dbe33d5d685a1e0a68c41346c55da5fbc5f","schema_version":"1.0","event_id":"sha256:b1c01dfb9c610cbc4f7df5a702620dbe33d5d685a1e0a68c41346c55da5fbc5f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:5SJC2HMLA2MRX5DK47QMEUF5EX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Grammar Hammer of 2012","license":"http://creativecommons.org/licenses/by/3.0/","headline":"","cross_cats":["cs.PL"],"primary_cat":"cs.FL","authors_text":"Vadim Zaytsev","submitted_at":"2012-12-17T19:42:16Z","abstract_excerpt":"This document is a case study in aggressive self-archiving. It collects all initiatives undertaken by its author in 2012, including unpublished ones, explains their relevance and relation with one another. Discussed topics include guided convergence of formal grammars in a broad sense, programmable grammar transformation operator suites, metasyntactic specifications and methods of their manipulation, tolerant (soft computing) methods in parsing theory, megamodelling as modelling linguistic architecture of software systems, repositories of grammatical knowledge, open notebook computer science, "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1212.4446","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:38:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ixMzAlKWHg7HC9kD+aUDH4i1ieqgK9to5LFfZpfHIddBzsgYZWKn1eUDrfVLCAWw5Vk9z5ej56HUSf9tNJxgBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-25T14:11:27.111939Z"},"content_sha256":"205d3fffb1544a83a924e71c5029dedc55dc61bd49cfa4915b0a866dbad28ae0","schema_version":"1.0","event_id":"sha256:205d3fffb1544a83a924e71c5029dedc55dc61bd49cfa4915b0a866dbad28ae0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5SJC2HMLA2MRX5DK47QMEUF5EX/bundle.json","state_url":"https://pith.science/pith/5SJC2HMLA2MRX5DK47QMEUF5EX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5SJC2HMLA2MRX5DK47QMEUF5EX/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":"2026-06-25T14:11:27Z","links":{"resolver":"https://pith.science/pith/5SJC2HMLA2MRX5DK47QMEUF5EX","bundle":"https://pith.science/pith/5SJC2HMLA2MRX5DK47QMEUF5EX/bundle.json","state":"https://pith.science/pith/5SJC2HMLA2MRX5DK47QMEUF5EX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5SJC2HMLA2MRX5DK47QMEUF5EX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:5SJC2HMLA2MRX5DK47QMEUF5EX","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":"7d385c8da3f1ce3c8820fbd4c3cc3af8b5580cc1cd274b4bd682ad8bfb3cbf95","cross_cats_sorted":["cs.PL"],"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"cs.FL","submitted_at":"2012-12-17T19:42:16Z","title_canon_sha256":"65c0609a14ac1e2be4153e7b50e6ea74d7ca96f85cf4eb3e641942a67a0e57b6"},"schema_version":"1.0","source":{"id":"1212.4446","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1212.4446","created_at":"2026-05-18T03:38:12Z"},{"alias_kind":"arxiv_version","alias_value":"1212.4446v1","created_at":"2026-05-18T03:38:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1212.4446","created_at":"2026-05-18T03:38:12Z"},{"alias_kind":"pith_short_12","alias_value":"5SJC2HMLA2MR","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_16","alias_value":"5SJC2HMLA2MRX5DK","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_8","alias_value":"5SJC2HML","created_at":"2026-05-18T12:26:56Z"}],"graph_snapshots":[{"event_id":"sha256:205d3fffb1544a83a924e71c5029dedc55dc61bd49cfa4915b0a866dbad28ae0","target":"graph","created_at":"2026-05-18T03:38:12Z","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":"This document is a case study in aggressive self-archiving. It collects all initiatives undertaken by its author in 2012, including unpublished ones, explains their relevance and relation with one another. Discussed topics include guided convergence of formal grammars in a broad sense, programmable grammar transformation operator suites, metasyntactic specifications and methods of their manipulation, tolerant (soft computing) methods in parsing theory, megamodelling as modelling linguistic architecture of software systems, repositories of grammatical knowledge, open notebook computer science, ","authors_text":"Vadim Zaytsev","cross_cats":["cs.PL"],"headline":"","license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"cs.FL","submitted_at":"2012-12-17T19:42:16Z","title":"The Grammar Hammer of 2012"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1212.4446","kind":"arxiv","version":1},"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:b1c01dfb9c610cbc4f7df5a702620dbe33d5d685a1e0a68c41346c55da5fbc5f","target":"record","created_at":"2026-05-18T03:38:12Z","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":"7d385c8da3f1ce3c8820fbd4c3cc3af8b5580cc1cd274b4bd682ad8bfb3cbf95","cross_cats_sorted":["cs.PL"],"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"cs.FL","submitted_at":"2012-12-17T19:42:16Z","title_canon_sha256":"65c0609a14ac1e2be4153e7b50e6ea74d7ca96f85cf4eb3e641942a67a0e57b6"},"schema_version":"1.0","source":{"id":"1212.4446","kind":"arxiv","version":1}},"canonical_sha256":"ec922d1d8b06991bf46ae7e0c250bd25c3717c9e851af5eb1c19133e453d77eb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ec922d1d8b06991bf46ae7e0c250bd25c3717c9e851af5eb1c19133e453d77eb","first_computed_at":"2026-05-18T03:38:12.939035Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:38:12.939035Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TPCUCOqu9TJEGv3KpFbZjSGrc7SM8Hz8tQGc1QNn2FZ4xZzGFgVDpCjDGsL3xea7f1WuJYBi64WXTOaygx6MAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:38:12.939781Z","signed_message":"canonical_sha256_bytes"},"source_id":"1212.4446","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b1c01dfb9c610cbc4f7df5a702620dbe33d5d685a1e0a68c41346c55da5fbc5f","sha256:205d3fffb1544a83a924e71c5029dedc55dc61bd49cfa4915b0a866dbad28ae0"],"state_sha256":"5200aedabc33e25bd2510cd058c91d1b28abdc6611242564df73c37cb20d6fe8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"toUoIfpfTZGWIEqDJUUEa+t7o1caRwPDn+qFL6pqYlXPWRVf2oFGwR49tuQ1Bhbr28jZiO/ZAZ41n9+ObhvHCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-25T14:11:27.113936Z","bundle_sha256":"03404a3a9e1c68a8fbd3b517de8a4f7fa81176db2fafd77741508d6d5030ecb0"}}