{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:X63PRE5ELFWAXMNDTQ7EWJGIMH","short_pith_number":"pith:X63PRE5E","canonical_record":{"source":{"id":"1401.7821","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2014-01-30T12:29:46Z","cross_cats_sorted":[],"title_canon_sha256":"4e6bd5a221d74cac58e3bb2d9e8b58675ff9026c05cfac99fd86e84ec61fe36d","abstract_canon_sha256":"f68b4ecdc756339109188646f8d575eb6c4e24827ca00fbab5bb900c5a317ff7"},"schema_version":"1.0"},"canonical_sha256":"bfb6f893a4596c0bb1a39c3e4b24c861d9877e37508e02ff646d01b8519b9642","source":{"kind":"arxiv","id":"1401.7821","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1401.7821","created_at":"2026-05-18T03:00:38Z"},{"alias_kind":"arxiv_version","alias_value":"1401.7821v1","created_at":"2026-05-18T03:00:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1401.7821","created_at":"2026-05-18T03:00:38Z"},{"alias_kind":"pith_short_12","alias_value":"X63PRE5ELFWA","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_16","alias_value":"X63PRE5ELFWAXMND","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_8","alias_value":"X63PRE5E","created_at":"2026-05-18T12:28:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:X63PRE5ELFWAXMNDTQ7EWJGIMH","target":"record","payload":{"canonical_record":{"source":{"id":"1401.7821","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2014-01-30T12:29:46Z","cross_cats_sorted":[],"title_canon_sha256":"4e6bd5a221d74cac58e3bb2d9e8b58675ff9026c05cfac99fd86e84ec61fe36d","abstract_canon_sha256":"f68b4ecdc756339109188646f8d575eb6c4e24827ca00fbab5bb900c5a317ff7"},"schema_version":"1.0"},"canonical_sha256":"bfb6f893a4596c0bb1a39c3e4b24c861d9877e37508e02ff646d01b8519b9642","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:00:38.287589Z","signature_b64":"Th0rENNZBs9RU0x07vF1FLxkOgqjCAXvoq3I7YhGfDXnietl8pYLlh8LBmff3K9A2wW5AE2dvOHV9CiOrDD4Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bfb6f893a4596c0bb1a39c3e4b24c861d9877e37508e02ff646d01b8519b9642","last_reissued_at":"2026-05-18T03:00:38.286961Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:00:38.286961Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1401.7821","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":"2026-05-18T03:00:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3bmb2DihIUYbkmNIEj4tLPnnhZjO0D6ijeh6DLyz3DocqhijP4T5kRBDUCZr04qSutYcz+aLgd8cwwLUlT10DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T22:50:30.820271Z"},"content_sha256":"a9e103996f95bc9db25cc8fa891bdb0fcaf0f6327c1924af1a8c163113189b13","schema_version":"1.0","event_id":"sha256:a9e103996f95bc9db25cc8fa891bdb0fcaf0f6327c1924af1a8c163113189b13"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:X63PRE5ELFWAXMNDTQ7EWJGIMH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spatial Modelling Techniques in Microsoft Excel","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.HC","authors_text":"Stephen Allen","submitted_at":"2014-01-30T12:29:46Z","abstract_excerpt":"We begin by considering the expectations of the creators of VisiCalc, the first spreadsheet. The emphasis is on the nature of the spreadsheet grid. The grid is taken as a presentational method for showing a solution to a Sudoku puzzle. We consider methods or approaches for the solution. We look at the relationship between this model and academic papers on the methods for describing and categorising end-user models generally. We consider whether the type of model described here should be categorised separately. The complexity of the model is reviewed in the context of commendations to minimise "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1401.7821","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":"2026-05-18T03:00:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hqOmi6rf2ubIRJh+nNnUfT5FhdlOtiuTA6kW8FhsupqYyXSKOmry86G1Ppas1elCpaNFslFSyutzvyM6BiDICQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T22:50:30.820870Z"},"content_sha256":"93210e6be9b62d6d8422cccc0ece121d544dc6b205b4e2b2bb2812fb276f40cc","schema_version":"1.0","event_id":"sha256:93210e6be9b62d6d8422cccc0ece121d544dc6b205b4e2b2bb2812fb276f40cc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/X63PRE5ELFWAXMNDTQ7EWJGIMH/bundle.json","state_url":"https://pith.science/pith/X63PRE5ELFWAXMNDTQ7EWJGIMH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/X63PRE5ELFWAXMNDTQ7EWJGIMH/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":"2026-05-26T22:50:30Z","links":{"resolver":"https://pith.science/pith/X63PRE5ELFWAXMNDTQ7EWJGIMH","bundle":"https://pith.science/pith/X63PRE5ELFWAXMNDTQ7EWJGIMH/bundle.json","state":"https://pith.science/pith/X63PRE5ELFWAXMNDTQ7EWJGIMH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/X63PRE5ELFWAXMNDTQ7EWJGIMH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:X63PRE5ELFWAXMNDTQ7EWJGIMH","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":"f68b4ecdc756339109188646f8d575eb6c4e24827ca00fbab5bb900c5a317ff7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2014-01-30T12:29:46Z","title_canon_sha256":"4e6bd5a221d74cac58e3bb2d9e8b58675ff9026c05cfac99fd86e84ec61fe36d"},"schema_version":"1.0","source":{"id":"1401.7821","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1401.7821","created_at":"2026-05-18T03:00:38Z"},{"alias_kind":"arxiv_version","alias_value":"1401.7821v1","created_at":"2026-05-18T03:00:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1401.7821","created_at":"2026-05-18T03:00:38Z"},{"alias_kind":"pith_short_12","alias_value":"X63PRE5ELFWA","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_16","alias_value":"X63PRE5ELFWAXMND","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_8","alias_value":"X63PRE5E","created_at":"2026-05-18T12:28:57Z"}],"graph_snapshots":[{"event_id":"sha256:93210e6be9b62d6d8422cccc0ece121d544dc6b205b4e2b2bb2812fb276f40cc","target":"graph","created_at":"2026-05-18T03:00:38Z","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 begin by considering the expectations of the creators of VisiCalc, the first spreadsheet. The emphasis is on the nature of the spreadsheet grid. The grid is taken as a presentational method for showing a solution to a Sudoku puzzle. We consider methods or approaches for the solution. We look at the relationship between this model and academic papers on the methods for describing and categorising end-user models generally. We consider whether the type of model described here should be categorised separately. The complexity of the model is reviewed in the context of commendations to minimise ","authors_text":"Stephen Allen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2014-01-30T12:29:46Z","title":"Spatial Modelling Techniques in Microsoft Excel"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1401.7821","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:a9e103996f95bc9db25cc8fa891bdb0fcaf0f6327c1924af1a8c163113189b13","target":"record","created_at":"2026-05-18T03:00:38Z","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":"f68b4ecdc756339109188646f8d575eb6c4e24827ca00fbab5bb900c5a317ff7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2014-01-30T12:29:46Z","title_canon_sha256":"4e6bd5a221d74cac58e3bb2d9e8b58675ff9026c05cfac99fd86e84ec61fe36d"},"schema_version":"1.0","source":{"id":"1401.7821","kind":"arxiv","version":1}},"canonical_sha256":"bfb6f893a4596c0bb1a39c3e4b24c861d9877e37508e02ff646d01b8519b9642","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bfb6f893a4596c0bb1a39c3e4b24c861d9877e37508e02ff646d01b8519b9642","first_computed_at":"2026-05-18T03:00:38.286961Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:00:38.286961Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Th0rENNZBs9RU0x07vF1FLxkOgqjCAXvoq3I7YhGfDXnietl8pYLlh8LBmff3K9A2wW5AE2dvOHV9CiOrDD4Cg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:00:38.287589Z","signed_message":"canonical_sha256_bytes"},"source_id":"1401.7821","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a9e103996f95bc9db25cc8fa891bdb0fcaf0f6327c1924af1a8c163113189b13","sha256:93210e6be9b62d6d8422cccc0ece121d544dc6b205b4e2b2bb2812fb276f40cc"],"state_sha256":"64fad86be8d6ee8a9073cfd3456dee5fbc02d3563527caf6bc43ef53bd28c5ae"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WqITGYf63ivZhIUchLJBOXhIhCJ/pCZWWgk4NPJeoTWhBILCpjphX+eoOhoe/W9jVF/ogWKWFZ9+uii8/w1TBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T22:50:30.824212Z","bundle_sha256":"10c66909cd9f22d8a677a70dd09f5a78d5ef391e763858edb0312a31e61fb09d"}}