{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:DD73MMKFPST6Q52M2JGDSAPBSI","short_pith_number":"pith:DD73MMKF","canonical_record":{"source":{"id":"1509.07694","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.OS","submitted_at":"2015-09-25T12:37:09Z","cross_cats_sorted":[],"title_canon_sha256":"86ff117355303e75c3c4b35cac419afe0ca57a06204b953dd4d9ebf7cf63c845","abstract_canon_sha256":"12fa94d9a469355d9a215cfc9fd4aac5025b22b7769233c391b53f81aeed9b80"},"schema_version":"1.0"},"canonical_sha256":"18ffb631457ca7e8774cd24c3901e192335074502c55dab760d978ba4461f039","source":{"kind":"arxiv","id":"1509.07694","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.07694","created_at":"2026-05-18T01:32:02Z"},{"alias_kind":"arxiv_version","alias_value":"1509.07694v1","created_at":"2026-05-18T01:32:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.07694","created_at":"2026-05-18T01:32:02Z"},{"alias_kind":"pith_short_12","alias_value":"DD73MMKFPST6","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_16","alias_value":"DD73MMKFPST6Q52M","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_8","alias_value":"DD73MMKF","created_at":"2026-05-18T12:29:17Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:DD73MMKFPST6Q52M2JGDSAPBSI","target":"record","payload":{"canonical_record":{"source":{"id":"1509.07694","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.OS","submitted_at":"2015-09-25T12:37:09Z","cross_cats_sorted":[],"title_canon_sha256":"86ff117355303e75c3c4b35cac419afe0ca57a06204b953dd4d9ebf7cf63c845","abstract_canon_sha256":"12fa94d9a469355d9a215cfc9fd4aac5025b22b7769233c391b53f81aeed9b80"},"schema_version":"1.0"},"canonical_sha256":"18ffb631457ca7e8774cd24c3901e192335074502c55dab760d978ba4461f039","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:32:02.154014Z","signature_b64":"zSYowaYcGTkm2LrIEVXBUa2tt8Zm/jRGLXgOUIbiO282rcifN9BQ2QnSf4miK0It+P4ZCDeKIZaPTJ0GjQlZCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"18ffb631457ca7e8774cd24c3901e192335074502c55dab760d978ba4461f039","last_reissued_at":"2026-05-18T01:32:02.153600Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:32:02.153600Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1509.07694","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":"2026-05-18T01:32:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pWCXxU6tgR1pFCz/CJzRFyqPZv/K5mbv5NH11rBQbpI/Z/BBVwhxLv1ez5oNssHk013OtdvrB0sbpPJaUjqiCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-22T10:33:50.573476Z"},"content_sha256":"40d4ce84999b43f17030da4a47b77bca49f0605b904fccd803d16ed3b8b47ecc","schema_version":"1.0","event_id":"sha256:40d4ce84999b43f17030da4a47b77bca49f0605b904fccd803d16ed3b8b47ecc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:DD73MMKFPST6Q52M2JGDSAPBSI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Folding a Tree into a Map","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.OS","authors_text":"Victor Yodaiken","submitted_at":"2015-09-25T12:37:09Z","abstract_excerpt":"Analysis of the retrieval architecture of the highly influential UNIX file system (\\cite{Ritchie}\\cite{multicsfs}) provides insight into design methods, constraints, and possible alternatives. The basic architecture can be understood in terms of function composition and recursion by anyone with some mathematical maturity. Expertise in operating system coding or in any specialized \"formal method\" is not required."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.07694","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":"2026-05-18T01:32:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"28kFPg1uHtxdlPW8G9kTDNWpz8BHofGmjMF2WrBTNQoczIgALaLyTWFHxhUHn6DN1+yIlrLJy+wbtnSbkPQOCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-22T10:33:50.573828Z"},"content_sha256":"4983947ef5e9c89daa7cb81dcc1fb1365b5a05848501a57265be9e2e2650d4ae","schema_version":"1.0","event_id":"sha256:4983947ef5e9c89daa7cb81dcc1fb1365b5a05848501a57265be9e2e2650d4ae"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DD73MMKFPST6Q52M2JGDSAPBSI/bundle.json","state_url":"https://pith.science/pith/DD73MMKFPST6Q52M2JGDSAPBSI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DD73MMKFPST6Q52M2JGDSAPBSI/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":"2026-06-22T10:33:50Z","links":{"resolver":"https://pith.science/pith/DD73MMKFPST6Q52M2JGDSAPBSI","bundle":"https://pith.science/pith/DD73MMKFPST6Q52M2JGDSAPBSI/bundle.json","state":"https://pith.science/pith/DD73MMKFPST6Q52M2JGDSAPBSI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DD73MMKFPST6Q52M2JGDSAPBSI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:DD73MMKFPST6Q52M2JGDSAPBSI","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":"12fa94d9a469355d9a215cfc9fd4aac5025b22b7769233c391b53f81aeed9b80","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.OS","submitted_at":"2015-09-25T12:37:09Z","title_canon_sha256":"86ff117355303e75c3c4b35cac419afe0ca57a06204b953dd4d9ebf7cf63c845"},"schema_version":"1.0","source":{"id":"1509.07694","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.07694","created_at":"2026-05-18T01:32:02Z"},{"alias_kind":"arxiv_version","alias_value":"1509.07694v1","created_at":"2026-05-18T01:32:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.07694","created_at":"2026-05-18T01:32:02Z"},{"alias_kind":"pith_short_12","alias_value":"DD73MMKFPST6","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_16","alias_value":"DD73MMKFPST6Q52M","created_at":"2026-05-18T12:29:17Z"},{"alias_kind":"pith_short_8","alias_value":"DD73MMKF","created_at":"2026-05-18T12:29:17Z"}],"graph_snapshots":[{"event_id":"sha256:4983947ef5e9c89daa7cb81dcc1fb1365b5a05848501a57265be9e2e2650d4ae","target":"graph","created_at":"2026-05-18T01:32:02Z","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":"Analysis of the retrieval architecture of the highly influential UNIX file system (\\cite{Ritchie}\\cite{multicsfs}) provides insight into design methods, constraints, and possible alternatives. The basic architecture can be understood in terms of function composition and recursion by anyone with some mathematical maturity. Expertise in operating system coding or in any specialized \"formal method\" is not required.","authors_text":"Victor Yodaiken","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.OS","submitted_at":"2015-09-25T12:37:09Z","title":"Folding a Tree into a Map"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.07694","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":"sha256:40d4ce84999b43f17030da4a47b77bca49f0605b904fccd803d16ed3b8b47ecc","target":"record","created_at":"2026-05-18T01:32:02Z","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":"12fa94d9a469355d9a215cfc9fd4aac5025b22b7769233c391b53f81aeed9b80","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.OS","submitted_at":"2015-09-25T12:37:09Z","title_canon_sha256":"86ff117355303e75c3c4b35cac419afe0ca57a06204b953dd4d9ebf7cf63c845"},"schema_version":"1.0","source":{"id":"1509.07694","kind":"arxiv","version":1}},"canonical_sha256":"18ffb631457ca7e8774cd24c3901e192335074502c55dab760d978ba4461f039","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"18ffb631457ca7e8774cd24c3901e192335074502c55dab760d978ba4461f039","first_computed_at":"2026-05-18T01:32:02.153600Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:32:02.153600Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zSYowaYcGTkm2LrIEVXBUa2tt8Zm/jRGLXgOUIbiO282rcifN9BQ2QnSf4miK0It+P4ZCDeKIZaPTJ0GjQlZCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:32:02.154014Z","signed_message":"canonical_sha256_bytes"},"source_id":"1509.07694","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:40d4ce84999b43f17030da4a47b77bca49f0605b904fccd803d16ed3b8b47ecc","sha256:4983947ef5e9c89daa7cb81dcc1fb1365b5a05848501a57265be9e2e2650d4ae"],"state_sha256":"76fa57045bf62ccac6e86853094f6f5df27862315fd9637cfca78e57935f6ab4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HUPhyzjsisrOobS44WvJW7CSfqKmbQmZjD4q2LpLI732m+LhPgt0q2hwH0sMb8XgY+bCa2UnJdL9cHHlu61qAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-22T10:33:50.575704Z","bundle_sha256":"8106a3fc0cf6c2ba40d723934f4937c75e789115316fc4f1929746c916c4cc19"}}