{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:EEHSB47O7YQJOZZUBKNPVN2HMZ","short_pith_number":"pith:EEHSB47O","canonical_record":{"source":{"id":"1604.00346","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2016-04-01T18:25:58Z","cross_cats_sorted":["cs.LO","cs.PL"],"title_canon_sha256":"10158cab5ddfbff1602b63e794ddfdf4d8f72a8442c82352121a35b312a14970","abstract_canon_sha256":"b107ae7f77983b949037c46ea95b3254054c1cd90e1ac75fdfef6bb3fa7035ca"},"schema_version":"1.0"},"canonical_sha256":"210f20f3eefe209767340a9afab7476670bc096f0eb8cc2d75c3e8c7695a19ab","source":{"kind":"arxiv","id":"1604.00346","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.00346","created_at":"2026-05-18T01:17:53Z"},{"alias_kind":"arxiv_version","alias_value":"1604.00346v1","created_at":"2026-05-18T01:17:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.00346","created_at":"2026-05-18T01:17:53Z"},{"alias_kind":"pith_short_12","alias_value":"EEHSB47O7YQJ","created_at":"2026-05-18T12:30:12Z"},{"alias_kind":"pith_short_16","alias_value":"EEHSB47O7YQJOZZU","created_at":"2026-05-18T12:30:12Z"},{"alias_kind":"pith_short_8","alias_value":"EEHSB47O","created_at":"2026-05-18T12:30:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:EEHSB47O7YQJOZZUBKNPVN2HMZ","target":"record","payload":{"canonical_record":{"source":{"id":"1604.00346","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2016-04-01T18:25:58Z","cross_cats_sorted":["cs.LO","cs.PL"],"title_canon_sha256":"10158cab5ddfbff1602b63e794ddfdf4d8f72a8442c82352121a35b312a14970","abstract_canon_sha256":"b107ae7f77983b949037c46ea95b3254054c1cd90e1ac75fdfef6bb3fa7035ca"},"schema_version":"1.0"},"canonical_sha256":"210f20f3eefe209767340a9afab7476670bc096f0eb8cc2d75c3e8c7695a19ab","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:17:53.944365Z","signature_b64":"LrVxgYOt24weDi87HPFRWlVZH65dMLF7yIPJiMMNtjOHDraESVvgDiImhKaoLJB4gsOifJL7fIn1ghgKD+RHCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"210f20f3eefe209767340a9afab7476670bc096f0eb8cc2d75c3e8c7695a19ab","last_reissued_at":"2026-05-18T01:17:53.943742Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:17:53.943742Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1604.00346","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":"2026-05-18T01:17:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LBmEsKm1uLmRHHGiCxxd9Gp574jH0RNj3WixX8bto7e+eY6dgrQAYCDxQ7gai6T3G/z1HUUrRfCLpkz5L1nvDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T16:02:49.661646Z"},"content_sha256":"cf6615cd3ae54908f90c7c031129ba02a67c932339402ea233b760556902665e","schema_version":"1.0","event_id":"sha256:cf6615cd3ae54908f90c7c031129ba02a67c932339402ea233b760556902665e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:EEHSB47O7YQJOZZUBKNPVN2HMZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Refactoring Delta-Oriented Product Lines to achieve Monotonicity","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.LO","cs.PL"],"primary_cat":"cs.SE","authors_text":"Ferruccio Damiani (University of Torino, Italy), Michael Lienhardt (University of Torino","submitted_at":"2016-04-01T18:25:58Z","abstract_excerpt":"Delta-oriented programming (DOP) is a flexible transformational approach to implement software product lines. In delta-oriented product lines, variants are generated by applying operations contained in delta modules to a (possibly empty) base program. These operations can add, remove or modify named elements in a program (e.g., classes, methods and fields in a Java program). This paper presents algorithms for refactoring a delta-oriented product line into monotonic form, i.e., either to contain add and modify operations only (monotonic increasing) or to contain remove and modify operations onl"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.00346","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":"2026-05-18T01:17:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KavXkf0epX83A9ueQL4U4R/BNj32U1o4Frp5tPmwbxiaHq8I43oRSyWi9kavVevEWxAH2U+iPvRxOk4T6aC1AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T16:02:49.662005Z"},"content_sha256":"a88bac461d483a8365ed974004159c9785b9505ecbbbb2fcafb41802076ad8e1","schema_version":"1.0","event_id":"sha256:a88bac461d483a8365ed974004159c9785b9505ecbbbb2fcafb41802076ad8e1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EEHSB47O7YQJOZZUBKNPVN2HMZ/bundle.json","state_url":"https://pith.science/pith/EEHSB47O7YQJOZZUBKNPVN2HMZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EEHSB47O7YQJOZZUBKNPVN2HMZ/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":"2026-06-05T16:02:49Z","links":{"resolver":"https://pith.science/pith/EEHSB47O7YQJOZZUBKNPVN2HMZ","bundle":"https://pith.science/pith/EEHSB47O7YQJOZZUBKNPVN2HMZ/bundle.json","state":"https://pith.science/pith/EEHSB47O7YQJOZZUBKNPVN2HMZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EEHSB47O7YQJOZZUBKNPVN2HMZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:EEHSB47O7YQJOZZUBKNPVN2HMZ","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":"b107ae7f77983b949037c46ea95b3254054c1cd90e1ac75fdfef6bb3fa7035ca","cross_cats_sorted":["cs.LO","cs.PL"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2016-04-01T18:25:58Z","title_canon_sha256":"10158cab5ddfbff1602b63e794ddfdf4d8f72a8442c82352121a35b312a14970"},"schema_version":"1.0","source":{"id":"1604.00346","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.00346","created_at":"2026-05-18T01:17:53Z"},{"alias_kind":"arxiv_version","alias_value":"1604.00346v1","created_at":"2026-05-18T01:17:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.00346","created_at":"2026-05-18T01:17:53Z"},{"alias_kind":"pith_short_12","alias_value":"EEHSB47O7YQJ","created_at":"2026-05-18T12:30:12Z"},{"alias_kind":"pith_short_16","alias_value":"EEHSB47O7YQJOZZU","created_at":"2026-05-18T12:30:12Z"},{"alias_kind":"pith_short_8","alias_value":"EEHSB47O","created_at":"2026-05-18T12:30:12Z"}],"graph_snapshots":[{"event_id":"sha256:a88bac461d483a8365ed974004159c9785b9505ecbbbb2fcafb41802076ad8e1","target":"graph","created_at":"2026-05-18T01:17:53Z","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":"Delta-oriented programming (DOP) is a flexible transformational approach to implement software product lines. In delta-oriented product lines, variants are generated by applying operations contained in delta modules to a (possibly empty) base program. These operations can add, remove or modify named elements in a program (e.g., classes, methods and fields in a Java program). This paper presents algorithms for refactoring a delta-oriented product line into monotonic form, i.e., either to contain add and modify operations only (monotonic increasing) or to contain remove and modify operations onl","authors_text":"Ferruccio Damiani (University of Torino, Italy), Michael Lienhardt (University of Torino","cross_cats":["cs.LO","cs.PL"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2016-04-01T18:25:58Z","title":"Refactoring Delta-Oriented Product Lines to achieve Monotonicity"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.00346","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:cf6615cd3ae54908f90c7c031129ba02a67c932339402ea233b760556902665e","target":"record","created_at":"2026-05-18T01:17:53Z","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":"b107ae7f77983b949037c46ea95b3254054c1cd90e1ac75fdfef6bb3fa7035ca","cross_cats_sorted":["cs.LO","cs.PL"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2016-04-01T18:25:58Z","title_canon_sha256":"10158cab5ddfbff1602b63e794ddfdf4d8f72a8442c82352121a35b312a14970"},"schema_version":"1.0","source":{"id":"1604.00346","kind":"arxiv","version":1}},"canonical_sha256":"210f20f3eefe209767340a9afab7476670bc096f0eb8cc2d75c3e8c7695a19ab","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"210f20f3eefe209767340a9afab7476670bc096f0eb8cc2d75c3e8c7695a19ab","first_computed_at":"2026-05-18T01:17:53.943742Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:17:53.943742Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LrVxgYOt24weDi87HPFRWlVZH65dMLF7yIPJiMMNtjOHDraESVvgDiImhKaoLJB4gsOifJL7fIn1ghgKD+RHCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:17:53.944365Z","signed_message":"canonical_sha256_bytes"},"source_id":"1604.00346","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cf6615cd3ae54908f90c7c031129ba02a67c932339402ea233b760556902665e","sha256:a88bac461d483a8365ed974004159c9785b9505ecbbbb2fcafb41802076ad8e1"],"state_sha256":"9d9cfd9e3813dd33bbccec4a01f9b0a2a69629bd6f5c0a744caaab79c4b2c396"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WXJxKkEK5HIjpS4/IqMX7o04umpI+u07tf88D5Yi/ecyKhy+zvSVCcpgB0dKtUiGbLhARlFXSfMRziydsrgRAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T16:02:49.666152Z","bundle_sha256":"f76d7f588f6a866263760d10d13ad878e08049c7ba7cfa8f19c982ea70a05943"}}