{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:DB23CDOKUXJE2A44YDGQ4XJMOO","short_pith_number":"pith:DB23CDOK","canonical_record":{"source":{"id":"2606.23997","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2026-06-22T23:07:38Z","cross_cats_sorted":[],"title_canon_sha256":"bbe9aab2f0d898feae5bed88c0efd71a58da2d4330664111ea86c25dc4db6bc0","abstract_canon_sha256":"df6803f537955ea07cc15794c98fb4effb4ac3ee58c2e4cde13e479f8282ab42"},"schema_version":"1.0"},"canonical_sha256":"1875b10dcaa5d24d039cc0cd0e5d2c739e02df30a22f8dbe402298c98bcc7479","source":{"kind":"arxiv","id":"2606.23997","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.23997","created_at":"2026-06-24T00:14:32Z"},{"alias_kind":"arxiv_version","alias_value":"2606.23997v1","created_at":"2026-06-24T00:14:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.23997","created_at":"2026-06-24T00:14:32Z"},{"alias_kind":"pith_short_12","alias_value":"DB23CDOKUXJE","created_at":"2026-06-24T00:14:32Z"},{"alias_kind":"pith_short_16","alias_value":"DB23CDOKUXJE2A44","created_at":"2026-06-24T00:14:32Z"},{"alias_kind":"pith_short_8","alias_value":"DB23CDOK","created_at":"2026-06-24T00:14:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:DB23CDOKUXJE2A44YDGQ4XJMOO","target":"record","payload":{"canonical_record":{"source":{"id":"2606.23997","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2026-06-22T23:07:38Z","cross_cats_sorted":[],"title_canon_sha256":"bbe9aab2f0d898feae5bed88c0efd71a58da2d4330664111ea86c25dc4db6bc0","abstract_canon_sha256":"df6803f537955ea07cc15794c98fb4effb4ac3ee58c2e4cde13e479f8282ab42"},"schema_version":"1.0"},"canonical_sha256":"1875b10dcaa5d24d039cc0cd0e5d2c739e02df30a22f8dbe402298c98bcc7479","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-24T00:14:32.627732Z","signature_b64":"GLZSgkFpB1d4UEM0/LDm1hAbANYY0PsPPVvow8VxT7xpqvTpQAAbGXB/avduRDpJrIEp2/Fz5Ue6oZ519Ve/AQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1875b10dcaa5d24d039cc0cd0e5d2c739e02df30a22f8dbe402298c98bcc7479","last_reissued_at":"2026-06-24T00:14:32.627313Z","signature_status":"signed_v1","first_computed_at":"2026-06-24T00:14:32.627313Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.23997","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":"2026-06-24T00:14:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"l7x/PempPyQGRhCre4o3XiDi3i42nOJaeiDjpDk5ZV4IUh7iVnunolZcxLfl2Oj9lSDtR6l1hXWX83/i7Aa9AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T18:12:26.687386Z"},"content_sha256":"b92bfbe5b96fc0a2e9577f2e5335db44f79102ae7dcf4dfba6036c6d6aa9f097","schema_version":"1.0","event_id":"sha256:b92bfbe5b96fc0a2e9577f2e5335db44f79102ae7dcf4dfba6036c6d6aa9f097"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:DB23CDOKUXJE2A44YDGQ4XJMOO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"ChartWalker: Benchmarking the Cross-Chart RAG Task","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.IR","authors_text":"Chenghan Xie, Hanyang Yuan, Hua Zhou, Jiarong Xu, Ning Tang, Qian Kou, Renhong Huang, Xiaofeng Shi, Yi Li","submitted_at":"2026-06-22T23:07:38Z","abstract_excerpt":"Cross-Chart Retrieval-Augmented Generation (RAG) is critical for complex multi-modal analytical tasks in scientific, business, and political domains. However, existing benchmarks either focus on tables, which are well-structured and textualized, or generate cross-chart questions by simply extracting key points, which often induces lexical overlap between queries and evidence and yields logically inconsistent reasoning chains. To address this, we introduce ChartWalker, a novel framework for constructing challenging cross-chart RAG tasks. ChartWalker features a hierarchical knowledge graph const"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.23997","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2606.23997/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-06-24T00:14:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oVdpVDmxhqyiWypTKAXyRZfUJ0AgfujrD6VmQRFqz0xd3REbPPnCxK0e1kytDRgdiycj/UUPkVVtb7PQUlgGAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T18:12:26.687792Z"},"content_sha256":"d1401f19cc58ec9d6bcc2999ace9ecc1ed42756423fd0fd922e508202ba12b08","schema_version":"1.0","event_id":"sha256:d1401f19cc58ec9d6bcc2999ace9ecc1ed42756423fd0fd922e508202ba12b08"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DB23CDOKUXJE2A44YDGQ4XJMOO/bundle.json","state_url":"https://pith.science/pith/DB23CDOKUXJE2A44YDGQ4XJMOO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DB23CDOKUXJE2A44YDGQ4XJMOO/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":"2026-06-27T18:12:26Z","links":{"resolver":"https://pith.science/pith/DB23CDOKUXJE2A44YDGQ4XJMOO","bundle":"https://pith.science/pith/DB23CDOKUXJE2A44YDGQ4XJMOO/bundle.json","state":"https://pith.science/pith/DB23CDOKUXJE2A44YDGQ4XJMOO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DB23CDOKUXJE2A44YDGQ4XJMOO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:DB23CDOKUXJE2A44YDGQ4XJMOO","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":"df6803f537955ea07cc15794c98fb4effb4ac3ee58c2e4cde13e479f8282ab42","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2026-06-22T23:07:38Z","title_canon_sha256":"bbe9aab2f0d898feae5bed88c0efd71a58da2d4330664111ea86c25dc4db6bc0"},"schema_version":"1.0","source":{"id":"2606.23997","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.23997","created_at":"2026-06-24T00:14:32Z"},{"alias_kind":"arxiv_version","alias_value":"2606.23997v1","created_at":"2026-06-24T00:14:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.23997","created_at":"2026-06-24T00:14:32Z"},{"alias_kind":"pith_short_12","alias_value":"DB23CDOKUXJE","created_at":"2026-06-24T00:14:32Z"},{"alias_kind":"pith_short_16","alias_value":"DB23CDOKUXJE2A44","created_at":"2026-06-24T00:14:32Z"},{"alias_kind":"pith_short_8","alias_value":"DB23CDOK","created_at":"2026-06-24T00:14:32Z"}],"graph_snapshots":[{"event_id":"sha256:d1401f19cc58ec9d6bcc2999ace9ecc1ed42756423fd0fd922e508202ba12b08","target":"graph","created_at":"2026-06-24T00:14:32Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2606.23997/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Cross-Chart Retrieval-Augmented Generation (RAG) is critical for complex multi-modal analytical tasks in scientific, business, and political domains. However, existing benchmarks either focus on tables, which are well-structured and textualized, or generate cross-chart questions by simply extracting key points, which often induces lexical overlap between queries and evidence and yields logically inconsistent reasoning chains. To address this, we introduce ChartWalker, a novel framework for constructing challenging cross-chart RAG tasks. ChartWalker features a hierarchical knowledge graph const","authors_text":"Chenghan Xie, Hanyang Yuan, Hua Zhou, Jiarong Xu, Ning Tang, Qian Kou, Renhong Huang, Xiaofeng Shi, Yi Li","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2026-06-22T23:07:38Z","title":"ChartWalker: Benchmarking the Cross-Chart RAG Task"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.23997","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:b92bfbe5b96fc0a2e9577f2e5335db44f79102ae7dcf4dfba6036c6d6aa9f097","target":"record","created_at":"2026-06-24T00:14:32Z","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":"df6803f537955ea07cc15794c98fb4effb4ac3ee58c2e4cde13e479f8282ab42","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2026-06-22T23:07:38Z","title_canon_sha256":"bbe9aab2f0d898feae5bed88c0efd71a58da2d4330664111ea86c25dc4db6bc0"},"schema_version":"1.0","source":{"id":"2606.23997","kind":"arxiv","version":1}},"canonical_sha256":"1875b10dcaa5d24d039cc0cd0e5d2c739e02df30a22f8dbe402298c98bcc7479","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1875b10dcaa5d24d039cc0cd0e5d2c739e02df30a22f8dbe402298c98bcc7479","first_computed_at":"2026-06-24T00:14:32.627313Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-24T00:14:32.627313Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GLZSgkFpB1d4UEM0/LDm1hAbANYY0PsPPVvow8VxT7xpqvTpQAAbGXB/avduRDpJrIEp2/Fz5Ue6oZ519Ve/AQ==","signature_status":"signed_v1","signed_at":"2026-06-24T00:14:32.627732Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.23997","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b92bfbe5b96fc0a2e9577f2e5335db44f79102ae7dcf4dfba6036c6d6aa9f097","sha256:d1401f19cc58ec9d6bcc2999ace9ecc1ed42756423fd0fd922e508202ba12b08"],"state_sha256":"f42301d55b3f166c64182f1aeb7d22da87f42d5f34922faf3a2602b644ed1ee0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8V07PfJQ8k1bi3QSa3MtmzbOryhu1WM3nrYENx21GynYDCKkQKfGBMULSoMXpFSCGMlP7UPiEAbgj5Dz6z8cBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-27T18:12:26.689909Z","bundle_sha256":"0576c04fd5ae55c563f3b40c702b3cd1aba9753902e5dd4e443ed934d6fa3a12"}}