{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:H65BIUUFL7DTVISS5O3MGXJXVH","short_pith_number":"pith:H65BIUUF","canonical_record":{"source":{"id":"2501.04303","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2025-01-08T06:27:07Z","cross_cats_sorted":[],"title_canon_sha256":"40778ae955ac3cb6fc04baa56b8da9dd06a886cb6b1019aebd14003036d4c3b3","abstract_canon_sha256":"40beb87e97c83ab11b1f9dcc8de6cdd05290402c3ee5e8c2495cf379e9839de3"},"schema_version":"1.0"},"canonical_sha256":"3fba1452855fc73aa252ebb6c35d37a9ca59f851fc09c82ae426077c338e5b18","source":{"kind":"arxiv","id":"2501.04303","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2501.04303","created_at":"2026-07-05T10:45:16Z"},{"alias_kind":"arxiv_version","alias_value":"2501.04303v2","created_at":"2026-07-05T10:45:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2501.04303","created_at":"2026-07-05T10:45:16Z"},{"alias_kind":"pith_short_12","alias_value":"H65BIUUFL7DT","created_at":"2026-07-05T10:45:16Z"},{"alias_kind":"pith_short_16","alias_value":"H65BIUUFL7DTVISS","created_at":"2026-07-05T10:45:16Z"},{"alias_kind":"pith_short_8","alias_value":"H65BIUUF","created_at":"2026-07-05T10:45:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:H65BIUUFL7DTVISS5O3MGXJXVH","target":"record","payload":{"canonical_record":{"source":{"id":"2501.04303","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2025-01-08T06:27:07Z","cross_cats_sorted":[],"title_canon_sha256":"40778ae955ac3cb6fc04baa56b8da9dd06a886cb6b1019aebd14003036d4c3b3","abstract_canon_sha256":"40beb87e97c83ab11b1f9dcc8de6cdd05290402c3ee5e8c2495cf379e9839de3"},"schema_version":"1.0"},"canonical_sha256":"3fba1452855fc73aa252ebb6c35d37a9ca59f851fc09c82ae426077c338e5b18","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:45:16.177591Z","signature_b64":"PLov7mm6BvOP8N0i5sWp54PIi+PJLuAh+HwAVtZeHcq7h5FqRlTQg88pUiEEMarRfSarO9xFuMx344v745uWDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3fba1452855fc73aa252ebb6c35d37a9ca59f851fc09c82ae426077c338e5b18","last_reissued_at":"2026-07-05T10:45:16.177072Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:45:16.177072Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2501.04303","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T10:45:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VwszyPe5QKvvxxIN3mgfHjcIVYvRuZqftVsMuW2FAyhycK2BiFphhOkGSetTNbo7GbiQpZSjv1djMpj+Sw2gDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T13:29:49.786360Z"},"content_sha256":"4efe921f7f70225818e7264f21f94cb12c6835ebf56d9d1209a4689c5e39960d","schema_version":"1.0","event_id":"sha256:4efe921f7f70225818e7264f21f94cb12c6835ebf56d9d1209a4689c5e39960d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:H65BIUUFL7DTVISS5O3MGXJXVH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Graph-Based Multimodal Contrastive Learning for Chart Question Answering","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CL","authors_text":"Soyeon Caren Han, Wei Liu, Yue Dai","submitted_at":"2025-01-08T06:27:07Z","abstract_excerpt":"Chart question answering (ChartQA) is challenged by the heterogeneous composition of chart elements and the subtle data patterns they encode. This work introduces a novel joint multimodal scene graph framework that explicitly models the relationships among chart components and their underlying structures. The framework integrates both visual and textual graphs to capture structural and semantic characteristics, while a graph contrastive learning strategy aligns node representations across modalities enabling their seamless incorporation into a transformer decoder as soft prompts. Moreover, a s"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2501.04303","kind":"arxiv","version":2},"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/2501.04303/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":"2026-07-05T10:45:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6+5vxMAum3X0+9XAXCbDfg0EStozAeXTQy/V7+D6G/4CUTNmuGTr3B1oashpPeDyjonpB5HN7kibUVRJWAomAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T13:29:49.786907Z"},"content_sha256":"0d518bf7b94fe4c03d5d9dd22df9122c47e578e00005eaa1a855617d50261120","schema_version":"1.0","event_id":"sha256:0d518bf7b94fe4c03d5d9dd22df9122c47e578e00005eaa1a855617d50261120"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/H65BIUUFL7DTVISS5O3MGXJXVH/bundle.json","state_url":"https://pith.science/pith/H65BIUUFL7DTVISS5O3MGXJXVH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/H65BIUUFL7DTVISS5O3MGXJXVH/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":"2026-08-21T13:29:49Z","links":{"resolver":"https://pith.science/pith/H65BIUUFL7DTVISS5O3MGXJXVH","bundle":"https://pith.science/pith/H65BIUUFL7DTVISS5O3MGXJXVH/bundle.json","state":"https://pith.science/pith/H65BIUUFL7DTVISS5O3MGXJXVH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/H65BIUUFL7DTVISS5O3MGXJXVH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:H65BIUUFL7DTVISS5O3MGXJXVH","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":"40beb87e97c83ab11b1f9dcc8de6cdd05290402c3ee5e8c2495cf379e9839de3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2025-01-08T06:27:07Z","title_canon_sha256":"40778ae955ac3cb6fc04baa56b8da9dd06a886cb6b1019aebd14003036d4c3b3"},"schema_version":"1.0","source":{"id":"2501.04303","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2501.04303","created_at":"2026-07-05T10:45:16Z"},{"alias_kind":"arxiv_version","alias_value":"2501.04303v2","created_at":"2026-07-05T10:45:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2501.04303","created_at":"2026-07-05T10:45:16Z"},{"alias_kind":"pith_short_12","alias_value":"H65BIUUFL7DT","created_at":"2026-07-05T10:45:16Z"},{"alias_kind":"pith_short_16","alias_value":"H65BIUUFL7DTVISS","created_at":"2026-07-05T10:45:16Z"},{"alias_kind":"pith_short_8","alias_value":"H65BIUUF","created_at":"2026-07-05T10:45:16Z"}],"graph_snapshots":[{"event_id":"sha256:0d518bf7b94fe4c03d5d9dd22df9122c47e578e00005eaa1a855617d50261120","target":"graph","created_at":"2026-07-05T10:45:16Z","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/2501.04303/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Chart question answering (ChartQA) is challenged by the heterogeneous composition of chart elements and the subtle data patterns they encode. This work introduces a novel joint multimodal scene graph framework that explicitly models the relationships among chart components and their underlying structures. The framework integrates both visual and textual graphs to capture structural and semantic characteristics, while a graph contrastive learning strategy aligns node representations across modalities enabling their seamless incorporation into a transformer decoder as soft prompts. Moreover, a s","authors_text":"Soyeon Caren Han, Wei Liu, Yue Dai","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2025-01-08T06:27:07Z","title":"Graph-Based Multimodal Contrastive Learning for Chart Question Answering"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2501.04303","kind":"arxiv","version":2},"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":"sha256:4efe921f7f70225818e7264f21f94cb12c6835ebf56d9d1209a4689c5e39960d","target":"record","created_at":"2026-07-05T10:45:16Z","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":"40beb87e97c83ab11b1f9dcc8de6cdd05290402c3ee5e8c2495cf379e9839de3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2025-01-08T06:27:07Z","title_canon_sha256":"40778ae955ac3cb6fc04baa56b8da9dd06a886cb6b1019aebd14003036d4c3b3"},"schema_version":"1.0","source":{"id":"2501.04303","kind":"arxiv","version":2}},"canonical_sha256":"3fba1452855fc73aa252ebb6c35d37a9ca59f851fc09c82ae426077c338e5b18","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3fba1452855fc73aa252ebb6c35d37a9ca59f851fc09c82ae426077c338e5b18","first_computed_at":"2026-07-05T10:45:16.177072Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:45:16.177072Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"PLov7mm6BvOP8N0i5sWp54PIi+PJLuAh+HwAVtZeHcq7h5FqRlTQg88pUiEEMarRfSarO9xFuMx344v745uWDg==","signature_status":"signed_v1","signed_at":"2026-07-05T10:45:16.177591Z","signed_message":"canonical_sha256_bytes"},"source_id":"2501.04303","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4efe921f7f70225818e7264f21f94cb12c6835ebf56d9d1209a4689c5e39960d","sha256:0d518bf7b94fe4c03d5d9dd22df9122c47e578e00005eaa1a855617d50261120"],"state_sha256":"58c51e3e9262cadda7f6ceabc3e8e493e61e57ffe2f0b6df6527e37e7c82752d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"z1hg0CiCM+KwaS6HDPaka3GCbotiQyOGUkmDrqtUEtuioEEnLfWlG384gwHiO+Ch0v4/7rIl0LiFmPbDlADfBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-21T13:29:49.791381Z","bundle_sha256":"628bc58714bfd709dfa5b5046c9d826460cd39080bf4f379ae5d4665d192794e"}}