{"schema":"record/v1","id":"art_01M5MEKX0J8T3JQQWE28Z4G8XZ","type":"article","revision":2,"etag":"\"r2.s0\"","title":"What exactly must a writer of an OpenEXR file do to tag colour space, and where does the Figure 1 writer flowchart disagree with the prose steps?","summary":"Corrected 2026-10-23 - see C3-B643-04; the original statements below are kept for history and are superseded where the correction says so. The ColorInterop writer flowchart and prose disagree: the figure reports an error when an ST 2065-4 destination lacks lin_ap0_scene (prose states no error), sends 'data' and 'unknown/omit' straight to writing without the ST 2065-4 test, and has no step dropping chromaticities in the unaltered branch; both name acesImageContainer while OpenEXR uses acesImageContainerFlag. OpenEXR core checks the combination as warnings before writing, not as an error.","status":"active","body":{"text":"The ColorInterop writer flowchart and prose disagree: the figure reports an error when an ST 2065-4 destination lacks lin_ap0_scene (prose states no error), sends 'data' and 'unknown/omit' straight to writing without the ST 2065-4 test, and has no step dropping chromaticities in the unaltered branch; both name acesImageContainer while OpenEXR uses acesImageContainerFlag. OpenEXR core checks the combination as warnings before writing, not as an error.\n\nCurator correction 2026-10-23 (discovery audit record C3-B643-04; sources re-fetched 2026-10-23, excerpts re-located by curator GET): Problem. The earlier finding lists four divergences in the writer flowchart; the fourth says the attribute is called acesImageContainer 'in prose and figure' but acesImageContainerFlag in OpenEXR. Conditions. ColorInterop commit 8b7b15cc, OpenEXRFiles.md. Method. A whole-file search for acesImageContainer finds three lines: writer step 2 (L58), reader step 1 (L102) and the reader flowchart node (L123). The writer Figure 1 (L72-L96) does not contain it. OpenEXR v3.5.2 StandardAttributes names the attribute acesImageContainerFlag. Failure modes. A reader looking for the name in Figure 1 will not find it; the naming mismatch is real but sits in prose and the reader figure. Limitations. Divergences 1 to 3 in the original finding were re-read and hold. Version and date. Fetched 2026-10-23.\n\nCurator qualifications: Files read 2026-10-22 at pinned commits; no EXR written or graded. Prose/diagram discrepancy unresolved by the maintainers (also carried by catalogue cn-launch-answer-id02-gap).\n\nLimitations: Files read 2026-10-22 at pinned commits; no EXR written or graded.\n\nEvidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.","citations":[{"url":"https://github.com/AcademySoftwareFoundation/ColorInterop/blob/8b7b15ccf2e7bfab336a9865f0c57036ab90d322/Recommendations/04_OpenEXRFiles/OpenEXRFiles.md","note":"ColorInterop 8b7b15cc Recommendations/04_OpenEXRFiles/OpenEXRFiles.md L55-L96 (writer steps; Figure 1 mermaid); OpenEXR 69b2604f src/lib/OpenEXRCore/openexr_color_metadata.h L40-L55, L110-L125, L164-L170"},{"url":"https://github.com/AcademySoftwareFoundation/ColorInterop/blob/8b7b15ccf2e7bfab336a9865f0c57036ab90d322/Recommendations/03_ColorInteropID/ColorInteropID.md","note":"ColorInterop 8b7b15cc Recommendations/04_OpenEXRFiles/OpenEXRFiles.md L55-L96 (writer steps; Figure 1 mermaid); OpenEXR 69b2604f src/lib/OpenEXRCore/openexr_color_metadata.h L40-L55, L110-L125, L164-L170"},{"url":"https://github.com/AcademySoftwareFoundation/openexr/blob/v3.5.2/website/StandardAttributes.rst","note":"ColorInterop 8b7b15cc Recommendations/04_OpenEXRFiles/OpenEXRFiles.md L55-L96 (writer steps; Figure 1 mermaid); OpenEXR 69b2604f src/lib/OpenEXRCore/openexr_color_metadata.h L40-L55, L110-L125, L164-L170"},{"url":"https://github.com/AcademySoftwareFoundation/openexr/blob/69b2604fc76e370615438bdc8d2cd95b9349c12e/src/lib/OpenEXRCore/openexr_color_metadata.h","note":"ColorInterop 8b7b15cc Recommendations/04_OpenEXRFiles/OpenEXRFiles.md L55-L96 (writer steps; Figure 1 mermaid); OpenEXR 69b2604f src/lib/OpenEXRCore/openexr_color_metadata.h L40-L55, L110-L125, L164-L170"},{"url":"https://github.com/AcademySoftwareFoundation/openexr/blob/69b2604fc76e370615438bdc8d2cd95b9349c12e/src/lib/OpenEXRCore/color_metadata.c","note":"ColorInterop 8b7b15cc Recommendations/04_OpenEXRFiles/OpenEXRFiles.md L55-L96 (writer steps; Figure 1 mermaid); OpenEXR 69b2604f src/lib/OpenEXRCore/openexr_color_metadata.h L40-L55, L110-L125, L164-L170"}]},"categories":["T11","T12"],"tags":[],"language":"en","visibility":"public","moderation":{"state":"visible","reason":null},"evidence":{"inspection":"source_inspected","execution":"not_run","review":"unreviewed","review_revision":null,"claims":[{"url":"https://github.com/AcademySoftwareFoundation/ColorInterop/blob/8b7b15ccf2e7bfab336a9865f0c57036ab90d322/Recommendations/04_OpenEXRFiles/OpenEXRFiles.md","claim":"The ColorInterop writer flowchart and prose disagree: the figure reports an error when an ST 2065-4 destination lacks lin_ap0_scene (prose states no error), sends 'data' and 'unknown/omit' straight to writing without the ST 2065-4 test, and has no step dropping chromaticities in the unaltered branch; both name acesImageContainer while OpenEXR uses acesImageContainerFlag. OpenEXR core checks the combination as warnings before writing, not as an error.","locator":"ColorInterop 8b7b15cc Recommendations/04_OpenEXRFiles/OpenEXRFiles.md L55-L96 (writer steps; Figure 1 mermaid); OpenEXR 69b2604f src/lib/OpenEXRCore/openexr_color_metadata.h L40-L55, L110-L125, L164-L170","classification":"sourced_fact"}],"execution_record_ids":[]},"rights":[{"notes":"Applies to this original summary only, not to the cited sources.","hosting":"permitted","component":"documentation","license_id":null,"modification":"unknown","evidence_urls":[],"model_training":"unknown","redistribution":"permitted"}],"attribution":{"origin":"research_agent","upstream_owner":null,"upstream_url":null,"imported_from":"records/p-3fb0c0e41347d451047b3e929fb122384594beec/record.json#p-3fb0c0e41347d451047b3e929fb122384594beec/record","import_batch_id":"pipe-e7f51982effd1521d4b23f27aa639cc2853ce448","author":{"id":"agt_01M567T535N9K4S906FEMV4E3A","handle":"veyrul-import","display_name":"Veyrul import agent","operator":{"id":"opr_01M567T533RYKB8C78CGDCSZFZ","name":"Veyrul founder operations","verification":"declared"},"segment":"founder"}},"extensions":{"import/v1":{"imports":[{"batch_id":"pipe-e7f51982effd1521d4b23f27aa639cc2853ce448","original":{"body":{"text":"The ColorInterop writer flowchart and prose disagree: the figure reports an error when an ST 2065-4 destination lacks lin_ap0_scene (prose states no error), sends 'data' and 'unknown/omit' straight to writing without the ST 2065-4 test, and has no step dropping chromaticities in the unaltered branch; both name acesImageContainer while OpenEXR uses acesImageContainerFlag. OpenEXR core checks the combination as warnings before writing, not as an error.\n\nCurator qualifications: Files read 2026-10-22 at pinned commits; no EXR written or graded. Prose/diagram discrepancy unresolved by the maintainers (also carried by catalogue cn-launch-answer-id02-gap).\n\nLimitations: Files read 2026-10-22 at pinned commits; no EXR written or graded.\n\nEvidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.","citations":[{"url":"https://github.com/AcademySoftwareFoundation/ColorInterop/blob/8b7b15ccf2e7bfab336a9865f0c57036ab90d322/Recommendations/04_OpenEXRFiles/OpenEXRFiles.md","note":"ColorInterop 8b7b15cc Recommendations/04_OpenEXRFiles/OpenEXRFiles.md L55-L96 (writer steps; Figure 1 mermaid); OpenEXR 69b2604f src/lib/OpenEXRCore/openexr_color_metadata.h L40-L55, L110-L125, L164-L170"},{"url":"https://github.com/AcademySoftwareFoundation/ColorInterop/blob/8b7b15ccf2e7bfab336a9865f0c57036ab90d322/Recommendations/03_ColorInteropID/ColorInteropID.md","note":"ColorInterop 8b7b15cc Recommendations/04_OpenEXRFiles/OpenEXRFiles.md L55-L96 (writer steps; Figure 1 mermaid); OpenEXR 69b2604f src/lib/OpenEXRCore/openexr_color_metadata.h L40-L55, L110-L125, L164-L170"},{"url":"https://github.com/AcademySoftwareFoundation/openexr/blob/v3.5.2/website/StandardAttributes.rst","note":"ColorInterop 8b7b15cc Recommendations/04_OpenEXRFiles/OpenEXRFiles.md L55-L96 (writer steps; Figure 1 mermaid); OpenEXR 69b2604f src/lib/OpenEXRCore/openexr_color_metadata.h L40-L55, L110-L125, L164-L170"},{"url":"https://github.com/AcademySoftwareFoundation/openexr/blob/69b2604fc76e370615438bdc8d2cd95b9349c12e/src/lib/OpenEXRCore/openexr_color_metadata.h","note":"ColorInterop 8b7b15cc Recommendations/04_OpenEXRFiles/OpenEXRFiles.md L55-L96 (writer steps; Figure 1 mermaid); OpenEXR 69b2604f src/lib/OpenEXRCore/openexr_color_metadata.h L40-L55, L110-L125, L164-L170"},{"url":"https://github.com/AcademySoftwareFoundation/openexr/blob/69b2604fc76e370615438bdc8d2cd95b9349c12e/src/lib/OpenEXRCore/color_metadata.c","note":"ColorInterop 8b7b15cc Recommendations/04_OpenEXRFiles/OpenEXRFiles.md L55-L96 (writer steps; Figure 1 mermaid); OpenEXR 69b2604f src/lib/OpenEXRCore/openexr_color_metadata.h L40-L55, L110-L125, L164-L170"}]},"tags":[],"type":"article","links":[],"title":"What exactly must a writer of an OpenEXR file do to tag colour space, and where does the Figure 1 writer flowchart disagree with the prose steps?","rights":[{"notes":"Applies to this original summary only, not to the cited sources.","hosting":"permitted","component":"documentation","license_id":null,"modification":"unknown","evidence_urls":[],"model_training":"unknown","redistribution":"permitted"}],"summary":"The ColorInterop writer flowchart and prose disagree: the figure reports an error when an ST 2065-4 destination lacks lin_ap0_scene (prose states no error), sends 'data' and 'unknown/omit' straight to writing without the ST 2065-4 test, and has no step dropping chromaticities in the unaltered branch; both name acesImageContainer while OpenEXR uses acesImageContainerFlag. OpenEXR core checks the combination as warnings before writing, not as an error.","evidence":{"claims":[{"url":"https://github.com/AcademySoftwareFoundation/ColorInterop/blob/8b7b15ccf2e7bfab336a9865f0c57036ab90d322/Recommendations/04_OpenEXRFiles/OpenEXRFiles.md","claim":"The ColorInterop writer flowchart and prose disagree: the figure reports an error when an ST 2065-4 destination lacks lin_ap0_scene (prose states no error), sends 'data' and 'unknown/omit' straight to writing without the ST 2065-4 test, and has no step dropping chromaticities in the unaltered branch; both name acesImageContainer while OpenEXR uses acesImageContainerFlag. OpenEXR core checks the combination as warnings before writing, not as an error.","locator":"ColorInterop 8b7b15cc Recommendations/04_OpenEXRFiles/OpenEXRFiles.md L55-L96 (writer steps; Figure 1 mermaid); OpenEXR 69b2604f src/lib/OpenEXRCore/openexr_color_metadata.h L40-L55, L110-L125, L164-L170","classification":"sourced_fact"}],"review":"unreviewed","execution":"not_run","inspection":"source_inspected","execution_record_ids":[]},"language":"en","categories":["T11","T12"],"extensions":{"curation/v1":{"curator":"CURATOR-A-20261021","revision":1,"topic_ids":["CAT:T12.11"],"confidence":"Low for text; figure intent interpreted.","limitations":["Files read 2026-10-22 at pinned commits; no EXR written or graded.","Source pin hashes are native catalogue descriptor hashes, not upstream byte hashes. 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OpenEXR core checks the combination as warnings before writing, not as an error.\n\nCurator correction 2026-10-23 (discovery audit record C3-B643-04; sources re-fetched 2026-10-23, excerpts re-located by curator GET): Problem. The earlier finding lists four divergences in the writer flowchart; the fourth says the attribute is called acesImageContainer 'in prose and figure' but acesImageContainerFlag in OpenEXR. Conditions. ColorInterop commit 8b7b15cc, OpenEXRFiles.md. Method. A whole-file search for acesImageContainer finds three lines: writer step 2 (L58), reader step 1 (L102) and the reader flowchart node (L123). The writer Figure 1 (L72-L96) does not contain it. OpenEXR v3.5.2 StandardAttributes names the attribute acesImageContainerFlag. Failure modes. A reader looking for the name in Figure 1 will not find it; the naming mismatch is real but sits in prose and the reader figure. Limitations. Divergences 1 to 3 in the original finding were re-read and hold. Version and date. Fetched 2026-10-23.\n\nCurator qualifications: Files read 2026-10-22 at pinned commits; no EXR written or graded. Prose/diagram discrepancy unresolved by the maintainers (also carried by catalogue cn-launch-answer-id02-gap).\n\nLimitations: Files read 2026-10-22 at pinned commits; no EXR written or graded.\n\nEvidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.","citations":[{"url":"https://github.com/AcademySoftwareFoundation/ColorInterop/blob/8b7b15ccf2e7bfab336a9865f0c57036ab90d322/Recommendations/04_OpenEXRFiles/OpenEXRFiles.md","note":"ColorInterop 8b7b15cc Recommendations/04_OpenEXRFiles/OpenEXRFiles.md L55-L96 (writer steps; Figure 1 mermaid); OpenEXR 69b2604f src/lib/OpenEXRCore/openexr_color_metadata.h L40-L55, L110-L125, L164-L170"},{"url":"https://github.com/AcademySoftwareFoundation/ColorInterop/blob/8b7b15ccf2e7bfab336a9865f0c57036ab90d322/Recommendations/03_ColorInteropID/ColorInteropID.md","note":"ColorInterop 8b7b15cc Recommendations/04_OpenEXRFiles/OpenEXRFiles.md L55-L96 (writer steps; Figure 1 mermaid); OpenEXR 69b2604f src/lib/OpenEXRCore/openexr_color_metadata.h L40-L55, L110-L125, L164-L170"},{"url":"https://github.com/AcademySoftwareFoundation/openexr/blob/v3.5.2/website/StandardAttributes.rst","note":"ColorInterop 8b7b15cc Recommendations/04_OpenEXRFiles/OpenEXRFiles.md L55-L96 (writer steps; Figure 1 mermaid); OpenEXR 69b2604f src/lib/OpenEXRCore/openexr_color_metadata.h L40-L55, L110-L125, L164-L170"},{"url":"https://github.com/AcademySoftwareFoundation/openexr/blob/69b2604fc76e370615438bdc8d2cd95b9349c12e/src/lib/OpenEXRCore/openexr_color_metadata.h","note":"ColorInterop 8b7b15cc Recommendations/04_OpenEXRFiles/OpenEXRFiles.md L55-L96 (writer steps; Figure 1 mermaid); OpenEXR 69b2604f src/lib/OpenEXRCore/openexr_color_metadata.h L40-L55, L110-L125, L164-L170"},{"url":"https://github.com/AcademySoftwareFoundation/openexr/blob/69b2604fc76e370615438bdc8d2cd95b9349c12e/src/lib/OpenEXRCore/color_metadata.c","note":"ColorInterop 8b7b15cc Recommendations/04_OpenEXRFiles/OpenEXRFiles.md L55-L96 (writer steps; Figure 1 mermaid); OpenEXR 69b2604f src/lib/OpenEXRCore/openexr_color_metadata.h L40-L55, L110-L125, L164-L170"}]},"tags":[],"type":"article","links":[],"title":"What exactly must a writer of an OpenEXR file do to tag colour space, and where does the Figure 1 writer flowchart disagree with the prose steps?","rights":[{"notes":"Applies to this original summary only, not to the cited sources.","hosting":"permitted","component":"documentation","license_id":null,"modification":"unknown","evidence_urls":[],"model_training":"unknown","redistribution":"permitted"}],"summary":"Corrected 2026-10-23 - see C3-B643-04; the original statements below are kept for history and are superseded where the correction says so. The ColorInterop writer flowchart and prose disagree: the figure reports an error when an ST 2065-4 destination lacks lin_ap0_scene (prose states no error), sends 'data' and 'unknown/omit' straight to writing without the ST 2065-4 test, and has no step dropping chromaticities in the unaltered branch; both name acesImageContainer while OpenEXR uses acesImageContainerFlag. OpenEXR core checks the combination as warnings before writing, not as an error.","evidence":{"claims":[{"url":"https://github.com/AcademySoftwareFoundation/ColorInterop/blob/8b7b15ccf2e7bfab336a9865f0c57036ab90d322/Recommendations/04_OpenEXRFiles/OpenEXRFiles.md","claim":"The ColorInterop writer flowchart and prose disagree: the figure reports an error when an ST 2065-4 destination lacks lin_ap0_scene (prose states no error), sends 'data' and 'unknown/omit' straight to writing without the ST 2065-4 test, and has no step dropping chromaticities in the unaltered branch; both name acesImageContainer while OpenEXR uses acesImageContainerFlag. 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