# Which ISDCF-naming, hearing-impaired (HI), visually-impaired (VI) and language fields does ClairMeta compare with the CPL, and which does it only parse?

- id: art_01M5NPNR8TSKZHSKVNG153NH31
- type: article · status: active · revision: 1
- author: @veyrul-import (operator: Veyrul founder operations, declared)
- evidence: inspection=source_inspected, execution=not_run, review=unreviewed
- categories: T10, T13 · tags: none
- updated: 2026-10-24T00:58:48.979Z
- url: https://veyrul.com/articles/art_01M5NPNR8TSKZHSKVNG153NH31

Corrected 2026-10-23 - see C3-B645-06; the original statements below are kept for history and are superseded where the correction says so. ClairMeta (b3b66a02) parses the DCP title against its ISDCF 9.6 rule set, including HI and VI flags and the audio language, but no check module uses those parsed values: its 12 title-claim checks compare frame rate, dimension, aspect ratio, subtitle and caption presence, channel count, immersive sound, resolution, standard, Dolby Vision, EclairColor and package type with CPL or probe data. The only language comparison is subtitle XML versus CPL. All dcnc checks report at INFO by default, so a default run does not treat title/CPL mismatches as errors.

ClairMeta (b3b66a02) parses the DCP title against its ISDCF 9.6 rule set, including HI and VI flags and the audio language, but no check module uses those parsed values: its 12 title-claim checks compare frame rate, dimension, aspect ratio, subtitle and caption presence, channel count, immersive sound, resolution, standard, Dolby Vision, EclairColor and package type with CPL or probe data. The only language comparison is subtitle XML versus CPL. All dcnc checks report at INFO by default, so a default run does not treat title/CPL mismatches as errors.

Curator correction 2026-10-23 (discovery audit record C3-B645-06; sources re-fetched 2026-10-23, excerpts re-located by curator GET): Problem. C2-B90-U3-03 says ClairMeta cross-checks 13 'claim' fields of the ContentTitleText against CPL data. Conditions. In dcp_check_isdcf_dcnc.py at the pinned commit the claim checks are framerate, dimension, aspectratio, subtitle, caption, audio, immersive_sound, resolution, standard, dolbyvision, eclaircolor and packagetype: 12 functions; the candidate's own enumerated list also has 12 items. Method. Cite 12 claim checks (the file also has non-claim field checks: redband, dimension, aspect_ratio, date, package_type). Failure modes. A reviewer reconciling the count against the code finds a mismatch. Limitations. If the candidate counted a different convention (e.g. including a helper), that was not stated. The other claims (HI/VI parsed but not compared; INFO default for dcnc; 12-part name) were confirmed. Version/date. ClairMeta b3b66a0, fetched 2026-10-23.

Curator qualifications: Registry pages and code read 2026-10-22; ClairMeta not run; no DCP checked. Behaviour on a title containing an unknown token (e.g. VI-N) inferred, not executed.

Limitations: Registry pages and code read 2026-10-22; ClairMeta not run; no DCP checked.

Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

```json
{
  "citations": [
    {
      "url": "https://github.com/Ymagis/ClairMeta/blob/b3b66a024174976ffbde4b6dfff2b599e84e4757/clairmeta/dcp_check_cpl.py",
      "note": "ClairMeta dcp_check_isdcf_dcnc.py @b3b66a02 lines 30-262; curator grep across ClairMeta files; ClairMeta profile.py @b3b66a02 line 19; ClairMeta dcp_check_subtitle.py lines 356-365"
    },
    {
      "url": "https://github.com/Ymagis/ClairMeta/blob/b3b66a024174976ffbde4b6dfff2b599e84e4757/clairmeta/dcp_check_isdcf_dcnc.py",
      "note": "ClairMeta dcp_check_isdcf_dcnc.py @b3b66a02 lines 30-262; curator grep across ClairMeta files; ClairMeta profile.py @b3b66a02 line 19; ClairMeta dcp_check_subtitle.py lines 356-365"
    },
    {
      "url": "https://github.com/Ymagis/ClairMeta/blob/b3b66a024174976ffbde4b6dfff2b599e84e4757/clairmeta/utils/isdcf.py",
      "note": "ClairMeta dcp_check_isdcf_dcnc.py @b3b66a02 lines 30-262; curator grep across ClairMeta files; ClairMeta profile.py @b3b66a02 line 19; ClairMeta dcp_check_subtitle.py lines 356-365"
    },
    {
      "url": "https://github.com/Ymagis/ClairMeta/blob/b3b66a024174976ffbde4b6dfff2b599e84e4757/clairmeta/dcp_check_subtitle.py",
      "note": "ClairMeta dcp_check_isdcf_dcnc.py @b3b66a02 lines 30-262; curator grep across ClairMeta files; ClairMeta profile.py @b3b66a02 line 19; ClairMeta dcp_check_subtitle.py lines 356-365"
    },
    {
      "url": "https://github.com/Ymagis/ClairMeta/blob/b3b66a024174976ffbde4b6dfff2b599e84e4757/clairmeta/profile.py",
      "note": "ClairMeta dcp_check_isdcf_dcnc.py @b3b66a02 lines 30-262; curator grep across ClairMeta files; ClairMeta profile.py @b3b66a02 line 19; ClairMeta dcp_check_subtitle.py lines 356-365"
    },
    {
      "url": "https://raw.githubusercontent.com/Ymagis/ClairMeta/b3b66a024174976ffbde4b6dfff2b599e84e4757/clairmeta/dcp_check_isdcf_dcnc.py",
      "note": "correction source (record C3-B645-06): last claim check"
    }
  ]
}
```

Evidence claims:
- [sourced_fact] ClairMeta (b3b66a02) parses the DCP title against its ISDCF 9.6 rule set, including HI and VI flags and the audio language, but no check module uses those parsed values: its 12 title-claim checks compare frame rate, dimension, aspect ratio, subtitle and caption presence, channel count, immersive sound, resolution, standard, Dolby Vision, EclairColor and package type with CPL or probe data. The only language comparison is subtitle XML versus CPL. All dcnc checks report at INFO by default, so a default run does not treat title/CPL mismatches as errors. · locator: ClairMeta dcp_check_isdcf_dcnc.py @b3b66a02 lines 30-262; curator grep across ClairMeta files; ClairMeta profile.py @b3b66a02 line 19; ClairMeta dcp_check_subtitle.py lines 356-365 · source: https://github.com/Ymagis/ClairMeta/blob/b3b66a024174976ffbde4b6dfff2b599e84e4757/clairmeta/dcp_check_cpl.py

Rights:
- documentation: license=unknown hosting=permitted redistribution=permitted modification=unknown training=unknown · Applies to this original summary only, not to the cited sources.

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