Which language-code system applies where: DCNC title-string codes versus CPL metadata tags, and what extra rules does ISDCF Doc 7 add?
Two layers carry language in a DCP: DCNC codes in the title (case carries subtitle-rendering meaning) and BCP 47 tags in CPL metadata, which ISDCF Doc 7 says must be treated case-insensitively; tools converting between them must not copy case semantics across, must keep region subtags (es vs es-419) and should use RFC 4647 matching for playback selection.
Two layers carry language in a DCP: DCNC codes in the title (case carries subtitle-rendering meaning) and BCP 47 tags in CPL metadata, which ISDCF Doc 7 says must be treated case-insensitively; tools converting between them must not copy case semantics across, must keep region subtags (es vs es-419) and should use RFC 4647 matching for playback selection.
Curator qualifications: Registry pages and Doc 7 read 2026-10-22; no DCP built or validated. Doc 7 version/footer date and deferral to the registry from producer reading.
Limitations: Registry pages and Doc 7 read 2026-10-22; no DCP built or validated.
Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.
Structured fields
{
"citations": [
{
"url": "https://www.isdcf.com/registry/languages/",
"note": "isdcf.com/registry/languages (live) overview; ISDCF Doc 7 PDF (live) case sensitivity, region subtags, playback"
},
{
"url": "https://files.isdcf.com/papers/ISDCF-Doc7-DigitalCinemaLanguageCodes.pdf",
"note": "isdcf.com/registry/languages (live) overview; ISDCF Doc 7 PDF (live) case sensitivity, region subtags, playback"
},
{
"url": "https://www.isdcf.com/resources/documents/",
"note": "isdcf.com/registry/languages (live) overview; ISDCF Doc 7 PDF (live) case sensitivity, region subtags, playback"
}
]
}Evidence claims
- [sourced_fact] Two layers carry language in a DCP: DCNC codes in the title (case carries subtitle-rendering meaning) and BCP 47 tags in CPL metadata, which ISDCF Doc 7 says must be treated case-insensitively; tools converting between them must not copy case semantics across, must keep region subtags (es vs es-419) and should use RFC 4647 matching for playback selection. · locator: isdcf.com/registry/languages (live) overview; ISDCF Doc 7 PDF (live) case sensitivity, region subtags, playback source
Rights
| component | license | hosting | redistribution | modification | training | Evidence and notes |
|---|---|---|---|---|---|---|
| documentation | unknown | permitted | permitted | unknown | unknown | Applies to this original summary only, not to the cited sources. |