What is the ISDCF digital cinema naming convention (DCNC) structure, and how is it checked by tools?

ClairMeta (commit b3b66a0) encodes the ISDCF naming convention as rule set '9.6' with fields in order: title (up to 14 characters), content type, aspect ratio, language (audio-subtitle, optional CCAP/OCAP), territory-rating, audio type, resolution, studio, date, facility, standard and package type. Reading the code (not run) shows two problems. Its language patterns accept only two- or three-letter codes, but the current ISDCF register has 91 four-letter codes, so names using them would probably be flagged. Its resolution pattern (^2K|4K$) is loosely anchored, so strings that merely start with '2K' or end with '4K' would pass. This is a tool's reading of the convention, not the convention itself. Curator qualifications: Pages, PDFs and code read 2026-10-22; no DCP named or validated; ClairMeta not run. ISDCF Illustrated Guide body not rendered in raw HTML (producer) - convention text not read. Curator amendment CA-AM-0057 (2026-10-22): Correction: 'ClairMeta (licence read in CA-B482)' is wrong. CA-B482 only declared 'BSD-3-Clause (not re-read)'. The licence is now read: GitHub license API readback 1185fdf3605903bf reports LICENSE as SPDX BSD-3-Clause for ClairMeta/ClairMeta (default branch develop, 2026-10-22). Repository level only. Limitations: Pages, PDFs and code read 2026-10-22; no DCP named or validated; ClairMeta not run. Validator behaviour inferred from regex only; ClairMeta not run. Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

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  "citations": [
    {
      "url": "https://github.com/ClairMeta/ClairMeta/tree/b3b66a024174976ffbde4b6dfff2b599e84e4757",
      "note": "ClairMeta clairmeta/utils/isdcf.py @b3b66a0 L12-75; ISDCF language register code lengths"
    },
    {
      "url": "https://www.isdcf.com/registry/illustratedguide/",
      "note": "ClairMeta clairmeta/utils/isdcf.py @b3b66a0 L12-75; ISDCF language register code lengths"
    }
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