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auto-ingest: ietf-elements backfill — 208 new elements (2026-07-12)
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‎corpus/elements/rfc-9559__design-rationale-chaptertranslate-and-tracktranslate-elements-map-matroska-segmentuuids-and.yaml‎

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document: rfc-9559
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kind: design-rationale
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summary: ChapterTranslate and TrackTranslate elements map Matroska SegmentUUIDs and track IDs to the internal identifiers used by Chapter Codecs (e.g., DVD/Blu-ray menu systems), enabling remuxing without modifying the chapter codec payload.
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section: 5.1.2.8
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extracted_by: claude-sonnet-4-6
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extracted_at: "2026-07-12"

‎corpus/elements/rfc-9559__design-rationale-referenceblock-uses-relative-timestamps-rather-than-a-simple.yaml‎

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document: rfc-9559
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kind: design-rationale
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summary: ReferenceBlock uses relative timestamps rather than a simple P-frame/B-frame flag because this allows arbitrary inter-frame reference graphs; multiple ReferenceBlock elements in one BlockGroup express dependencies on any previously decoded frames.
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section: 5.1.3.5.5
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extracted_by: claude-sonnet-4-6
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extracted_at: "2026-07-12"

‎corpus/elements/rfc-9559__design-rationale-rfc-8794-erroneously-reserved-ebml-id-0x80-which.yaml‎

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document: rfc-9559
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kind: design-rationale
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summary: RFC 8794 erroneously reserved EBML ID 0x80, which was already in use by deployed Matroska implementations. RFC 9559 updates RFC 8794 to un-reserve 0x80, expanding valid one-octet EBML Element IDs from 0x81–0xFE to 0x80–0xFE (127 values instead of 126).
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section: "4.2"
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topics:
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- registry
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extracted_by: claude-sonnet-4-6
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extracted_at: "2026-07-12"

‎corpus/elements/rfc-9559__interoperability-note-oldstereomode-ebml-id-0x53b9-maxver-2-was-an.yaml‎

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document: rfc-9559
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kind: interoperability-note
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summary: OldStereoMode (EBML ID 0x53B9, maxver=2) was an incorrect stereo-mode field written by libmatroska up to version 0.9.0 and MUST NOT be used in new files. Readers may encounter it in legacy content.
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section: 5.1.4.1.28.5
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extracted_by: claude-sonnet-4-6
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extracted_at: "2026-07-12"

‎corpus/elements/rfc-9559__interoperability-note-the-legacy-language-element-uses-a-3-character.yaml‎

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document: rfc-9559
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kind: interoperability-note
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summary: The legacy Language element uses a 3-character ISO 639-2 bibliographic code and MUST be ignored when the LanguageBCP47 element (RFC 5646 tag) is present in the same TrackEntry. Implementations should prefer LanguageBCP47 (minver=4) for new content.
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section: 5.1.4.1.19
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extracted_by: claude-sonnet-4-6
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extracted_at: "2026-07-12"

‎corpus/elements/rfc-9559__normative-requirement-a-matroska-file-must-be-composed-of-at.yaml‎

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document: rfc-9559
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kind: normative-requirement
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summary: A Matroska file MUST be composed of at least one EBML Document using the Matroska Document Type. Each EBML Document MUST start with an EBML Header and MUST be followed by the Segment Root Element.
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section: "4.5"
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rfc2119_level: MUST
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extracted_by: claude-sonnet-4-6
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extracted_at: "2026-07-12"

‎corpus/elements/rfc-9559__normative-requirement-every-cluster-element-must-contain-exactly-one-timestamp.yaml‎

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document: rfc-9559
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kind: normative-requirement
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summary: Every Cluster element MUST contain exactly one Timestamp element, and that Timestamp MUST be stored once per Cluster. The Timestamp SHOULD be the first child of the Cluster it belongs to, or the second if that Cluster begins with a CRC-32 element.
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section: 5.1.3.1
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rfc2119_level: MUST
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extracted_by: claude-sonnet-4-6
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extracted_at: "2026-07-12"

‎corpus/elements/rfc-9559__normative-requirement-in-a-hard-linked-segment-either-prevuuid-or.yaml‎

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document: rfc-9559
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kind: normative-requirement
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summary: In a Hard-Linked Segment, either PrevUUID or NextUUID MUST be present in Info. PrevUUID and NextUUID MUST NOT equal the Segment's own SegmentUUID. The SegmentFamily element MUST be shared by all Segments of a Linked Segment.
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section: 5.1.2.3
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rfc2119_level: MUST
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extracted_by: claude-sonnet-4-6
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extracted_at: "2026-07-12"

‎corpus/elements/rfc-9559__normative-requirement-matroska-writers-must-not-use-ebml-empty-elements.yaml‎

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document: rfc-9559
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kind: normative-requirement
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summary: Matroska Writers MUST NOT use EBML Empty Elements if the element has a default value that is not 0 for integers/dates or 0x0p+0 for floats, because legacy parsers assumed 0 regardless of the declared default.
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section: "4.4"
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rfc2119_level: MUST NOT
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extracted_by: claude-sonnet-4-6
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extracted_at: "2026-07-12"

‎corpus/elements/rfc-9559__normative-requirement-seekpreroll-ebml-id-0x56bb-specifies-the-duration-in.yaml‎

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document: rfc-9559
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kind: normative-requirement
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summary: SeekPreRoll (EBML ID 0x56BB) specifies the duration in nanoseconds of data a decoder MUST decode after a discontinuity before its output is valid. This timestamp MUST be accounted for by the player during seeking for codecs requiring priming (e.g., Opus).
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section: 5.1.4.1.26
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rfc2119_level: MUST
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extracted_by: claude-sonnet-4-6
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extracted_at: "2026-07-12"

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