180 lines
8 KiB
YAML
180 lines
8 KiB
YAML
id: https://nde.nl/ontology/hc/class/VideoTranscript
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name: video_transcript_class
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title: Video Transcript Class
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imports:
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- linkml:types
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- ./VideoTextContent
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- ./VideoTimeSegment
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- ../slots/full_text
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- ../slots/includes_speaker
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- ../slots/includes_timestamp
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- ../slots/paragraph_count
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- ../slots/primary_speaker
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- ../slots/has_or_had_segment
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- ../slots/sentence_count
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- ../slots/source_language_auto_detected
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- ../slots/speaker_count
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- ../slots/specificity_annotation
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- ../slots/template_specificity
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- ../slots/transcript_format
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- ./SpecificityAnnotation
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- ./TemplateSpecificityScores
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- ../enums/TranscriptFormatEnum
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prefixes:
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linkml: https://w3id.org/linkml/
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hc: https://nde.nl/ontology/hc/
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schema: http://schema.org/
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dcterms: http://purl.org/dc/terms/
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prov: http://www.w3.org/ns/prov#
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crm: http://www.cidoc-crm.org/cidoc-crm/
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skos: http://www.w3.org/2004/02/skos/core#
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default_prefix: hc
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classes:
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VideoTranscript:
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is_a: VideoTextContent
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class_uri: crm:E33_Linguistic_Object
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abstract: false
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description: "Full text transcription of video audio content.\n\n**DEFINITION**:\n\nA VideoTranscript is the complete\
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\ textual representation of all spoken\ncontent in a video. It extends VideoTextContent with transcript-specific\nproperties\
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\ and inherits all provenance tracking capabilities.\n\n**RELATIONSHIP TO VideoSubtitle**:\n\nVideoSubtitle is a subclass\
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\ of VideoTranscript because:\n1. A subtitle file contains everything a transcript needs PLUS time codes\n2. You can\
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\ derive a plain transcript from subtitles by stripping times\n3. This inheritance allows polymorphic handling of text\
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\ content\n\n```\nVideoTranscript VideoSubtitle (is_a VideoTranscript)\n├── full_text ├── full_text\
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\ (inherited)\n├── segments[] ├── segments[] (required, with times)\n└── (optional times) └── subtitle_format\
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\ (SRT, VTT, etc.)\n```\n\n**SCHEMA.ORG ALIGNMENT**:\n\nMaps to `schema:transcript` property:\n> \"If this MediaObject\
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\ is an AudioObject or VideoObject, \n> the transcript of that object.\"\n\n**CIDOC-CRM E33_Linguistic_Object**:\n\n\
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E33 is the class comprising:\n> \"identifiable expressions in natural language or code\"\n\nA transcript is a linguistic\
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\ object derived from the audio track of\na video (which is itself an E73_Information_Object).\n\n**TRANSCRIPT FORMATS**:\n\
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\n| Format | Description | Use Case |\n|--------|-------------|----------|\n| PLAIN_TEXT | Continuous text, no structure\
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\ | Simple search indexing |\n| PARAGRAPHED | Text broken into paragraphs | Human reading |\n| STRUCTURED | Segments\
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\ with speaker labels | Research, analysis |\n| TIMESTAMPED | Segments with time markers | Navigation, subtitling |\n\
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\n**GENERATION METHODS** (inherited from VideoTextContent):\n\n| Method | Typical Use | Quality |\n|--------|-------------|---------|\n\
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| ASR_AUTOMATIC | Whisper, Google STT | 0.80-0.95 |\n| MANUAL_TRANSCRIPTION | Human transcriber | 0.98-1.0 |\n| PLATFORM_PROVIDED\
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\ | YouTube auto-captions | 0.75-0.90 |\n| HYBRID | ASR + human correction | 0.95-1.0 |\n\n**HERITAGE INSTITUTION CONTEXT**:\n\
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\nTranscripts are critical for heritage video collections:\n\n1. **Discovery**: Full-text search over video content\n\
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2. **Accessibility**: Deaf/HoH access to spoken content\n3. **Preservation**: Text outlasts video format obsolescence\n\
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4. **Research**: Corpus analysis, keyword extraction\n5. **Translation**: Base for multilingual access\n6. **SEO**:\
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\ Search engine indexing of video content\n\n**STRUCTURED SEGMENTS**:\n\nWhen `segments` is populated, the transcript\
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\ has structural breakdown:\n\n```yaml\nsegments:\n - segment_index: 0\n start_seconds: 0.0\n end_seconds: 5.5\n\
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\ segment_text: \"Welcome to the Rijksmuseum.\"\n speaker_label: \"Narrator\"\n confidence: 0.94\n - segment_index:\
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\ 1\n start_seconds: 5.5\n end_seconds: 12.3\n segment_text: \"Today we'll explore the Night Watch gallery.\"\
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\n speaker_label: \"Narrator\"\n confidence: 0.91\n```\n\n**PROVENANCE** (inherited from VideoTextContent):\n\n\
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All transcripts include:\n- `source_video`: Which video was transcribed\n- `generated_by`: Tool/person that created\
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\ transcript\n- `generation_method`: ASR_AUTOMATIC, MANUAL_TRANSCRIPTION, etc.\n- `generation_timestamp`: When transcript\
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\ was created\n- `overall_confidence`: Aggregate quality score\n- `is_verified`: Whether human-reviewed\n"
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exact_mappings:
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- crm:E33_Linguistic_Object
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close_mappings:
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- schema:transcript
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related_mappings:
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- dcterms:Text
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slots:
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- full_text
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- includes_speaker
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- includes_timestamp
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- paragraph_count
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- primary_speaker
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- has_or_had_segment
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- sentence_count
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- source_language_auto_detected
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- speaker_count
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- specificity_annotation
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- template_specificity
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- transcript_format
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slot_usage:
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full_text:
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range: string
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required: true
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examples:
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- value: 'Welcome to the Rijksmuseum. Today we''ll explore the masterpieces
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of Dutch Golden Age painting. Our first stop is the Night Watch
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by Rembrandt van Rijn, painted in 1642.
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'
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description: Plain text transcript excerpt
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- value: '[Narrator] Welcome to the Rijksmuseum.
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[Narrator] Today we''ll explore the masterpieces of Dutch Golden Age painting.
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[Curator] Our first stop is the Night Watch by Rembrandt van Rijn.
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'
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description: Transcript with speaker labels
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transcript_format:
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range: TranscriptFormatEnum
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required: false
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ifabsent: string(PLAIN_TEXT)
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examples:
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- value: STRUCTURED
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description: Text with speaker labels and paragraph breaks
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includes_timestamp:
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range: boolean
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required: false
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ifabsent: 'false'
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examples:
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- value: true
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description: Transcript has time codes
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includes_speaker:
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range: boolean
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required: false
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ifabsent: 'false'
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examples:
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- value: true
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description: Multi-speaker transcript with diarization
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has_or_had_segment:
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range: VideoTimeSegment
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required: false
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multivalued: true
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inlined: true
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inlined_as_list: true
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examples:
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- value: "- segment_index: 0\n start_seconds: 0.0\n end_seconds: 3.5\n segment_text: \"Welcome to the museum.\"\
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\n confidence: 0.95\n"
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description: Single structured segment
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speaker_count:
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range: integer
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required: false
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minimum_value: 0
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examples:
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- value: 3
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description: Three speakers identified
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primary_speaker:
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range: string
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required: false
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examples:
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- value: Narrator
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description: Generic primary speaker
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- value: Dr. Taco Dibbits, Museum Director
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description: Named primary speaker
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source_language_auto_detected:
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range: boolean
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required: false
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ifabsent: 'false'
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examples:
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- value: true
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description: Language was auto-detected
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paragraph_count:
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range: integer
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required: false
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minimum_value: 0
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examples:
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- value: 15
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description: Transcript has 15 paragraphs
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sentence_count:
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range: integer
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required: false
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minimum_value: 0
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examples:
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- value: 47
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description: Transcript has ~47 sentences
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comments:
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- Full text transcription of video audio content
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- Extends VideoTextContent with transcript-specific properties
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- Base class for VideoSubtitle (subtitles are transcripts + time codes)
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- Supports both plain text and structured segment-based transcripts
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- Critical for accessibility, discovery, and preservation
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see_also:
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- https://schema.org/transcript
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- http://www.cidoc-crm.org/cidoc-crm/E33_Linguistic_Object
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