STJ 0.5

[yaniv-golan]

Added

• Comprehensive character encoding requirements:

  • Mandatory UTF-8 encoding with optional BOM
  • String content validation rules
  • Unicode normalization requirements
  • Character encoding validation requirements

• Detailed Speaker ID Requirements:

  • Format specifications for speaker_id
  • Allowed characters, length constraints
  • Uniqueness and case sensitivity rules
  • Guidelines for representing anonymous speakers

• Comprehensive time format requirements and constraints:

  • Specific implementation requirements for handling time values
  • Time value precision and range requirements
  • Consolidated time-related validation requirements

Changed

• Renamed additional_info fields to extensions throughout the specification
• Introduced namespaces within the extensions field for structured custom data
• Reserved specific namespaces (stj, webvtt, ttml, ssa, srt, dfxp, smptett) for future official use
• Updated style definitions to use namespaced extensions instead of x_ prefixed properties
• Changed zero-duration segment representation from segment_duration in extensions to a boolean is_zero_duration field
• Changed zero-duration word representation from word_duration in extensions to a boolean is_zero_duration field

Clarified

• Default behavior of the word_timing_mode field when omitted:
  • Treated as "complete" when the words array is present with complete coverage
  • Treated as "none" when the words array is absent
  • Invalid when the words array is present but incomplete (must explicitly specify "partial")
• Added explicit validation rules for each word_timing_mode value
• Standardized cross-references to the Time Format Requirements section throughout the document

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This discussion was created from the release STJ 0.5.