# translation Specification Delta

## MODIFIED Requirements

### Requirement: Translation Content Extraction

The translation service SHALL extract content based on processing track type.

#### Scenario: OCR Track translation extraction
- **GIVEN** a document processed with OCR Track
- **AND** the result JSON has `metadata.processing_track = "ocr"`
- **WHEN** translation service extracts translatable content
- **THEN** it SHALL load `raw_ocr_regions.json` for each page
- **AND** it SHALL extract all text blocks from raw OCR regions
- **AND** it SHALL NOT rely on `content.cells` from table elements

#### Scenario: Direct Track translation extraction (unchanged)
- **GIVEN** a document processed with Direct Track
- **AND** the result JSON has `metadata.processing_track = "direct"` or no track specified
- **WHEN** translation service extracts translatable content
- **THEN** it SHALL extract from `pages[].elements[]` in result JSON
- **AND** it SHALL extract table cell content from `content.cells`

### Requirement: Translation Result Format

The translation result JSON SHALL support both element-based and raw OCR translations.

#### Scenario: OCR Track translation result format
- **GIVEN** an OCR Track document has been translated
- **WHEN** translation result is saved
- **THEN** the JSON SHALL include `raw_ocr_translations` array
- **AND** each item SHALL have `index`, `original`, and `translated` fields
- **AND** the `translations` object MAY be empty or contain header text translations

#### Scenario: Direct Track translation result format (unchanged)
- **GIVEN** a Direct Track document has been translated
- **WHEN** translation result is saved
- **THEN** the JSON SHALL use `translations` object mapping element_id to translated text
- **AND** `raw_ocr_translations` field SHALL NOT be present

### Requirement: Translated PDF Generation

The translated PDF generation SHALL use appropriate translation source based on processing track.

#### Scenario: OCR Track translated PDF generation
- **GIVEN** an OCR Track document with translations
- **AND** the translation JSON contains `raw_ocr_translations`
- **WHEN** generating translated reflow PDF
- **THEN** it SHALL apply translations from `raw_ocr_translations` by index
- **AND** it SHALL render all translated text blocks in reading order

#### Scenario: Direct Track translated PDF generation (unchanged)
- **GIVEN** a Direct Track document with translations
- **WHEN** generating translated reflow PDF
- **THEN** it SHALL apply translations from `translations` object by element_id
- **AND** existing behavior SHALL be unchanged