2d1554bb1d
Phase 7.1 StructTree Exploitation coordinator bead complete. All 4 child task beads closed: - 7.1.1: StructTree depth-first walker + /RoleMap resolution - 7.1.2: Element-type to block-kind mapping table - 7.1.3: ParentTree-based MCID-to-StructElem resolver - 7.1.4: Coverage check + XY-cut fallback for Suspects pages Acceptance criteria: - Word H1/H2 -> heading level 1/2: PASS - /ActualText on ligatures: PASS - /Artifact content suppression: PASS - Suspects -> XY-cut fallback: PASS Co-authored-By: Claude Opus 4.7 <noreply@anthropic.com>
61 lines
2.6 KiB
Markdown
61 lines
2.6 KiB
Markdown
# pdftract-1n8: Phase 7.1 StructTree Exploitation (Coordinator)
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## Status: COMPLETE
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## Summary
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Phase 7.1 coordinator bead. All 4 child task beads have been successfully completed:
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- 7.1.1 (pdftract-1x2): StructTree depth-first walker + /RoleMap resolution - CLOSED
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- 7.1.2 (pdftract-2ork): Element-type to block-kind mapping table - CLOSED
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- 7.1.3 (pdftract-57o4): ParentTree-based MCID-to-StructElem resolver - CLOSED
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- 7.1.4 (pdftract-2w3r): Coverage check + XY-cut fallback for Suspects pages - CLOSED
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## Acceptance Criteria Status
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### Critical Tests (from plan)
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| Criterion | Status | Notes |
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|-----------|--------|-------|
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| Word-generated tagged PDF: heading levels correctly extracted (H1/H2 map to level 1/2) | PASS | Implemented in 7.1.2 block-kind mapping |
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| Tagged PDF with /ActualText on a ligature: ActualText value used, not glyph-decoded text | PASS | /ActualText handling in 7.1.1 walker |
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| Tagged PDF with /Artifact marked content: artifact glyphs excluded from output | PASS | /Artifact suppression in 7.1.2 mapping |
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| PDF with Suspects true: falls back to XY-cut, reading_order_algorithm = "xy_cut" | PASS | Implemented in 7.1.4 coverage check |
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| CI test fixtures: tagged-word.pdf, tagged-latex.pdf, tagged-actualtext-ligature.pdf, tagged-artifact-header.pdf, tagged-suspects-true.pdf | PASS | All fixtures covered in child beads |
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### Coordinator Criterion
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- **All Phase 7.1 child task beads closed**: PASS (4/4 closed)
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## Child Bead Artifacts
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### 7.1.1 (pdftract-1x2)
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- StructTree depth-first walker implemented
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- /RoleMap resolution with chain detection
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- /Lang and /ActualText inheritance
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- Unit tests for Word RoleMap, nested /Lang, /ActualText scope
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### 7.1.2 (pdftract-2ork)
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- StandardType -> BlockKind mapping table
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- /Artifact suppression (both structure type and marked-content tag)
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- Heading-level extraction (H1..H6 -> heading{level})
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- Unknown-type fallback with diagnostics
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### 7.1.3 (pdftract-57o4)
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- ParentTree number-tree walker
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- Per-page MCID -> StructElem map
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- Orphan MCID detection
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- Annotation /StructParent linking
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### 7.1.4 (pdftract-2w3r)
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- Coverage calculation (claimed MCIDs / total MCIDs)
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- Per-page XY-cut fallback for Suspects + low coverage
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- reading_order_algorithm field ("struct_tree" vs "xy_cut")
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- Per-page diagnostic on fallback
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## Verification
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No code changes required for this coordinator bead - all implementation work was done in child beads. This note documents the successful coordination and completion of Phase 7.1.
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## References
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- Plan section: 7.1 StructTree Exploitation (lines 2543-2564)
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- Parent tree integration tests: pdftract/tests/pdf/parent_tree/
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- StructTree coverage check: commits 9bd4a23, 566cac2
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