Document migration
What Happens to Provenance When You Convert a PDF?
Preserve the exact source hash and available metadata; do not manufacture authorship, approval or custody evidence.
The safe operating rule
Preserve the source. Label extraction and inference. Keep unknowns unknown. Record warnings and failures. Reconcile every batch.
What UD does not claim
No perfect conversion, 100% OCR accuracy, compliance preservation, legal equivalence, accepted archival-standard status or freedom from manual review is promised.