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Use UUID-based URNs for page and chunk IDs (#703)

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Page and chunk document IDs were deterministic ({doc_id}/p{num},
{doc_id}/p{num}/c{num}), causing "Document already exists" errors
when reprocessing documents through different flows. Content may
differ between runs due to different parameters or extractors, so
deterministic IDs are incorrect.

Pages now use urn:page:{uuid}, chunks use
urn:chunk:{uuid}. Parent- child relationships are tracked via
librarian metadata and provenance triples.

Also brings Mistral OCR and Tesseract OCR decoders up to parity
with the PDF decoder: librarian fetch/save support, per-page
output with unique IDs, and provenance triple emission. Fixes
Mistral OCR bug where only the first 5 pages were processed.
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cybermaggedon 2026-03-21 21:17:03 +00:00 • committed by GitHub
parent 1a7b654bd3
commit 96fd1eab15
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10 changed files with 694 additions and 286 deletions
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4
tests/unit/test_decoding/test_pdf_decoder.py
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@ -171,8 +171,8 @@ class TestPdfDecoderProcessor(IsolatedAsyncioTestCase):
mock_output_flow.send.assert_called_once()
call_args = mock_output_flow.send.call_args[0][0]
# PDF decoder now forwards document_id, chunker fetches content from librarian
assert call_args.document_id == "test-doc/p1"
# PDF decoder now forwards document_id with UUID-based URN
assert call_args.document_id.startswith("urn:page:")
assert call_args.text == b"" # Content stored in librarian, not inline
@patch('trustgraph.base.flow_processor.FlowProcessor.add_args')