What the data for this category looks like
Data sources for shipping port intelligent due diligence reports include port operation daily reports, container throughput statistics tables, berth scheduling logs, maritime supervision documents, investment and financing cooperation contracts, and port planning drawings. Update frequency varies by data type: operational data is updated daily or weekly, regulatory documents are updated per regulatory or project milestones, and investment and financing documents are project-specific. Document formats include structured Excel spreadsheets, formatted PDF reports, scanned drawings, and plain text contracts. Fields and units include professional metrics such as TEU (twenty-foot equivalent unit), berthing duration (hours), berth water depth (meters), and cargo throughput (ten thousand tons). Some documents contain complex formatting such as merged cells and cross-page tables.
Constraints for document parsing and chunking
Merged headers and empty rows in structured Excel spreadsheets require parsing logic to automatically identify headers and skip invalid rows, to avoid splitting complete field groups. Scanned PDF drawings and reports must preserve original formatting to prevent misidentification of professional units and terms. Cross-page monthly throughput reports require associating multi-page content from the same document, to retain contextual coherence during chunking. Large port planning drawing files have significant file sizes. A per-file processing limit must be set during parsing to avoid task timeouts.
How to set the configurations
| Configuration Item | Recommended Setting | Rationale |
|---|---|---|
parse_pdf_strategy | ocr+layout | Shipping port documents include both scanned copies and formatted official reports. Preserving layout prevents misidentification of professional fields and units |
excel_parse_mode | detect_header+skip_empty_rows | Port operation Excel files often contain merged headers and empty rows. Automatically identifying headers and skipping empty rows preserves complete field groupings |
chunk_size | 800–1200 characters | Due diligence reports contain professional terminology and long paragraphs. This range retains the integrity of individual chapters or report blocks |
chunk_overlap | 100–150 characters | Cross-page port throughput reports require contextual association. Overlapping sections ensure retrieval coherence |
parse_image_max_size | 10 MB | Port planning drawing files have large sizes. Limiting this size prevents parsing task timeouts |
PARSE_FILE_TIMEOUT_SECONDS | 300 seconds | Large port due diligence documents include multi-page scanned copies and complex tables. Additional parsing time is needed to complete full processing |
The parameter values provided on this page are common recommended starting points for configuration. Actual values are affected by material format, data volume, and business rules. Specific issues require targeted analysis, and it is recommended to test on your own samples before finalizing settings.
Three common misconfigurations
- Symptom: After uploading a port operation Excel file, fields such as container volume and berth water depth appear misaligned or missing in the vectorized index. Cause: The
detect_headersetting forexcel_parse_modewas not enabled, so the automatic header identification logic failed, leading to incorrect field grouping. - Symptom: After uploading a scanned port supervision report PDF, the OCR recognition result cannot accurately restore the paragraph structure of maritime supervision clauses. Cause:
parse_pdf_strategywas not configured asocr+layout. Using only the basic OCR mode loses document layout information. - Symptom: After uploading a PDF document containing berth planning drawings, the parsing result only retains text descriptions and does not preserve the original drawing images. Cause: Image preservation-related configurations were not enabled, or the mode was incorrectly set to extract only text, causing drawing images to be discarded directly.
How to verify configurations are correctly applied
- A standard port operation Excel test file can be uploaded, and the parsed field list can be checked for full match with the original document's headers, to confirm that the
excel_parse_modeconfiguration is active. - A scanned port supervision report PDF can be uploaded, and the parsed text can be reviewed for retention of the original document's section titles and paragraph breaks, to confirm that the
parse_pdf_strategyconfiguration is active. - A test file containing a single port planning drawing can be uploaded, and the parsed result can be checked for inclusion of content related to the original image, to confirm that the image preservation configuration is active.
- Parsing task logs can be reviewed to confirm that parsing duration meets expected ranges, to confirm that the
PARSE_FILE_TIMEOUT_SECONDSconfiguration is reasonable.
Question material comes from public community discussions. Configuration values are common starting points and should be measured against your own samples. Verified on 2026-09-14.