What the data for this category looks like
Data for special steel intelligent due diligence reports mainly comes from factory quality inspection sheets of special steel manufacturers required for financial institution due diligence, incoming material test reports from downstream customers, industry association grade standard documents, and public special steel industry analysis materials. The data update rhythm varies by scenario: single-batch production quality inspection data updates with production processes, while industry grade standard documents have longer update cycles. Most documents are fixed-structure PDF, Excel or Word files. Core fields include grade identification, chemical composition parameters, mechanical performance indicators, and dimensional tolerance ranges. Supported units include MPa, mm, and others.
What constraints do these characteristics impose on the "document parsing and chunking" link
The fixed structure of special steel documents and variable header order between enterprises require the parsing module to adapt to header layouts, avoiding field misalignment that reduces the accuracy of due diligence field matching. Differences in document formats across multiple sources require parsing tools to support multiple input forms such as PDF tables and Excel cell data, covering all material types required for due diligence. The strong binding relationship between units and fields requires the parsing process to fully retain unit information, avoiding mixing units of different parameters which would cause due diligence data distortion. Scenarios where both long documents (such as special steel industry analysis manuals used for due diligence) and short documents (such as single-batch quality inspection sheets) coexist require chunking strategies to balance the integrity of long paragraphs and efficient splitting of short documents, ensuring semantic completeness during retrieval.
How to set configurations
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
PARSE_FILE_TIMEOUT_SECONDS | 900 seconds | Special steel industry manuals have relatively large per-page content, and sufficient time must be reserved when batch parsing multiple due diligence documents |
maxChunkSize | 800–1200 characters | Adapts to the paragraph length of special steel quality inspection reports, avoiding splitting complete data of key mechanical performance or chemical composition |
chunkOverlap | 100–150 characters | Retains contextual association between adjacent chunks, ensuring complete semantics of key parameters |
ENABLE_MARKER_PARSER | Enabled | Special steel documents mostly contain PDFs with complex tables, and the Marker parsing module has more stable extraction effects for table content |
UPLOAD_FILE_MAX_SIZE | 2000 MB | Supports batch uploading multiple special steel quality inspection ledgers or industry standard documents |
PARSE_TABLE_MODE | full | Fully extracts fields, corresponding values and units in tables, avoiding omission of key binding information |
The parameter values provided on this page are common recommendations used as a starting point for configuration. Actual values are affected by material form, 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 errors
- Phenomenon: After enabling
ENABLE_ENHANCED_PARSEin version4.9.0, field missing or misalignment occurs when parsing special steel PDF tables. Cause: The enhanced parsing module of this version has deviations in adapting to special steel-specific table headers. - Phenomenon: Units do not match fields in parsing results, for example, binding the mm unit to a chemical composition parameter item. Cause:
PARSE_TABLE_MODEis not set tofull, and the association extraction rule for fields and units is not enabled. - Phenomenon: A
504 Gateway Timeouterror is returned when batch uploading multiple special steel quality inspection reports. Cause: The set value ofPARSE_FILE_TIMEOUT_SECONDSis lower than the actual required parsing duration.
How to confirm configurations are correct
- Upload a standard special steel factory quality inspection PDF document, and check whether all table fields and corresponding units are fully extracted in the parsed text.
- Check the switch status of
ENABLE_MARKER_PARSERto confirm that it matches the format of the currently pending document. - Test the chunked results to confirm that no complete mechanical performance or chemical composition paragraph is split in a single chunk.
- Check the parsing logs to confirm that no
PARSE_FAILEDerror code appears.
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.