What data for this category looks like
The due diligence data for the coatings and inks category comes primarily from production compliance reports published by industry associations, public enterprise production ledgers, raw material purchase vouchers, and third-party test documents. Data updates align with monthly production batches, quarterly compliance spot checks, and annual industry trend analyses. Document formats include structured tables, long-form process descriptions, and scanned test pages. Core fields include solid content, fineness, and VOC emissions. Their respective units are dimensionless values, micrometers, and grams per liter. Some documents also include corresponding national standard numbers and batch identifiers.
What constraints do these characteristics impose on document parsing and chunking?
The document characteristics of the coatings and inks category create multiple constraints for parsing and chunking workflows. Mixed multi-source document formats — structured tables, long-form process descriptions, scanned test pages — require the parsing workflow to distinguish between text-based and scanned documents, and call basic parsing and OCR capabilities separately. The high-precision numerical attributes of core fields (fineness measured in micrometers, VOC emissions measured in grams per liter) require chunking to retain the binding relationship between fields and their units, to avoid breaking this association after splitting. The demand for batch-updated documents also requires the parsing workflow to support parallel processing of multiple due diligence documents with different structures, while unifying chunk granularity to ensure consistency for subsequent retrieval.
How to set configurations
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
PARSE_FILE_TIMEOUT_SECONDS | 300–600 seconds | Coatings and inks due diligence documents often include multi-page scanned test reports and long-form process descriptions. Standard default timeout durations are insufficient to complete full parsing |
maxChunkSize | 800–1200 characters | Most core fields are high-precision numerical values and short descriptive text. Excessively long chunks lead to excessive irrelevant content during retrieval, while excessively short chunks break field associations |
chunkOverlap | 100–150 characters | Field and unit binding relationships across chunks must be retained. Overlap length must cover the full statement range of core fields |
ENABLE_OCR_PARSE | Enabled | Some due diligence documents are scanned test reports, and OCR is required to extract text content |
PARSE_TABLE_STRICT_MODE | Relaxed mode | Tables in coatings and inks documents often have merged cells and non-standard formats. Relaxed mode improves the completeness of table data extraction |
RECALL_CHUNK_COUNT | Top 6–8 entries | Associated information for core fields is often distributed across adjacent chunks. Too many recalled entries introduce irrelevant content, while too few result in lost critical associations |
The parameter values provided on this page are common starting points for configuration setup. Actual values are affected by material format, data volume, and business rules. Specific issues require targeted analysis. It is recommended to test on your own samples before finalizing settings.
Three common mistakes
- Symptom: Empty fields are returned when parsing scanned coatings and inks test reports. Cause: The
ENABLE_OCR_PARSEconfiguration is not enabled, so text content on scanned pages cannot be recognized. - Symptom: The platform returns a
504 Gateway Timeouterror, indicating a parsing timeout. Cause: ThePARSE_FILE_TIMEOUT_SECONDSparameter is not adjusted. The default timeout duration is insufficient to complete parsing and OCR processing for multi-page scanned documents. - Symptom: Fineness values and micrometer units are separated during post-chunk retrieval. Cause: The chunk overlap length is set too small, and the full binding range of core fields and units is not covered.
How to confirm configurations are correctly set
- Upload one scanned coatings and inks test report, and verify that the parsed results include text content for core fields such as VOC emissions and fineness.
- Upload multiple due diligence documents with different structures, check the task status of the parsing queue, and confirm that there are no batch parsing failures.
- After adjusting the chunk configuration, generate test chunk results, and verify that the binding relationship between fields and units is retained in adjacent chunks.
- Check the platform's parsing logs, confirm that the
PARSE_FILE_TIMEOUT_SECONDSparameter has taken effect, and there are no timeout error records.
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.