What the data for this category looks like
Business documents for hazardous chemicals storage and transportation mainly originate from internal enterprise storage and transportation management systems, emergency management department filing documents, daily loading and unloading work orders, tank area inspection records, and emergency response manuals. The update rhythm varies significantly by document type: daily work orders are updated daily, monthly storage and transportation ledgers are updated weekly, and filing documents are only updated when qualifications or storage plans change. Documents contain mixed-format content, including structured tables (with fields such as hazardous chemical name, CAS number, storage temperature, transportation qualification number, with units including tons, cubic meters, degrees Celsius), long-text process descriptions, and mixed-layout PDF/Word files.
What constraints these characteristics impose on document parsing and chunking
Mixed-format document structures require parsing tools to support both structured table extraction and long-text splitting, to avoid data loss caused by splitting table rows across fields. Forcing long-text emergency response processes to split by fixed length will disrupt the logical coherence of operation steps. Frequently updated work orders and large-volume annual ledgers place additional requirements on parsing speed and upload capacity; default configurations may not adapt to the parsing time and volume limits of large files. The precision requirements for structured fields require retaining field association relationships during chunking, to avoid splitting complete information of the same business unit.
How to set the configurations
Reference only; verify against the target FastGPT release and deployment documentation.
| Configuration Item | Recommended Setting | Rationale |
|---|---|---|
chunkSize | 800–1200 characters | Adapts to the mixed format of hazardous chemicals storage and transportation documents, balancing context integrity and retrieval accuracy |
chunkSplitter | Split by paragraph + heading | Avoids splitting logical nodes of emergency response processes, retaining the coherence of operation steps |
customPdfParse | Enable structured table parsing | Fully extracts fields and data from structured documents such as tank parameter tables and transportation route tables |
UPLOAD_FILE_MAX_SIZE | 2000 MB | Supports upload of large-volume files such as annual storage and transportation ledgers, preventing large filing documents from failing to import |
PARSE_FILE_TIMEOUT_SECONDS | 600 seconds | Adapts to the parsing time of complex filing documents, preventing long file parsing from being interrupted |
chunkSettingMode | Manual configuration | Adjust chunking rules for different document types such as work orders, filing documents, and emergency manuals |
Three common errors
- Phenomenon: After uploading a PDF filing document for hazardous chemicals storage and transportation, the parsing node shows incomplete status, and the log returns a timeout error. Cause: The
PARSE_FILE_TIMEOUT_SECONDSparameter is not adjusted, and the default timeout duration is insufficient to parse large filing documents. - Phenomenon: After uploading a tank parameter table, the parsing result only captures part of the field data. Cause: The structured parsing function of
customPdfParseis not enabled; the default parser only extracts plain text content and loses the structured association information of the table. - Phenomenon: When uploading an annual storage and transportation ledger file, the system prompts that the file volume exceeds the limit and cannot be uploaded. Cause: The
UPLOAD_FILE_MAX_SIZEparameter is not adjusted, and the default upload limit is smaller than the actual volume of the ledger file.
How to confirm the configuration is correct
- Upload a single tank parameter table PDF, check whether the parsing result retains complete table rows and all field information.
- Upload a single long-text emergency response manual, check whether the chunking result splits by paragraph and does not truncate continuous operation steps.
- Upload an annual storage and transportation ledger file with a volume of 1500 MB, check whether the upload and parsing process completes normally without error prompts.
- View the parsing log to confirm there are no records of timeout errors or field loss.
The values provided are common starting points and should be measured against the reader's own samples.
Question material comes from public community discussions. Configuration values are common starting points and should be measured against your own samples. Verified on 2026-09-28.