What the data for this category looks like
Data primarily comes from local emergency management departments’ hazardous chemicals storage and transportation service guides, corporate compliance filing documents, daily service consultation archive records, and safety inspection logs for storage and transportation links. Compliance documents are updated quarterly to annually to align with national and local hazardous chemical regulatory policies. Service consultation records are updated in real time with daily operations. Internal corporate storage and transportation documents are updated irregularly with process optimizations. Most documents are in PDF format, containing long sections of regulatory text, structured tabulated material lists, emergency response diagrams, and question-and-answer pairs. Fields include storage and transportation volume, approval time limit, responsible entity, and others. Units include tons, cubic meters, and working days.
Constraints on Document Parsing and Chunking
Compliance documents contain long sections of regulatory text and professional terms. Chunking must retain contextual associations of terms to avoid breaking semantic integrity. Tabulated material lists and approval time limit tables, if incorrectly split, will prevent subsequent question-and-answer matching between materials and corresponding requirements. Emergency response diagram images require OCR recognition first; valid text cannot be extracted for chunking otherwise. Real-time updated service consultation records often have large individual file sizes, so support for large file uploads and parsing is required. Professional terms such as critical quantity and flame arrester must retain adjacent context during chunking to avoid semantic misunderstanding.
Configuration Settings
Reference only; verify against the target FastGPT release and deployment documentation.
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
chunkSize | 800–1200 characters | Adapts to long sentences and professional term context in hazardous chemicals compliance documents, avoiding disruption of semantic associations |
chunkSplitter | Split by paragraph + heading | Retains the integrity of service guide process steps and question-and-answer pairs, aligning with document structure characteristics |
customPdfParse | Enable structured parsing mode | Accurately extract tabulated material lists and approval time limits from PDFs, avoiding disordered table content |
UPLOAD_FILE_MAX_SIZE | 1000 MB | Adapts to large-volume service consultation archive files and compliance documents for single-batch uploads |
PARSE_FILE_TIMEOUT_SECONDS | 600 seconds | Addresses time consumption requirements for long document parsing and OCR recognition, preventing timeout interruptions |
chunkSettingMode | Manual configuration | Adjust chunking rules for hazardous chemicals professional terms, adapting to text characteristics of specialized scenarios |
Three Common Configuration Mistakes
- Phenomenon: When uploading a single hazardous chemicals compliance PDF document that exceeds the configured threshold, an "offset out of range" error appears after the parsing progress reaches 90%. Cause: The
UPLOAD_FILE_MAX_SIZEparameter is not adjusted to a value suitable for large files, so the system cannot process file content beyond the preset upper limit. - Phenomenon: After chunking question-and-answer pair documents for service consultations, complete question and answer combinations cannot be matched via retrieval. Cause: The
chunkSplitterparameter is not configured according to the document structure, and fixed character count splitting is used incorrectly, leading to a single question-and-answer pair being split into two different chunks. - Phenomenon: Chunking results differ between service consultation documents uploaded via API and identical documents uploaded directly through the platform. Cause: The
chunkSettingModeandchunkSplitterparameters are not uniformly configured, resulting in inconsistent chunking rules across the two upload channels.
How to Verify Proper Configuration
- Upload a single hazardous chemicals compliance PDF document that meets business requirements, and confirm that the parsing progress completes fully without timeout or offset errors.
- Select a service consultation question-and-answer pair document, and confirm that the complete question and answer content appears in the same retrieval result after searching.
- Upload the same document via API and directly through the platform respectively, compare the chunking results, and confirm that the chunking rules are consistent across both methods.
- Parse a storage and transportation material list document containing tables, and confirm that the table content is fully extracted and retains its structure, with no disordered content.
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.