Reference only; verify against the target FastGPT release and deployment documentation.
What the data for this category looks like
Core data for this category comes from the national unified construction project environmental impact assessment declaration and approval system, ecological environment zoning control results, pollution discharge permit platform, and monitoring data, with irregular update frequency. Commonly processed documents include environmental impact assessment reports, statement forms, approval applications, public participation explanations, technical assessment opinions, environmental impact assessment approvals, and more. Most documents have fixed chapters such as project overview, engineering analysis, and pollution prevention measures, and contain multiple-column statistical tables and professional fields such as environmental impact assessment level and pollution factors. Some documents are exported from cross-system sources and use multiple formats including PDF, Word, and Excel.
What constraints these characteristics impose on the document parsing and chunking step
Parsing rules must adapt to data from multiple sources and formats, avoiding loss of key information due to format differences. Document structures with fixed chapters and professional terminology require maintaining logical coherence during chunking, and avoiding splitting professional terms or disrupting chapter integrity. Irregularly updated documents require flexible parsing configurations, rather than static setups. Multiple-column statistical tables require the parsing process to retain table field associations, preventing data confusion caused by plain text splitting. The risk of serious negative outcomes requires the parsing and chunking link to have high accuracy, ensuring key approval basis is not omitted or damaged.
How to set the configurations
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
chunkSize | 800–1200 characters | A single chunk of environmental impact assessment documents needs to hold complete engineering analysis subsections or the core content of a single table, to avoid splitting professional terms and table structures |
chunkSplitter | Split by heading hierarchy | Environmental impact assessment documents have clear chapter heading hierarchies. Splitting by headings preserves the logical structure of the document, making it easier to match complete business scenarios during subsequent retrieval |
customPdfParse | Enable table structured parsing | Environmental impact assessment PDF documents contain a large number of multiple-column statistical tables. Enabling this feature retains table field associations, avoiding loss of column-level information caused by plain text splitting |
UPLOAD_FILE_MAX_SIZE | 1000 MB | Single environmental impact assessment report files are usually large in size, and need to adapt to large document upload requirements |
PARSE_FILE_TIMEOUT_SECONDS | 600 seconds | Parsing large environmental impact assessment documents takes a long time. Extending the timeout period avoids parsing failure mid-process |
chunkSettingMode | Manual configuration | The structure of environmental impact assessment documents is fixed, but the content varies greatly. Manual configuration allows precise adjustment of chunking rules to adapt to different document types |
Three common mistakes
- Parsing results have mixed fields after uploading multiple-column environmental impact assessment tables. The cause is that
customPdfParseis not enabled, or table structure splitting is not configured, leading to plain text splitting disrupting table column associations. - Embedded images cannot be viewed after uploading an environmental impact assessment PDF document. The cause is that the image extraction function of
customPdfParseis not enabled, and the default PDF parsing may skip embedded image content. - Timeout errors occur when parsing large environmental impact assessment reports. The cause is that
PARSE_FILE_TIMEOUT_SECONDSis set too short, failing to adapt to the parsing time required for large documents.
How to confirm the configuration is correct
- Upload a typical environmental impact assessment statement form document, and check if the parsed chunks retain chapter headings and complete table content.
- Verify the parsing results of multiple-column tables, confirming that each column field is not incorrectly merged or split.
- Upload a single large environmental impact assessment report, confirming that the parsing process does not trigger timeout errors.
- Check the parsed document fragments, confirming that professional terms and environmental impact assessment-specific fields are not truncated.
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.