What the data for this category looks like
Policy and regulatory basis documents in the survey and design field originate from housing and urban-rural development ministries, provincial and municipal housing and urban-rural construction authorities, national engineering construction standardization associations, and similar institutions. Updates are released irregularly alongside official policy launches. Most documents follow formal official document formatting. They include issuing authority headers, document serial numbers, multi-level body chapters, and attachment descriptions. Covered fields include policy number, issuing unit, effective date, applicable professional field, and specific clause content. Document numbering uses the "No. XX" format from the issuing serial number. Dates use the "YYYY-MM-DD" format. Some documents are multi-page PDFs or DOCX files with nested styling.
What constraints do these characteristics impose on document parsing and chunking?
The fixed chapter and table of contents structure of survey and design policy documents requires retaining hierarchical associations during chunking. This prevents semantic fragmentation that causes missing retrieval context. Exclusive metadata attached to documents, such as document serial numbers and effective dates, must be accurately extracted to improve retrieval matching accuracy. Large policy documents, such as complete design specifications, take longer to parse. Reasonable timeout parameters must be set. Some documents include attachment content, so multi-file batch parsing workflows must be supported. The maximum upload file size must be compatible with the size of complete specification-style documents.
How to configure settings
Reference only; verify against the target FastGPT release and deployment documentation.
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
chunkSize | 1000–1500 characters | Survey and design policy documents mostly contain long chapter text. This range preserves complete context for individual policy clauses and avoids semantic fragmentation |
chunkSplitter | Split by chapter titles | Policy documents have fixed chapter and table of contents structures. Splitting by titles preserves hierarchical associations of clauses and improves retrieval context completeness |
customPdfParse | Enable metadata extraction | Survey and design policy documents include exclusive metadata such as document serial numbers and effective dates. Enabling this setting allows the metadata to be used as retrieval auxiliary information |
PARSE_FILE_TIMEOUT_SECONDS | 300 seconds | Large policy documents such as complete design specifications take longer to parse. This duration covers parsing workflows for most long documents |
UPLOAD_FILE_MAX_SIZE | 500 MB | Survey and design policy documents may include multi-page PDFs or DOCX files with attachments. This maximum size meets file upload requirements for most scenarios |
Three common configuration errors
- Symptom: Document parsing results in empty metadata fields, unable to extract document serial numbers and effective dates. Cause: The
customPdfParseconfiguration is not enabled, so the parsing component fails to capture official document exclusive metadata. - Symptom: After server deployment, uploading DOCX files returns a 404 error, while local environment runs normally. Cause: Access permissions for the server-side file upload path are not configured, or the parsing node is not mounted to the correct file storage directory.
- Symptom: Search results only match body fragments, with no associated chapter titles. Cause: The
chunkSplittersetting is not configured to split by chapter titles, resulting in lost hierarchical context information during chunking.
How to confirm configuration is applied correctly
- Upload a survey and design policy DOCX file, then check the parsed metadata list to confirm it includes fields such as document serial number and issuing unit.
- Submit a test query such as "Effective date of the provisions for compilation depth of architectural engineering design documents", then check if search results include complete content from the corresponding chapter and associated metadata.
- Upload a single PDF policy document with a size not exceeding 500 MB, wait for parsing to complete, then verify that the parsing status is successful with no timeout errors.
- Adjust
chunkSizeto 800 characters and regenerate chunked content, then compare the chunked text length before and after adjustment to confirm the configuration has taken effect.
The values listed here are common starting points and should be evaluated against sample documents relevant to the particular use case.
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.