What this category of data looks like
Policy and regulatory reference documents for the metal material processing field mainly come from public normative documents and industry standards issued by the Ministry of Industry and Information Technology, the State-owned Assets Supervision and Administration Commission, and local industry regulatory authorities. Document updates follow policy revisions or standard iterations, with no fixed cycle. Most documents are structured clauses, including policy document numbers, issuing authorities, effective dates, applicable metal categories such as carbon steel and aluminum alloy. They include technical parameter fields with units such as megapascals (MPa), millimeters (mm), and percentages (%). Some attachments contain batch metal grade comparison tables and test process descriptions.
What constraints do these characteristics impose on document parsing and chunking
This category of policy documents has mixed structured clauses and attachment tables, which creates multiple constraints for document parsing and chunking. Structured clauses must retain the binding relationship between document numbers and corresponding content to avoid splitting critical information apart. Metal grade comparison tables and test parameter tables in attachments must retain their row and column structure, and cannot be split into scattered text. Continuous clauses across pages must be automatically merged to prevent content breaks from affecting the accuracy of subsequent Q&A. A large number of professional units in the documents must be bound to corresponding parameters to avoid separation of units and values after parsing.
How to configure settings
Reference only; verify against the target FastGPT release and deployment documentation.
| Configuration Item | Recommended Setting | Rationale |
|---|---|---|
chunkSize | 800–1200 characters | Single clauses in metal processing policy documents are mostly 500–1000 characters long. This range can fully cover a single policy clause and avoid split separation |
chunkSplitter | Split by title + paragraph | Policy documents use clause titles as core identifiers. Splitting this way retains the binding relationship between document numbers and clauses |
customPdfParse | Enabled | Adapts to mixed tables, formulas, and structured clauses in policy documents, improving parsing completeness |
PARSE_FILE_TIMEOUT_SECONDS | 600 seconds | Large policy documents include multi-page attachment tables, requiring sufficient time to complete full parsing |
UPLOAD_FILE_MAX_SIZE | 1000 MB | Some industry standard documents include batch metal grade data, supporting larger file uploads |
chunkSettingMode | Manual configuration | Can flexibly adjust chunking parameters for different types of policy documents (pure clauses / with attachments) |
Three common configuration mistakes
- Phenomenon: PDF upload shows parsing timeout and returns status code 504. Cause: The
PARSE_FILE_TIMEOUT_SECONDSparameter is not adjusted. The default timeout duration is insufficient for parsing policy documents with multi-page attachment tables. - Phenomenon: After importing a metal grade CSV table, only the first two columns of data are recognized. Cause: The table recognition mode of
customPdfParseis not enabled. The default parsing logic only extracts text columns and does not fully read multi-column structured data. - Phenomenon: After chunking, policy document numbers and corresponding clauses are separated, making association and matching impossible during Q&A. Cause:
chunkSplitteris configured to split by line breaks, and the association between titles and clauses is not retained.
How to confirm the configuration is correct
- Upload a single-page policy clause document, check the parsed chunk results, and confirm that clauses and document numbers are not split.
- Upload a CSV file containing a metal grade table, verify that the number of parsed data columns matches the original file.
- Upload a large policy document, check the parsing progress, and confirm that no timeout prompt is triggered.
- Adjust the
chunkSizeparameter, upload a test document, and check if the chunk length matches the expected configuration.
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.