What the data for this use case looks like
Data for service inquiries and responses for power generation groups originates primarily from internally released power industry policy documents, plant-specific service process manuals, archived operation work orders, and publicly posted service guidelines. Update frequency follows monthly routine updates and immediate updates for sudden policy adjustments. Document types include official PDF policy red-headed documents, Word-format departmental service rules, and Excel-format work order statistical ledgers. Some documents contain structured process steps and material list fields, including effective date, processing time limit, and corresponding business module fields. Supported units include workdays, person-times, megawatts, and others.
Constraints Imposed on Document Parsing and Chunking
Documents for power generation group service inquiries have mixed type characteristics. Official red-headed documents include fixed header and footer redundant information that disrupts effective content extraction, requiring targeted filtering. Structured steps in service process documents must be split by node to prevent semantic fragmentation caused by merging content across business links. Excel-format work order ledgers contain merged cells; cell hierarchy must be restored during parsing to avoid data misalignment. Immediate update documents for sudden policy changes may use non-standard formatting, requiring flexible parsing rules. The processing time limit field is associated with workday units. The field association relationship must be retained during chunking to avoid loss of business context after splitting.
How to Configure the Settings
| Configuration Item | Recommended Setting | Rationale |
|---|---|---|
chunkSize | 800–1200 characters | The effective single-paragraph content length of power generation group service documents mostly falls between 600-1000 characters. This range preserves complete semantic meaning of service steps or policy clauses |
chunkSplitter | Split by paragraph + title | Adapts to the structured title hierarchy and paragraph divisions of service documents, avoiding splitting business content across titles |
customPdfParse | Enable header and footer filtering mode | Targets the fixed header and footer redundant information in red-headed documents, removing irrelevant content via custom parsing rules |
UPLOAD_FILE_MAX_SIZE | 1000 MB | Covers upload requirements for large plant operation and maintenance ledgers and batch policy documents |
PARSE_FILE_TIMEOUT_SECONDS | 600 seconds | Adapts to the parsing time of large Excel ledgers, avoiding parsing failure due to timeout |
chunkSettingMode | Manual configuration mode | Adjust chunking parameters separately for different document types (policy, work order, rule) to adapt to differentiated content structures |
Three Common Misconfigurations
- No search results appear after uploading a PDF file, and a parsing error is shown on the interface. This occurs when the header filtering mode for
customPdfParseis not enabled. Redundant header information in red-headed documents causes valid content to be incorrectly identified as empty. - The actual chunking results do not match the configured values after setting the chunk length. This happens when
chunkSettingModeis not switched to manual configuration, and the platform’s default automatic chunking rules are used instead. - The parsing function entry cannot be located. This is because the custom parsing module was not enabled in the knowledge base management page of FastGPT v4.17.0. This function requires manual activation in this version.
How to Verify Successful Configuration
- A typical red-headed document is uploaded, and the parsed text preview is reviewed to confirm that header and footer content has been removed.
- The knowledge base search test page is accessed, specific service step keywords from the uploaded document are input, and retrieval of the corresponding chunked content is verified.
- The value of
chunkSizeis adjusted, the same document is re-parsed, and whether the character length of the chunks matches the configured range is checked. - An Excel ledger larger than 500 MB is uploaded, and the upload and parsing process is checked for timeout errors.
The values provided here are common starting points. They should be evaluated against local sample data.
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.