What the Data for This Category Looks Like
Daily on-site supervision records, acceptance documents, change visas, project payment vouchers, and supervision notices provide the primary data for this category. Most documents are in PDF or Word format. Single documents range from a few pages to dozens of pages. Update frequency adjusts with project progress, typically daily or weekly. Documents include fixed structured fields: project identifiers, timestamps, business content fields, and signature confirmation fields. Common engineering measurement units such as square meters, cubic meters, and ten thousand yuan are used. Some documents contain structured tables and handwritten signature areas.
What Constraints These Characteristics Impose on Document Parsing and Chunking
Fixed document structure and field requirements mean parsing must preserve original formatting and field mappings. This avoids misalignment or missing data. The wide range of document lengths—some files have dozens of pages—creates demands for parsing speed and chunking efficiency. Business content includes many engineering-specific terms and logically coherent business paragraphs. Chunking must avoid splitting complete semantic units of professional content. This reduces subsequent retrieval accuracy. Signature blocks and table areas are independent business sections. Chunking must keep these sections intact. Do not split them across multiple chunks. Frequently updated documents require efficient parsing processes. Delays here will disrupt project progress.
Configuration Settings
These settings apply to FastGPT v4.17.0.
| Configuration Item | Recommended Setting | Rationale |
|---|---|---|
chunkSize | 1000–1500 characters | Engineering consulting supervision documents contain professional paragraphs and structured tables. This length avoids splitting complete business semantic units. It also fits the context limits of most embedding models |
chunkSplitter | Split by paragraph + title | Supervision documents have clear chapter titles and paragraph logic. This splitting rule preserves business context integrity. It avoids semantic breaks |
PARSE_FILE_TIMEOUT_SECONDS | 900 seconds | Single supervision archives may contain dozens of pages. This duration prevents timeout errors during large file parsing |
customPdfParse | Enable structured parsing | Most supervision documents include fixed-format tables and signature blocks. Structured parsing preserves original formatting and field mappings. It avoids post-parsing misalignment |
UPLOAD_FILE_MAX_SIZE | 50 MB | This matches the common size of single engineering archive packages. It prevents upload or parsing failures due to oversized files |
chunkSettingMode | Manual configuration | For the professional characteristics of supervision documents, manual chunking parameter adjustment delivers better fit to business needs than default configurations |
Three Common Configuration Mistakes
- Uploading a supervision archive PDF larger than 10 MB triggers the
timeout of 900000ms exceedederror. This occurs because thePARSE_FILE_TIMEOUT_SECONDSparameter was not adjusted. The default timeout duration is insufficient for structured parsing of multi-page engineering documents. - Chunked results split professional term paragraphs. For example, a supervision notice’s number and core rectification requirements are separated into different chunks. This happens because
chunkSplitterwas not set to split by paragraph + title. Fixed-length splitting directly causes semantic breaks. - Parsed document fields become misaligned or missing. For example, engineering quantity data in tables is separated from corresponding project names. This occurs because structured parsing mode for
customPdfParsewas not enabled. The default parsing cannot preserve the fixed table structure of supervision documents.
How to Verify Correct Configuration
- Upload a typical supervision log PDF. Review the parsed text structure to confirm titles, paragraphs, and tables have no misalignment or splitting errors.
- Go to the knowledge base chunking settings page. Verify that configuration items such as
chunkSizeandchunkSplittermatch the preset values. - Upload a single engineering archive package of the maximum allowed size. Confirm the upload and parsing processes do not trigger timeout or file size limit errors.
- Run a chunking test. Check that generated chunked content retains complete business context and has no semantic breaks.
The values provided here are common starting points. They should be measured against the relevant samples for the specific deployment.
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.