Data Profile for This Category
Data for this category comes from multi-stage production outputs of factories making precast concrete (PC) components, pipe piles, bridge components, and municipal products. Common daily documents include component detail drawings, steel bar cutting lists, mold inspection records, pouring and vibration logs, curing records, and demolding and factory inspection reports. Data sources include BIM or detailed design files, steel bar and concrete batch ledgers, mold table and curing kiln operation data, laboratory test results, and QR code traceability systems. Update frequency follows per single component, per batch, or per kiln. Most document structures combine structured fields and engineering drawing elements. Fields cover component numbers, steel bar specifications, curing duration, strength test values, and similar items. Common units use engineering standard measurements such as millimeters, cubic meters, and megapascals.
Constraints for the Chunking Stage
The multi-format, strongly correlated document characteristics of this category create multiple constraints for the chunking process. Component detail drawings must be split into accurate component and embedded part lists. Chunking must retain drawing coordinate and size association information to avoid breaking engineering logic during splitting. Structured documents such as steel bar cutting lists and batch ledgers must avoid splitting that damages field integrity. This ensures subsequent audits can link corresponding batch component data. Documents updated per batch, such as curing records and demolding inspection reports, must retain batch association information during chunking. This supports full-process data tracing for single kiln or batch components during process quality audits. Large engineering drawings and long ledger documents increase parsing time. Chunking rules must balance content integrity and parsing efficiency.
Configuration Recommendations
| Configuration Item | Recommended Setting | Rationale |
|---|---|---|
chunkSize | 800–1200 characters | Aligns with the business block length of documents such as steel bar cutting lists and curing records, and avoids splitting that damages the integrity of component numbers and batch information |
chunkSplitter | Split by paragraphs and fixed delimiters | Adapts to text descriptions accompanying detail drawings and structured sections of inspection reports, and retains business association logic |
PARSE_FILE_TIMEOUT_SECONDS | 600 seconds | Meets parsing requirements for engineering drawing documents over 10 MB, and prevents mid-parsing timeouts for large drawings |
UPLOAD_FILE_MAX_SIZE | 1000 MB | Supports uploads of complete single-batch ledgers or large engineering drawing files |
customPdfParse | Enabled | Optimizes parsing accuracy for mixed formats of vector elements and text in component detail drawings |
chunkSettingMode | Manual configuration | Adjusts chunking rules for different document types (drawings, ledgers, logs) to adapt to the multi-format document characteristics of this category |
Three Common Misconfigurations
- Symptom: Component numbers and size information are split into different chunks after chunking. Cause: The
chunkSplitterrule is not adjusted based on document business associations. Default character-based splitting damages business block integrity. - Symptom: Parsing progress stalls and returns a timeout error when uploading a 15 MB Word engineering drawing. Cause:
PARSE_FILE_TIMEOUT_SECONDSis not adjusted to a value suitable for large documents. The default timeout duration is insufficient for complex drawing parsing. - Symptom: Fields appear misaligned or missing after uploading a steel bar cutting list Excel file. Cause: The parsing mode is not adjusted for structured table documents. The default text parsing logic cannot recognize row and column association relationships in tables.
How to Verify Proper Configuration
- Upload a single typical steel bar cutting list. Check if chunked results retain complete associated business fields. Adjust configurations to align with business logic.
- Upload an engineering drawing document over 10 MB. Confirm parsing completes without timeout errors. Verify the timeout configuration matches the document size.
- Test chunking effects separately for different document types such as detail drawings, ledgers, and logs. Adjust chunking parameters to fit the structural characteristics of each document type.
- Check that the total size of uploaded files does not exceed the configured maximum limit. Ensure large batch documents can complete upload and parsing normally.
The values provided here are common starting points. They should be evaluated against the relevant deployment’s sample documents. This configuration reference was created for FastGPT v4.17.0.