What Data Looks Like for This Category
Daily documents for printing and packaging processing include pre-press files, imposition sheets, printing process sheets, ink color matching records, first article sample approvals, barcode inspection, die-cutting and lamination records. Data sources include customer manuscripts, color management systems, printing press data, ink and substrate batch records, spectrometers and barcode detectors. Data is updated following each order, each production batch, or each plate change. Documents include fields such as number of printing colors, ink model, die-cutting accuracy, barcode number, batch number. Units include gram weight, millimeters, color number and other specific identifiers.
Constraints Imposed on Document Parsing and Chunking
Documents in this category have both structured parameters and semi-structured layout features, with high update frequency. Parsing and chunking workflows must balance field extraction accuracy and processing efficiency. Documents must carry content versions, color parameters and packaging structure information at the same time. Plate-making errors can be replicated quickly in bulk. Chunking must retain the association between section titles and corresponding process parameters to avoid losing critical context during retrieval. Data formats vary widely across sources, so parsing adaptation for multiple document types must be supported. Large single-document volume and multi-page content parsing duration requirements must also be accommodated.
How to Configure Settings
The following configurations are based on FastGPT v4.17.0.
| Configuration Item | Recommended Setting | Rationale |
|---|---|---|
customPdfParse | Enabled | Printing and packaging documents often contain non-standard layouts such as impositions, color marks, and barcodes. Custom parsing can accurately extract key business fields such as ink models and batch numbers |
chunkSize | 800–1200 characters | Documents contain complete process parameters for a single batch. This length adapts to the complete expression of single-process content and avoids truncating critical information during chunking |
chunkSplitter | Split by title + paragraph | Retains the association between section titles and corresponding process content, enabling quick location of parameters and requirements for specific processes during retrieval |
PARSE_FILE_TIMEOUT_SECONDS | 300–600 seconds | A single imposition sheet or process sheet may contain multi-page parameters. Sufficient time is required to complete parsing and field extraction for all content |
UPLOAD_FILE_MAX_SIZE | 1000 MB | Supports batch uploading of process documents for entire order batches, adapting to large-scale document processing needs of enterprises |
chunkSettingMode | Manual configuration | Adjust chunking rules for the special layout of printing and packaging documents to match the association requirements of business fields |
Three Common Misconfigurations
- Symptom: No key fields such as ink models or barcode numbers appear in the parsing result after uploading a PDF process document. Cause:
customPdfParseis not enabled, and parsing rules are not adjusted for the non-standard layout of printing and packaging documents. This prevents key business fields from being correctly extracted. - Symptom: An interface timeout error is returned when batch uploading imposition sheets for an entire order batch. Cause:
PARSE_FILE_TIMEOUT_SECONDSis set to 120 seconds. This does not accommodate the full parsing duration of multi-page process documents, exceeding system parsing limits. - Symptom: A service deployed with a specific large language model cannot extract response fields from PDF parsing results. Cause:
customPdfParseoutput rules matching the model's field extraction format are not configured. This causes parsing results to be incompatible with model requirements.
How to Verify Successful Configuration
- Upload a PDF document containing an imposition sheet and ink color matching records. Check whether the parsing result includes key business fields such as the number of printing colors and ink models to confirm that the
customPdfParseconfiguration takes effect. - Upload a 10-page printing process sheet document. Check whether the parsing progress completes within the duration set by
PARSE_FILE_TIMEOUT_SECONDS, with no timeout error prompts. - Retrieve the chunked document content. Confirm that each chunk contains the corresponding section title and process parameters to verify the effect of the
chunkSplitterconfiguration. - Upload a batch process document package larger than 500 MB. Confirm that the upload progress proceeds normally, with no restriction errors related to
UPLOAD_FILE_MAX_SIZE.
The values provided are common starting points and should be evaluated against applicable deployment samples.