What the data for this category looks like
Data for minor metals-related due diligence reports comes from industry associations, spot exchanges, the General Administration of Customs, and public announcements from mining enterprises. Update cycles fall into three categories: spot data is updated daily, industry analysis reports are updated monthly, and customs import and export data is updated every two months. Document formats include structured Excel/CSV tables, PDFs with text analysis, and image files marking market trends. Core fields include origin, production capacity scale, spot transaction price, total inventory, and trade volume. Corresponding units are none, ton, yuan/kilogram, ton, and ton respectively.
What constraints these characteristics impose on the "document parsing and chunking" workflow
Significant differences exist across document formats from multiple sources, including structured tables, images, and plain text. Multiple parsing engines must be adapted to ensure full data integrity. When batch processing documents with varying update frequencies, group them by cycle for parsing to avoid repeated processing of already parsed historical data. Numeric fields such as production capacity and prices in minor metals reports are strongly correlated. Row groups spanning multiple fields must not be split during chunking, as this will break data logic. For image-based market trend charts, OCR must be used to extract text first, then linked to corresponding text analysis paragraphs, otherwise context information tied to the chart will be lost.
Configuration Recommendations
| Configuration Item | Recommended Setting | Rationale |
|---|---|---|
PARSE_MODE | Auto Mode + Structured Priority | Minor metals reports contain both structured tables and unstructured text; prioritizing table parsing preserves field integrity |
CHUNK_SIZE | 800–1000 characters | The length of single-paragraph analysis or table row groups in minor metals reports mostly falls within this range, avoiding splitting critical data groups |
PARSE_OCR_ENABLE | Enabled | Some reports include market trend chart images; OCR is required to extract text content within the charts |
PARSE_FILE_TIMEOUT_SECONDS | 120 seconds | Large PDF monthly industry reports take longer to parse; this duration prevents timeout interruptions |
ENABLE_TABLE_PRESERVE | Enabled | Production capacity and price tables in minor metals reports must retain row and column associations to avoid data confusion after splitting |
UPLOAD_FILE_MAX_SIZE | 500 MB | Accommodates the standard file size of monthly industry reports, preventing interception due to oversized files |
The parameter values provided on this page are common recommended starting points for configuration. Actual values are affected by material format, data volume, and business rules. Specific issues require targeted analysis, and it is recommended to test on your own samples before finalizing settings.
Three Common Mistakes
- Calling the parsing API with an image URL returns empty text or parsing failure. The cause is that the default parsing engine only supports locally uploaded image files, and remote URL parsing permissions are not configured.
- Calling the workflow API to upload an image returns a parameter error. The cause is failing to pass the binary stream of the
filefield or the correct file identification parameter as required. Some developers mistakenly fill an image URL directly into a non-file type field. - After batch parsing minor metals industry reports, table data in the chunking results is split into scattered paragraphs. The cause is that the
ENABLE_TABLE_PRESERVEconfiguration is not enabled, and table row groups are forcibly split.
How to Verify Correct Configuration
- Upload a sample minor metals report that includes structured tables and market trend charts, then check if the parsed tables retain complete row and column structures, and if image text is correctly extracted.
- Call the parsing API with a test file, verify that the length of the returned chunk list matches the expected range, and that no cross-field splitting occurs.
- After adjusting the
PARSE_OCR_ENABLEconfiguration, upload a document that only contains market trend charts, and confirm that OCR text is correctly added to the chunk content. - Upload a report file larger than the standard size, confirm that the parsing process does not trigger a timeout error, and complies with the
PARSE_FILE_TIMEOUT_SECONDSsetting requirements.
Question material comes from public community discussions. Configuration values are common starting points and should be measured against your own samples. Verified on 2026-09-14.