What the Data for This Category Looks Like
Energy metals investment research data sources include industry research reports, exchange inventory ledgers, spot price documents, mine capacity announcements, and customs import and export data. Update frequencies cover daily, weekly, monthly, and irregular releases. Document formats include structured Excel (with fields such as product name, specification, origin, price), PDF industry research reports, Word capacity planning documents up to 100,000 Chinese characters, and CSV import and export statistical data. Professional fields include lithium concentrate grade, tonnage price, inventory turnover days, and others, with dedicated units and specification parameters bound to each field.
Constraints on Document Parsing and Chunking
Inconsistent field naming exists across multi-source structured data. Precise identification of field boundaries is required to avoid losing the association between fields and their corresponding content during chunking. Long documents (100,000-character Word files, 10,000+ row Excel files) must be split by semantic units to prevent single chunks from exceeding model processing limits. Fields bound to professional terms and units (such as lithium concentrate grade, tonnage price) must retain complete semantic units and cannot be split across chunks. Parsing logic must be configured differently for different document formats, adapting to the paragraph structure of PDF research reports and the row-column structure of Excel files.
Configuration Settings
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
chunk_size | 800–1200 characters | Adapts to the semantic unit length of energy metals professional documents, avoiding splitting complete field and unit combinations |
chunk_overlap | 150–200 characters | Retains contextual association of professional terms, preventing loss of cross-chunk explanatory content during chunking |
parse_excel_header_mode | auto_detect | Adapts to the inconsistent header feature of energy metals Excel documents, enabling accurate identification of field boundaries |
semantic_split_enabled | true | Enables semantic chunking logic to retain complete semantic units of professional fields and units |
max_document_parse_length | 100000 Chinese characters | Matches the parsing requirements of Word documents up to 100,000 Chinese characters |
parse_excel_max_rows | 20000 | Adapts to the processing limit for Excel data with 10,000+ rows |
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. It is recommended to test on your own samples before finalizing settings.
Three Common Mistakes
- Parsing an Excel document results in an error message stating "It appears that an incomplete command or request may have been entered". The cause is failing to adjust the
chunk_sizeparameter, using the default large chunk setting which causes single chunk data volume to exceed the model context window. - Chunk count is too low, with single chunk data volume being excessively large. The cause is failing to enable the
semantic_split_enabledconfiguration, only splitting professional documents by fixed length without retaining semantic unit integrity. - Parsed document fields are missing or unit bindings are incorrect. The cause is failing to set
parse_excel_header_modetoauto_detect, using fixed header parsing for energy metals data sources with inconsistent formats.
How to Verify Proper Configuration
- Upload a single Word document of 100,000 Chinese characters and an Excel document of 15,000 rows, check the parsing task status code to confirm no timeout or parsing failure errors.
- Randomly sample parsed chunk content to verify that professional fields and units are fully bound and not split across chunks.
- Run a knowledge base classification matching test to confirm that chunked content can be accurately recalled, with no recall failures caused by excessively large chunks.
- Check parsing logs to confirm that Excel headers are automatically detected, with field names matching the original data source column names exactly.
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.