What the data for this category looks like
Sources of industrial metals investment research data include public data documents from the London Metal Exchange (LME) and Shanghai Futures Exchange (SHFE), industry association weekly reports, annual reports and business interface documents of listed smelting enterprises, and PDF research reports from third-party investment research institutions. Update rhythms are as follows: futures market and warehouse receipt data is updated daily or in real time, industry weekly reports are released weekly, and enterprise interface documents are updated irregularly with business iterations. Document structures include structured tables (such as inventory and position data), HTML-format API interface descriptions, and technical documents with code blocks. Fields involve metal grades, delivery grades, inventory quantities, and trading units, with units including metric tons, lots, and percentages.
What constraints do these characteristics impose on the document parsing and chunking link?
The multi-structure characteristics of industrial metals investment research data impose multiple constraints on document parsing and chunking. Structured inventory and position tables must retain row-column associations to avoid losing data correspondence after splitting. Real-time updated market documents require controlling parsing time to avoid exceeding processing thresholds. HTML-format API interface documents contain code blocks and parameter comments. These code blocks must be identified and retained in full to avoid splitting Java interface method definitions. Mixed unit fields must be extracted synchronously during parsing to ensure that numerical values and unit information can still be associated after chunking.
How to set the configurations
| Configuration Item | Recommended Value Range | Rationale |
|---|---|---|
maxChunkSize | 800–1200 characters | Industrial metals research reports include long paragraphs of industry analysis and structured tables. This range balances contextual association and chunk granularity, avoiding splitting across critical information |
chunkOverlap | 100–150 characters | Retains cross-chunk inventory and price associated data, ensuring complete access to continuous market analysis content during retrieval |
PARSE_TABLE_PRESERVE | Enabled | Industrial metal documents contain a large number of position and inventory tables. Enabling this option retains the row-column structure of tables, avoiding parsing into unordered text |
PARSE_JAVA_ENABLE | Enabled | Industrial metal investment research often involves exchange API interface documents. Enabling this option identifies Java interface method definitions and parameter comments, avoiding parsing failures |
PARSE_FILE_TIMEOUT_SECONDS | 600 seconds | Large exchange data documents or batch HTML interface documents require longer processing time. This threshold covers most scenarios |
UPLOAD_FILE_MAX_SIZE | 1000 MB | Supports uploading large collections of industry research reports and batch interface documents, adapting to the multi-document batch processing needs of industrial metals investment research |
The parameter values provided on this page are common recommended starting points for configuration. Actual values are affected by material form, data volume and business rules. Specific issues require case-by-case analysis, and it is recommended to test on your own samples before finalizing settings.
Three common mistakes
- Phenomenon: Upload a Java interface file after changing its file extension to .txt, and the parsing result is empty. Cause: The Java code parsing logic is not triggered, so interface definitions and comment content cannot be identified.
- Phenomenon: After using chunk mode to call the pushdata API for upload, the task remains in the indexing state for a long time. Cause: The chunk overlap is too high or the parsing timeout threshold is set too small, causing the parsing process to not complete.
- Phenomenon: After uploading an HTML interface document generated by Javadoc, there is no valid parsing content. Cause: The HTML parsing configuration item is not enabled, so code blocks and parameter descriptions in the document cannot be extracted.
How to confirm the configuration is correct
- Upload a single Java interface document, and check whether the parsing result includes interface method definitions and related parameter comments.
- Upload an industry weekly report containing structured tables, and check whether the parsing result retains the row-column association structure of the tables.
- Upload a test HTML interface document, and check whether the number of parsed results displayed on the interface meets expectations.
- View the parsing log, and check whether the parsing time does not exceed the configured timeout threshold.
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.