What the Data for This Category Looks Like
Data for precious metals research reports primarily comes from public reports published by securities research institutes, industry self-regulatory bodies including the Shanghai Gold Exchange and the London Bullion Market Association. Updates follow the global precious metals trading schedule; most domestic reports are released after market close on trading days. Document structures typically include standardized market data tables marked with units such as yuan/gram and USD/ounce, supply and demand balance data, and macro policy correlation analysis. Some in-depth research reports embed long-term price trend charts and complex calculation formulas. The file size of complete single research report PDFs varies widely.
What Constraints Do These Characteristics Impose on the Document Parsing and Chunking Step?
The standardized tables and unit differences in precious metals research reports require the parsing process to support cross-unit field association extraction, to avoid confusing values marked in yuan/gram and USD/ounce. Complex embedded charts and long formulas increase the difficulty of plain text parsing, so structured table parsing capabilities must be enabled. Market data, supply and demand analysis, and institutional viewpoints within research reports have fixed logical connections. During chunking, the contextual binding of adjacent paragraphs must be retained to avoid disrupting analytical logic. Some in-depth research reports have large PDF file sizes, which impose higher requirements on the file processing limit and timeout settings of the parsing process.
Configuration Settings
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
UPLOAD_FILE_MAX_SIZE | 1024 MB | Covers the file size limit of most single in-depth precious metals research report PDFs, to avoid failed large file uploads |
PARSE_FILE_TIMEOUT_SECONDS | 180 seconds | Adapts to the parsing time required for complex tables and long texts, to avoid interrupting the parsing process due to timeout |
max_chunk_size | 800–1200 characters | Matches the logical length of single-paragraph analysis in precious metals research reports, to avoid splitting complete market analysis paragraphs |
chunk_overlap | 100–150 characters | Retains contextual connections between adjacent chunks, to avoid breaking logical coherence across paragraphs |
enable_table_extraction | Enabled | Precious metals research reports contain a large number of standardized market data tables. When enabled, structured fields are extracted instead of plain text |
pdf_parse_engine | marker | Adapts to tables and embedded formulas in complex PDFs, improving parsing accuracy |
custom_chunk_separator | Calibrated via actual testing | Adapts to the line break and title formats of different research reports, to avoid forced separators that damage the integrity of tables and formulas |
The parameter values provided on this page are common starting points for configuration setup. Actual values are affected by material form, data volume, and business rules. Specific issues require targeted analysis. It is recommended to test on your own samples before finalizing settings.
Three Common Misconfigurations
- When uploading a research report PDF with a file size exceeding
UPLOAD_FILE_MAX_SIZE, the interface returns an upload failure prompt. The cause is failure to adjust the upper limit value of this configuration item; the default setting cannot cover the large file sizes of in-depth research reports. - After setting the custom separator to a line break, chunking results either merge multiple table paragraphs or split complete market data rows. The cause is failure to adjust the separation rules based on the table structure of precious metals research reports; forced line break separation will damage the integrity of structured content.
- An error occurs when processing PDFs after enabling the Marker parsing engine, with logs returned in the format
{"detail":"error message"}. The cause is incompatibility between the deployed FastGPT open-source version v4.8.17 and the Marker version, or incorrect configuration of dependency library paths in environment variables.
How to Confirm the Configuration Is Correct
- Upload a test PDF with a single file size not exceeding the configured limit, check that the upload progress bar completes normally with no timeout or error prompts.
- After enabling the table extraction switch, review the parsed text content to confirm that the fields and units of market data tables are fully extracted and not converted to plain text garbled characters.
- After setting the chunk length and overlap parameters, randomly select a segment of parsed text to check that adjacent chunks have overlapping content for logical coherence, with no complete analysis paragraphs split apart.
- Verify the Marker parsing engine configuration: upload a research report PDF containing embedded formulas, confirm that the parsed text retains key parameters and units of the formulas with no content lost.
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.