What this category’s data looks like
Documents related to chemical raw materials mainly come from supplier official quotation pages, industry association compliance reports, MSDS safety data sheets, production process white papers, and trade order templates. Update cycles vary widely. Industry compliance reports are updated quarterly. Spot quotation sheets are updated daily. MSDS documents are updated irregularly alongside global chemical standard revisions. Document types include long-form process descriptions, structured parameter tables, and PDF-format compliance files. Core fields include CAS registry numbers, UN dangerous goods numbers, purity, packaging specifications, and delivery lead times. Units cover multiple measurement identifiers such as kilograms, tons, and liters.
Constraints on document parsing and chunking
Structured parameters and compliance identifiers in chemical raw material documents require the parsing process to preserve relational links of original data. This prevents parameters from becoming disconnected from their corresponding identifiers after chunking. Long-form process descriptions need reasonable chunk lengths to ensure full context for process steps. Mixed-format document types require the parsing engine to support multiple input formats including PDF, Excel, and Word. Frequently updated quotation documents require shorter parsing times to avoid delays that impact marketing content timeliness. Extraction of unique identifier fields must be accurately linked to corresponding chunks to provide metadata support for subsequent precise retrieval.
Configuration Settings
| Configuration Item | Recommended Setting | Rationale |
|---|---|---|
chunk_size | 800–1200 characters | Chemical raw material documents include long process descriptions and parameter tables. This length preserves the full context of a single process step or complete parameter group |
chunk_overlap | 100–150 characters | Prevents loss of upstream and downstream context when long process descriptions are split, and supports cross-paragraph parameter association logic |
parse_table_mode | keep_structure | A large number of parameter tables for purity, density, and other metrics exist in chemical raw material documents. Preserving structure ensures that the links between parameters and their corresponding values are not lost |
extract_metadata_fields | ["cas_no", "un_code", "purity", "pack_spec"] | Extracts chemical raw material-specific identifiers and core parameters for subsequent metadata linking and precise retrieval of chunks |
parse_timeout | 120 seconds | Prevents parsing timeout interruptions when processing large compliance documents with multi-page tables |
allow_duplicate_chunks | false | Avoids duplicate storage of chunks with identical parameters, and ensures knowledge base index order matches the original document structure |
The parameter values provided on this page are common 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
- Phenomenon: The chunk ID copy button is unclickable or fails to copy content in the knowledge base document management page. Cause: The
extract_metadata_fieldsconfiguration for extracting unique identifier fields is not set. The system does not generate interactive chunk ID identifiers. - Phenomenon: Custom-split chemical raw material document chunks are automatically deleted after being stored in the knowledge base. Cause:
allow_duplicate_chunksis not set tofalse. The system uses default deduplication rules which cause custom chunks to be lost. - Phenomenon: After uploading a document containing parameter tables, the parsing result only returns unordered plain text without table row and column structure. Cause:
parse_table_modeis not set tokeep_structure. The default parsing mode converts tables into unstructured text.
How to Confirm Correct Configuration
- Upload a chemical raw material document that includes structured parameter tables. Review the parsed preview result to confirm that the table row and column structure is fully preserved.
- Navigate to the details page of an uploaded document. Click the ID identifier of any chunk to confirm that the system triggers the copy operation and copies the ID to the clipboard.
- Upload two chemical raw material documents with identical content. Check the chunk list in the knowledge base to confirm that duplicate content is stored only once or processed according to configuration rules.
- Review the parsing task log records to confirm that there are no timeout errors related to
parse_timeout, and that the document parsing status shows success.
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.