What data for this category looks like
Business data for hazardous chemicals storage and transportation comes from four main sources: compliance standards released by the Ministry of Emergency Management, internal enterprise tank inspection logs, transportation operation records, and emergency response manuals. Most documents use PDF format, and include large numbers of structured tables (such as hazardous chemical flash points, storage capacity thresholds, and transportation route requirements) alongside plain text operating procedures. Fields cover professional content including hazardous chemical names, CAS numbers, storage conditions, and emergency measures, with units using industrial standard measures such as MPa, ℃, and tons. Compliance documents are updated on a quarterly cycle, while internal enterprise logs are updated daily, creating a clear layered data update rhythm.
What constraints these characteristics impose on knowledge base retrieval and recall
The layered update rhythm of hazardous chemicals storage and transportation requires retrieval systems to support a combined incremental and full synchronization update mechanism. This avoids delayed synchronization for frequently updated log data. The large number of structured tables requires retrieval systems to support table content parsing, otherwise professional parameters within tables cannot be retrieved. The dense professional terminology feature requires retrieval matching logic to adapt to industry-specific vocabulary, preventing generalized retrieval of irrelevant content. Long-text operating procedure documents require a chunking strategy that preserves semantic integrity, avoiding loss of key context after splitting.
How to set the configuration
This configuration is formulated for FastGPT v4.17.0.
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
similarity | 0.75–0.85 | Matches the precision requirement for hazardous chemical professional terminology, to avoid mixing low-relevance results |
limit | Top 10 entries | Balances retrieval efficiency and recall coverage, adapting to the context length of a single inquiry and response |
searchMode | Semantic retrieval | Adapts to semantic matching for professional terminology, outperforming pure keyword matching logic |
usingReRank | Enabled | Performs secondary ranking on initially retrieved results to correct semantic deviations in professional terminology |
datasetSearchUsingExtensionQuery | Enabled | Automatically supplements synonym queries related to hazardous chemicals to improve recall coverage for professional terminology |
collectionIds | Bind compliance document, operation log, and emergency manual collections | Limits retrieval scope to avoid interference from irrelevant data in inquiry and response scenarios |
Three common mistakes
- Phenomenon: When creating a knowledge base, table-format storage and transportation parameter documents cannot be selected, and the interface displays "Current dataset format is not supported". Cause: The structured table parsing plug-in configuration is not enabled, and the table content extraction function is not activated.
- Phenomenon: Knowledge base update delay exceeds 24 hours, and the latest hazardous chemical compliance update documents cannot be synchronized. Cause: Incremental synchronization rules triggered by update time are not configured, and only fixed-cycle full synchronization is used, which cannot adapt to the irregular update rhythm of compliance documents.
- Phenomenon: Batch re-embedding fails after replacing the embedding model, and retrieval results for some hazardous chemical CAS numbers are empty. Cause: Embedding mapping rules are not separately configured for professional terminology fields, leading to failure to correctly encode professional identifiers.
How to confirm the configuration is correct
- Upload a table document containing hazardous chemical storage parameters, initiate a retrieval test, and check whether results include content such as flash points and storage capacity thresholds from the table.
- Trigger an incremental synchronization task, check the system update log, confirm that synchronization delay meets expectations, and that the latest compliance documents have been included.
- Adjust the
similarityparameter, test retrieval for "hazardous chemical tank storage requirements", compare the relevance of results before and after adjustment, and confirm that matching precision meets expectations. - Enable the
usingReRankfunction, compare the ranking of retrieval results before and after enabling, and confirm that the sorting priority of professional terminology has been optimized.
The values provided are common starting points and should be evaluated against local sample data.
Question material comes from public community discussions. Configuration values are common starting points and should be measured against your own samples. Verified on 2026-09-28.