What this category’s data looks like
Business data for hazardous chemicals storage and transportation mainly comes from compliance specifications issued by emergency management departments, standardized operation documents of storage and transportation enterprises, and ledger records of safety supervision departments. Data updates are immediate when new regulatory rules are released, with regular monthly updates. Most documents use a chapter-based structure, including modules such as hazardous chemical classification, storage and transportation environment requirements, business approval processes, and emergency response steps. Fields include hazardous chemical CAS numbers, storage and transportation temperature thresholds, approval material lists, compliance clause numbers, and more. Most units use industry standard units such as degrees Celsius, cubic meters, and tons.
What constraints these characteristics impose on the knowledge base retrieval and recall link
The chapter-based document structure requires retrieval results to include the corresponding chapter title. This prevents users from receiving information disconnected from business process context. Precise fields such as CAS numbers and compliance clause numbers must support exact matching, to avoid deviations caused by semantic matching. Frequently updated compliance data requires the knowledge base synchronization cycle to not exceed one month. Otherwise, the latest regulatory requirements cannot be covered. Industry-specific units such as degrees Celsius and cubic meters require retaining unit information during chunking. This prevents matching failures caused by missing units during retrieval.
How to configure the settings
| Configuration Item | Recommended Setting | Rationale |
|---|---|---|
similarity | 0.75–0.85 | Adapts to the precision of professional terminology for hazardous chemicals storage and transportation, filters irrelevant content with low similarity, and covers semantic deviations in professional expressions |
limit | Top 8 entries | Recalls sufficient business process details per batch, avoiding insufficient single results that cannot cover complete handling steps |
searchMode | hybrid | Combines semantic matching and exact matching, adapting to the dual needs of professional fields such as CAS numbers and natural language queries |
usingReRank | Enabled | Re-ranks recalled results to filter redundant content unrelated to chapter titles and business processes |
datasetSearchUsingExtensionQuery | Enabled | Automatically expands query terms, supplements industry synonyms for hazardous chemicals storage and transportation, improving recall coverage |
collectionIds | Bind exclusive hazardous chemicals storage and transportation dataset | Isolates knowledge base data from other categories, avoiding recall of irrelevant business content |
This document adapts to the knowledge base configuration logic of FastGPT v4.17.0.
Three common mistakes
- Phenomenon: Retrieval results only return chunked main text, without the corresponding chapter title. This makes it impossible to clarify the link of the business process. Cause: Chapter title metadata was not retained during chunking, or metadata recall was not enabled in the retrieval configuration.
- Phenomenon: Returned results include unauthorized knowledge base reference links. These cannot be directly used for internal business handling documents. Cause: Reference link output was not disabled in system configuration, or link fields in metadata were not filtered.
- Phenomenon: No corresponding fields are returned after passing the
metadataparameter when calling the knowledge base collection creation interface. The parameter does not take effect. Cause: The metadata storage switch was not enabled when creating the collection, or the metadata fields were not correctly bound during interface calling.
How to confirm the configuration is complete
- Upload a compliance document for hazardous chemicals storage and transportation, initiate a query containing a specific CAS number, and check whether the returned results include the corresponding chapter title.
- Initiate a query related to business processes, verify that there are no additional knowledge base reference links in the returned results.
- Pass a test
metadataparameter when calling the knowledge base query interface, check whether the returned results include the passed metadata fields. - Adjust the
similarityparameter range, observe the change in the number of recalled results, confirming that the configuration has taken effect.
The values given are common starting points and should be measured against the reader's own samples.
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.