What This Category's Data Looks Like
Policy and regulatory basis data for the basic chemical industry mainly comes from official announcements released by the Emergency Management Department Hazardous Chemicals Supervision Department, Ministry of Industry and Information Technology Raw Materials Industry Department, and Ministry of Ecology and Environment Atmospheric Environment Department, as well as industry standard texts released by the China Petroleum and Chemical Industry Federation. Data updates are triggered irregularly when new policies are issued. Individual document lengths range from hundreds to tens of thousands of words. All documents follow a unified structure including document number, effective date, applicable scenario, and clause details. Fields include policy category, regulatory body, compliance requirements, and penalty clauses. Units are mostly identified by clause items and document numbers.
What Constraints These Characteristics Impose on Knowledge Base Retrieval and Recall
The long text span of basic chemical policy documents requires the retrieval link to retain clause context, to avoid clause disconnection caused by direct segmentation. Policies have clear effective dates and document numbers, so recall results must support time-based filtering to prevent returning expired policy content. Fields include precise regulatory bodies and compliance requirements, so retrieval must support targeted field matching to stop policies from unrelated categories from appearing in results. Data updates have no fixed cycle, so the knowledge base must support fast incremental updates by document number or release time to maintain the timeliness of retrieval data.
Configuration Settings
Reference only; verify against the target FastGPT release and deployment documentation.
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
similarity | 0.75–0.85 | Basic chemical policy texts are rigorous, requiring a high matching degree to ensure compliance and avoid recalling irrelevant policy entries |
limit | Top 10 entries | There are many policy entries for the basic chemical industry; too many results will exceed the context window and affect answer accuracy |
searchMode | Hybrid vector retrieval + keyword retrieval | Policy texts contain both professional terminology and clear keywords; hybrid mode balances semantic matching and precise keyword hits |
usingReRank | Enabled, retain top 5 entries after reranking | Similar expressions exist in basic chemical industry policies; reranking filters semantically duplicate entries and improves result relevance |
datasetSearchUsingExtensionQuery | Enabled | Policy queries often contain professional abbreviations (such as VOCs, hazardous chemicals); optimization supplements associated terms to improve recall coverage |
collectionIds | Bind exclusive policy collection | Avoid mixing policy documents from other categories to ensure precise retrieval scope |
Three Common Mistakes
- Phenomenon: Retrieved policy content is incomplete, with single clauses split and losing context association. Cause: Direct segmentation without setting context overlap leads to inability to restore complete logic after policy clauses are split.
- Phenomenon: Single-round retrieval takes more than 10 seconds, and response speed does not meet expectations. Cause:
usingReRankis not enabled, or too many entries are retained after reranking, and thelimitvalue is not restricted, leading to excessive redundant computation. - Phenomenon: Returned results include local image addresses that cannot be accessed via external links. Cause: Local image links in policy documents were not replaced when importing to the knowledge base, and external resource mapping rules were not configured.
How to Confirm Configuration Is Correct
- Upload a test policy document, submit a query containing the corresponding policy document number, and check whether the returned results include the target clause.
- Adjust the
similarityvalue, observe changes in the matching degree of recall results to confirm that the threshold setting takes effect. - Submit a query containing professional terms, and check whether recall results for associated terms are supplemented after
datasetSearchUsingExtensionQueryis enabled. - View retrieval logs to confirm that the number of returned results matches the
limitvalue as expected.
The values provided 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.