What Data Looks Like for This Category
Grain reserve sector policy and regulatory basis documents mainly come from official documents issued by the national grain and material reserve bureau and local grain authorities at all levels, local reserve grain management rules, annual reserve regulation documents, and industry standards. Document updates synchronize with policy releases and revocations, with no fixed cycle. Most documents are formal texts with document numbers, issuing units, effective dates, and clauses. Some include attached tables such as reserve scale, depot distribution, and rotation plans. Fields include policy number, applicable level, and execution cycle. Units include ten thousand tons, number of storage depots, rotation batches, and more.
What Constraints These Characteristics Impose on Knowledge Base Retrieval and Recall
The long paragraphs and hierarchical clause structure of official documents require retrieval and recall to retain complete clause context, and avoid cutting clause logic into chunks. Attached tables contain quantitative business data. The system must support vector recall and structured parsing of table content. Policy updates have no fixed cycle. The knowledge base synchronization mechanism must quickly respond to official new policy releases and revocation notices. Policies have clear applicable levels and regions. Retrieval must associate corresponding fields for precise filtering, and avoid invalid recall across levels and regions.
How to Set Configurations
Reference only; verify against the target FastGPT release and deployment documentation.
| Configuration Item | Recommended Setting | Rationale |
|---|---|---|
similarity | 0.75–0.85 | Matches the accuracy requirements for grain reserve policies. Avoids too many irrelevant documents from low thresholds, and avoids missing valid clauses from high thresholds |
limit | Top 8 entries | Policy documents have long lengths. Too many results will exceed the context window. 8 entries can cover core policy-related content |
searchMode | Semantic search + keyword hybrid | Policies contain clear document numbers and clause numbers. Hybrid search can match both text semantics and structured fields |
usingReRank | Enabled | Semantic duplication exists after long documents are chunked. Re-ranking filters redundant results and improves the ranking priority of core clauses |
datasetSearchUsingExtensionQuery | Enabled | Policy queries often contain professional terms. Extended queries supplement synonyms and industry expressions to improve recall coverage |
collectionIds | Specify the exclusive collection ID for grain reserve policies | Isolates content from other knowledge base categories to avoid recalling irrelevant documents |
Three Common Mistakes
- Symptom: Calling the knowledge base interface returns a document access link. Clicking the link prompts "Only support .txt, .m". Cause: Uploaded grain reserve policy documents are in PDF or Word format, and have not been converted to supported plain text formats. This causes the link jump to fail to parse the file type.
- Symptom: A large number of non-grain reserve policy documents appear in retrieval results. Cause: The
collectionIdsconfiguration is not set to specify the exclusive knowledge base collection, leading to cross-category recall of irrelevant content. - Symptom: Retrieval results do not include table data such as reserve scale and depot distribution in policy attachments. Cause: The table structured parsing function is not enabled. Only main text content is extracted, and attachment fields are not covered.
How to Confirm the Configuration Is Correct
- Upload one test grain reserve policy document, trigger retrieval, and check whether returned results only include content from this category of policies.
- Enter a query containing a policy document number, and check whether retrieval results prioritize returning corresponding clause content.
- After enabling the re-ranking function, check whether core policy clauses have a higher ranking than redundant content.
- When calling the interface, check whether the returned link points to a document converted to a supported format, to avoid jump errors.
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.