What this category’s data looks like
Reference only; verify against the target FastGPT release and deployment documentation.
What constraints these characteristics impose on knowledge base retrieval and recall
Advanced chemical materials policy documents are mostly long texts, with clauses tied to document numbers and effective conditions. When chunking, avoid splitting cross-clause content, otherwise complete policy basis cannot be associated during retrieval. Policies are categorized by effective time for different applicable scenarios, so retrieval must add effective time filtering constraints to ensure only currently valid policies are recalled. Policies for specific sub-categories have exclusive clauses, so retrieval must match the applicable advanced chemical materials sub-category field to narrow the recall scope. Large policy files have a high number of chunks, which may cause vectorization anomalies, and update frequency fluctuates with policy releases, so dynamic index triggering logic must be adapted.
Configuration Settings
| Config Item | Recommended Value | Rationale |
|---|---|---|
similarity | 0.75–0.85 | Advanced chemical materials policy clauses use precise wording; this range filters irrelevant policies while retaining core matching results |
limit | Top 6 entries | Policy-related results are limited in number; this value covers all highly relevant policies and avoids redundancy |
usingReRank | Enabled | Re-rank chunked policy clauses by semantic meaning to optimize result display logic |
searchMode | Exact match priority | Adapts to the fixed wording of policy document numbers and clause numbers, reducing false recalls |
datasetSearchUsingExtensionQuery | Disabled | Advanced chemical materials policy data has no additional associated supplementary information, so extended retrieval query is unnecessary |
collectionIds | Specify dedicated dataset ID for advanced chemical materials policies | Restrict retrieval scope to avoid mixing in policies from other categories |
Three Common Mistakes
- Phenomenon: When uploading an advanced chemical materials policy PDF larger than 10MB, some chunks show vectorization anomalies after chunking, with a "vectorization failed" prompt displayed in the interface. Cause: Policy documents are mostly dense long texts, and the number of chunks exceeds the default processing threshold, leading to abnormal semantic vector generation for some chunks.
- Phenomenon: After batch uploading multiple advanced chemical materials policy files and restarting the server, the relevant knowledge base status shows "not ready" with no automatic indexing progress. Cause: Index tasks triggered by batch uploads are not persistently stored, so incomplete indexing queues are not restored after server restart.
- Phenomenon: Standard images embedded in imported advanced chemical materials policy documents cannot be displayed in retrieval results. Cause: Image links in the documents are local paths, which have not been uploaded to the storage service associated with the knowledge base, so resources cannot be loaded during retrieval.
How to Confirm Configuration is Correct
- A single advanced chemical materials policy file larger than 10MB may be uploaded, then the number of chunks and vectorization status checked to confirm no abnormal prompts.
- A retrieval targeting a specific policy clause may be initiated, with verification that the applicable scope and policy effective time of the recalled results match the configuration requirements.
- More than 3 policy files may be batch uploaded, the service restarted, then the knowledge base status checked to confirm automatic indexing tasks start normally.
- Embedded policy attachment images in retrieval results may be checked to confirm they load and display correctly.
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.