What data for this category looks like
This category covers documents including sewage discharge permit application forms, implementation reports, self-monitoring plans, ledger records, change applications, permit copies and other types. Core fields include permit number, industry category, emission limits, monitoring requirements, implementation cycle and more. Units include tons/year, milligrams/cubic meter and others. Data sources include the national sewage discharge permit management information platform, enterprise environmental protection ledgers, online monitoring systems, and environmental statistics systems. The update frequency is quarterly. Document structures vary widely: some have structured limit tables, others have long-text implementation instructions, and some documents include cross-system associated identification information.
What constraints do these characteristics impose on the knowledge base retrieval and recall workflow
Data sources for this category are scattered and cross-system, requiring retrieval tools to support unified indexing and recall across multiple data sources, to avoid missing compliance information due to incorrect data source binding. The quarterly update rhythm means the knowledge base synchronization cycle must match the business update frequency, to prevent expired permit limits or ledger requirements from being recalled. Document structures vary widely, with both structured emission limit tables and long-text implementation instructions, so chunking rules for different document types must be adapted to ensure core information such as key limits and ledger requirements is not truncated. As it involves compliance requirements for post-permit supervision, the accuracy of retrieval results directly affects compliance judgments, so low-relevance content must be strictly filtered to avoid incorrect recall of permit limits from non-corresponding industries.
How to set configurations
| Configuration Item | Recommended Setting | Rationale |
|---|---|---|
similarity | 0.75–0.85 | Sewage permit data involves strict compliance requirements. This range filters low-relevance results, balances recall rate and accuracy, and adapts to the semantic retrieval logic of FastGPT v4.17.0 |
limit | Top 10 entries | The number of results returned per retrieval should not be too large, to avoid context overflow, and meets the information density requirements of compliance Q&A |
searchMode | Semantic Retrieval | Adapts to the professional terminology and associated logic of sewage discharge permits, and is more likely to match industry standard expressions than full-text retrieval |
usingReRank | Enabled | Performs secondary ranking on recall results, corrects local deviations from semantic retrieval, and ensures key limits and ledger requirements are displayed first |
datasetSearchUsingExtensionQuery | Enabled | Automatically expands synonymous expressions related to policies, such as matching "sewage discharge permit implementation report" with associated content like "quarterly self-monitoring ledger" |
collectionIds | Fill in according to the actually bound sewage discharge permit knowledge base collection | Precise limitation of the retrieval scope to avoid mixing in documents from other ecological and environmental categories |
Three common mistakes
- Phenomenon: Tool calls and knowledge base searches cannot be linked, and the console shows no return content for interface requests. Cause: The context binding between the knowledge base and tool calls is not configured correctly, causing retrieval results to fail to be passed to downstream compliance verification tools.
- Phenomenon: Uploaded sewage discharge permit-related files remain in a loading state in an offline environment, and return to normal after connecting to the internet. Cause: FastGPT needs to access external resources to complete file parsing and index initialization, and dependent resource loading cannot be completed in an offline environment.
- Phenomenon: Semantic retrieval cannot recall target sewage discharge permit documents, but full-text retrieval can match normally. Cause: The professional terminology vector model for sewage discharge permits is not adapted, or the
similaritythreshold is set too high, filtering out accurate documents that meet the requirements.
How to confirm successful configuration
- Submit a test query, such as "What are the sewage discharge permit emission limits for a specific industry", and verify that returned results include core limit content from corresponding documents.
- Review retrieval logs to confirm that configuration items including the
similaritythreshold andlimitcount have taken effect, and that the number of returned results matches the set value. - Test basic retrieval in an offline environment to confirm that local knowledge base queries can be completed without mandatory access to external domain names.
- Test the extended query function, input simplified expressions such as "sewage ledger", and verify that associated documents including "self-monitoring plan" and "implementation report" can be recalled.
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.