What the data for this category looks like
Daily documents for this category include maintenance plans, inspection logs, defect disposal orders, road construction permits, and road property damage compensation forms. Data is sourced from highway maintenance management systems, bridge and tunnel monitoring systems, road administration inspection systems, and traffic flow monitoring systems. Updates occur on a daily basis. Common document fields include maintenance cycle, defect location coordinates, road construction scope, road property damage type, and others. Units include kilometers, square meters, workdays, and others. Individual document length varies widely, ranging from several hundred characters for inspection logs to several thousand characters for maintenance plans.
What constraints these characteristics impose on multi-turn dialogue and prompting
The daily data update feature requires the knowledge base used for dialogue calls to sync with the latest daily data, to avoid referencing outdated maintenance or law enforcement information. The wide range of document lengths requires the multi-turn dialogue context window to accommodate long text content, while limiting the total length of documents retrieved in a single round to prevent context overflow. The multi-source system data feature requires dialogue to isolate data permissions by dimensions such as maintenance work zones and law enforcement areas, ensuring different roles can only access policy documents within their corresponding scope. Documents related to road construction and road property damage have strong correlations, requiring multi-turn dialogue to retain key identifiers from the previous round to accurately associate policy basis for subsequent questions.
How to set configurations
Reference only; verify against the target FastGPT release and deployment documentation.
| Configuration Item | Recommended Setting | Rationale |
|---|---|---|
| Knowledge base sync cycle | Perform incremental sync at 2:00 AM daily | Matches the daily update frequency of category data, ensuring dialogue calls use the latest daily maintenance and law enforcement documents |
| Context window length | 8000–12000 token | Accommodates the wide range of document lengths, meeting the context retention needs for long-text policy interpretation in multi-turn dialogue |
| Single-round document retrieval limit | Top 6 entries | Matches the scale of daily business documents, avoiding excessive irrelevant content that would interfere with the accuracy of policy Q&A |
| Prompt variable configuration | Pass current work section or work zone number via variables | Accurately narrows the retrieval scope, ensuring responses only relate to road property policies and documents for the specified area |
| Dialogue permission isolation | Generate unique chatId by maintenance work zone | Isolates knowledge base data for different work zones, preventing unauthorized access to cross-region policy documents |
| Multi-turn context retention duration | 24 hours | Matches the daily processing cycle of road administration law enforcement and maintenance work orders, avoiding interference from invalid cross-day context |
Three common mistakes
- Symptom: Dialogue returns results that include road property policy documents not from the specified work zone. Cause: Permission isolation was not configured using
chatIdby maintenance work zone, leading to incorrect separation of knowledge base data for different work zones. - Symptom: When executing long-text maintenance plan policy interpretation tasks, the interface shows task completed but throws
The value of "offset" is out of rangeerror. Cause: The total length of documents retrieved in a single round of dialogue was not limited, causing the context offset after long text chunking to exceed the system's processing range. - Symptom: When multiple road construction permits and road property damage compensation forms are submitted, the response only references some of the documents. Cause: The reference scope of multiple documents was not correctly marked in
messages, leading to retrieval scope that does not cover all uploaded files.
How to confirm configurations are correct
- Initiate a policy Q&A for a specified maintenance work zone, check whether the returned results only include relevant documents for that work zone, adjust permission isolation configurations until the expected outcome is achieved.
- Upload multiple documents of the same business type, initiate a multi-turn dialogue, confirm that the
messagesparameter correctly passes the reference identifiers for all documents, and check whether the response covers all uploaded content. - Execute a long-text policy interpretation task, observe interface error messages, adjust the context window length until no offset-related errors occur.
- View the system knowledge base sync logs, confirm that the daily incremental sync task runs normally, and verify whether newly added daily inspection logs have been successfully retrieved.
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.