What the data for this category looks like
Policy and regulatory basis data for metal material processing primarily comes from specialized steel and nonferrous metals industry policies released by the Ministry of Industry and Information Technology and the State-owned Assets Supervision and Administration Commission, national metal material-related standards, industry standard documents, and internal corporate compliance production system files. Data update rhythm adjusts with policy release cycles. National standards are revised every 3 to 5 years, and industry policies are updated irregularly as industries adjust. Most documents are structured text, containing fields such as policy document number, issuing authority, effective date, applicable process scope, and technical indicator requirements. They use common metal processing parameter units including megapascals, millimeters, and tons.
What constraints do these characteristics impose on the vector models and indexes link?
The characteristics of metal processing policy data impose multiple constraints on the vector models and indexes workflow. There are many structured fields and professional parameter units. Pure text vector recall fails to accurately distinguish between policy document numbers, effective dates, and technical indicators. Weighted index rules must be set for key fields. Update cycles are irregular, and old and new policies run concurrently. Incremental index synchronization logic must be configured to ensure the latest policies are prioritized for recall. Document fragments often contain continuous process technical requirements. Context must be preserved during chunking to avoid splitting complete compliance clauses. Applicable scopes of different policies have hierarchical differences. Classification tag fields must be added to narrow the recall range and improve matching accuracy.
Configuration Settings
| Configuration Item | Recommended Value Range | Rationale |
|---|---|---|
| Chunk Length | 800–1200 characters | Metal processing policy documents often contain continuous process clauses. This length preserves complete compliance requirement context and avoids splitting technical indicators. |
| Overlap Length | 150–200 characters | Technical indicators in policy documents often span chunks. This overlap length ensures adjacent chunks share key parameter information and improves recall completeness. |
maxToken | 4096 token | Single compliance clauses in metal processing policy documents often contain multiple parameter units. This token limit accommodates complete chunk content and avoids truncating critical information. |
| Similarity Threshold | 0.72–0.80 | Policy matching requires balancing accuracy and coverage. This range filters irrelevant policy documents while recalling eligible compliance basis. |
| Single Search Limit | Top 8 entries | Applicable scopes of metal processing policies have hierarchical differences. Retrieving a moderate number of entries covers compliance requirements across different levels and avoids omissions. |
defaultToken | 2048 token | Policy-related user queries are typically medium-length. This token limit supports standard query expansion context and improves matching results. |
Three Common Misconfigurations
- Phenomenon: Mixing index models and text models leads to out-of-order recall results, with a 200 status code but lower-than-expected matching accuracy. Cause: Model types are not uniformly configured according to the professional parameter characteristics of metal processing policies, and vector space dimensions of different models are inconsistent, resulting in recall results that cannot be sorted effectively.
- Phenomenon: Setting chunk length to 500 characters leads to missing partial chunk content in the interface, with compliance clauses split. Cause: The length of continuous process clauses in metal processing policy documents is not considered, and overly short chunks cannot carry complete technical indicator descriptions.
- Phenomenon: Attempting to introduce relational indexes results in a system prompt of empty fields, and associated policy clauses cannot be loaded. Cause: Relational index rules are not configured for the structured fields of metal processing policies, and the default flat index cannot identify hierarchical associations between policies.
How to Confirm Proper Configuration
Reference only; verify against the target FastGPT release and deployment documentation.
- Upload a single metal processing policy document, check the chunk preview interface to confirm that continuous process and technical clauses are not split during chunking.
- Submit a query about specific process compliance, check the similarity scores of recall results to confirm the score range matches the preset threshold.
- Upload an updated policy document, check the index synchronization log to confirm that the incremental index is completed and old policies are not prioritized for recall.
- Check the system's vector model call log to confirm that the
maxTokenanddefaultTokenconfigurations do not trigger truncation prompts.
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.