What the documents look like
Certificates of origin serve import-country tariff treatment and customs clearance, and they are not necessarily bound by letter of credit terms. That difference concentrates retrieval needs on three families of material: origin rules, certificate completion wording, and the customer's clearance requirements. The documents handled day to day include certificate of origin applications, commercial invoices, packing lists, and production cost records. Certificates of origin work is updated per order, so knowledge-base content changes as each order advances. Copy drafting draws citable wording from these materials for product descriptions and customer communication text. The materials sit across the Single Window, CCPIT systems, enterprise production records, and customer clearance requirements; retrieval scope and permission scope need separate checking.
Constraints at the retrieval step
The knowledge base search node can associate one or more libraries that use the same vector model. Libraries with different vector models cannot be associated together. Retrieval searches the whole library; a collection only classifies data and does not affect search results. Quoted content is output as an array whose length can be 0, so the downstream chain still runs when nothing is retrieved. The minimum relevance score takes effect only in semantic retrieval or when result reranking is used; it is a filter threshold and does not perform permission or entity isolation. Hybrid retrieval merges multiple result paths through RRF, which is a fusion process rather than a separate switch. Image retrieval requires image input and matching model capability, and reranking requires a model and must be enabled by configuration. Optional paths shown in the overall flow diagram do not mean every request executes all of them.
Hypothetical paper exercise sample: an enterprise holds a production cost record whose original text reads, "This batch of plastic lunch boxes was molded and assembled by this factory's injection workshop in March 2026; the resin pellets were purchased from a domestic supplier, and the purchase invoice number and warehouse receipt are in the attachment." The draft sentence under review reads, "All processes for this product are completed domestically, so it meets origin qualification." That sentence concerns process scope and an origin determination. The record states only the two processes of molding and assembly plus the source of raw material; it does not state a conclusion on the applicable origin rule. The check compares the process scope in the draft sentence against the processes recorded in the material, and marks the parts the material does not cover as pending verification.
Configuration and implementation checks
| Configuration item | Hypothetical trial starting point | Reason and comparison object |
|---|---|---|
| Associated knowledge base | Associate one library containing certificate of origin applications and production cost records | Two libraries can be associated only when their vector model identifiers match; check the identifiers first |
| Search mode | Test hybrid retrieval first | Compare recalled content for the same test question against semantic retrieval and full-text retrieval separately |
| Quoted content limit | Set to a token amount covering one complete production cost record | Compare with a shorter packing list record and observe whether content is truncated |
| Minimum relevance score | Start with a lower value | Compare with a higher value and observe whether irrelevant fragments are introduced |
| Question optimization | Enable for follow-up questions containing references | Compare the original question with the optimized question and check whether the subject was altered |
| Result reranking | Enable by configuration when candidates are numerous | Compare the ranking positions of the same candidate set before and after enabling |
These values are hypothetical trial starting points, not official defaults.
Three common errors
- Treating the minimum relevance score as a permission filter. A relevance score reflects only how close content is to the question; it does not distinguish business ownership. To check, input a question about an unrelated enterprise and observe whether returned content can still include another entity's material; permission isolation requires a separate system implementation.
- Treating the draft sentence as already supported by the material. In the sample, the draft sentence says "all processes are completed domestically," while the record states only molding and assembly. To check, compare the process list item by item and mark processes the material does not state as pending verification, not as a denial.
- Treating RRF as a switch that can be turned on. RRF is the fusion process for hybrid retrieval results, and no corresponding switch exists in configuration. To check, confirm the search mode and reranking settings and observe changes in the ordering of quoted content after fusion.
How to verify the setup
- Input the production cost record text and the draft sentence from the sample, and compare the process scope in the draft sentence against the process scope stated in the material. If the material does not cover all processes, the output should retain a pending-verification marker; if the output directly concludes that origin qualification is met, the condition is not satisfied.
- Input a follow-up question containing a reference, and compare the retrieval terms before and after question optimization. If the subject is replaced with another enterprise or product after optimization, the condition is not satisfied; a consistent subject satisfies it.
- Input one packing list record and one production cost record, and compare the completeness of returned content under the quoted content limit. If the longer record is truncated so that key process information is missing, the limit needs adjustment; complete return of both records satisfies the condition. For the empty-result case, a clearly defined paper input of an empty array can be used to check the downstream handling design, and this does not support inferring that retrieval rules necessarily return empty.