What the documents look like
Parcel labels and carrier handoffs sit at the point where a parcel leaves the warehouse. The operational center of gravity is the carrier scan that assigns responsibility for the parcel. The main data sources for this category are the courier system, WMS shipment records, the GB/T express service standard, and carrier billing. The documents handled day to day are electronic waybills, handoff lists, pickup scan records, and exception item registers.
In cross-border material and multilingual retrieval, one handoff batch can carry a Chinese waybill, a foreign-language handoff list, and multilingual pickup scan records at the same time. Each retrieved item needs to be traced back to its source text. Updates occur per batch and daily, so citation and traceability checks are organized by batch and by date range.
Constraints at the citation tracing step
The knowledge base search node can associate one or more knowledge bases that share the same vector model. Its output is an array of citations, and the array length can be zero. An empty array means no content was retrieved; the downstream output path still runs, and this does not mean the workflow terminated with an error.
Semantic retrieval supports cross-language understanding, so a Chinese question can match a foreign-language knowledge point. Hybrid retrieval merges multiple result paths through RRF. Rerank produces a 0-1 score that can be used for filtering. The minimum relevance value is a filter threshold and takes effect only in semantic retrieval or when result reranking is used; it does not perform permission or entity isolation. The same-vector-model requirement for associated knowledge bases does not extend to external systems such as business registration sites.
Hypothetical drill sample: on 10 March 2025, a warehouse shipping team processes a batch of parcels bound for a German station. The objects are waybill numbers DE-0310-001 through DE-0310-050. The handoff list states: "This batch contains 50 items, picked up by site A, handoff status pending pickup scan." The pickup scan record states: "DE-0310-001 through DE-0310-030 scanned; the remainder not scanned." The exception register states: "DE-0310-045 outer packaging damaged, pending confirmation." A draft sentence awaiting judgment reads: "All 50 items in this batch have completed pickup scan, so the handoff can be confirmed as complete." The draft sentence does not match the scan record in subject, period, or field scope. The scan record covers only the first 30 items, while the draft sentence claims all items are complete. The claim is unsupported.
Configuration and implementation checks
The table below lists configuration checkpoints for this hypothetical trial starting point. The values are comparison starting points for this exercise, not official defaults.
| Configuration item | Hypothetical starting point | How to check |
|---|---|---|
| Associated knowledge bases | Select the three ingested libraries for waybills, handoff lists, and scan records | Confirm vector model identifiers match before associating them together |
| Search mode | Hybrid retrieval | Observe semantic and full-text recall results together, merged through RRF |
| Citation limit | Set by tokens, using a smaller value in this exercise | Compare against scan record source length to confirm key fields are not truncated |
| Minimum relevance | A lower value in this exercise | Compare against rerank scores to observe whether valid source text is filtered out |
| Question optimization | Enabled in this exercise | Compare against the current question text to observe whether completion changes the subject |
| Citation output handling | Check each answer against cited source text item by item | Use a paper input of [] to check downstream design for empty results |
Three common errors
- Treating a retrieval result as an authorization basis. Retrieving a "pending pickup scan" record does not establish that the handoff is complete. A pending review status does not demonstrate that an operating permission is absent, and it does not equal approval.
- Associating knowledge bases across different vector models. When two knowledge base vector model identifiers differ, attempting to associate them together introduces vector results that cannot be compared. Check the identifiers, exclude those that do not match, and record the actual observation.
- Confusing field scope. The draft sentence claims "all items complete," while the scan record covers only the first 30 items. The subject and field scope do not match, so the claim is unsupported. It cannot be judged as a contradiction or a negation.
How to verify the setup
- Input the scan record source text and the draft sentence from the hypothetical sample. Compare their subject, period, and field scope, and observe whether the draft sentence exceeds the coverage of the scan record. If it exceeds that coverage, mark it as unsupported.
- Input a paper empty result []. Compare whether the downstream answer step continues through the empty array, and observe whether an error termination appears. Do not claim that a fictional rule retrieval necessarily returns [].
- Input two knowledge bases whose vector model identifiers differ. Compare whether the identifiers match, and observe whether they are excluded. Do not run cross-model retrieval to compare missed recall; only check identifiers and record the actual observation.