The assumption to challenge
Treating every new file version as a new business event confuses evidence with the thing it describes. Consider an already approved supplier renewal: someone corrects its filename and uploads the same signed contract again. The feed has a legitimate file event. It has no evidence of another renewal. Even a changed timestamp cannot establish a new approval or obligation.
Name the business claim
A document becoming available changes access. Availability alone does not establish approval, effectiveness, or a change in price. Define the business event as a particular transition, such as approval of a revised contract price. Compare the relevant business fields with the last verified state, and check the evidence for authorization. Keep the upload time separate from the effective date; they answer different questions. A useful feed can report a file upload immediately while leaving the business interpretation pending.
Run a practical check
Start with a known, approved contract and prepare three examples: an identical reupload, a timestamp refresh, and an approved amendment that changes the agreed price. Write the expected business interpretation before inspecting the feed. The first two should produce no new price approval; the third should identify the approved price and its effective date. Trace each conclusion to the document and approval evidence. These examples are illustrative, not reported test results.
Hypothetical boundary: publication activates a tariff
Imagine an internal service with an explicit rule: a tariff becomes active when an authorized operator publishes it to one designated page. Publication can then be the business event. Classify it that way only when the location, authorization, and transition from the previous active tariff are verified. An identical republication leaves the active tariff unchanged. If a required condition is unknown, retain the file observation and mark the business interpretation as pending. The deciding factor is the service's rule and supporting evidence.