The CS specifies an isPartial flag for results. It states in 8.3.2.1 that "In single job as well as in continuous operation, the system can produce an arbitrary number of results, all of them partial with the exception of the last one."
It does not specify whether the total result shall or may include the contents of all preceding partial results.
It does also not specify - although that is apparently implied - that all these results must have different resultIds but share the same jobId.