asier to correlate spans in different traces.</p><p>Required.</p></td><td>No</td></tr><tr id=Template-start_time><td><code>startTime</code></td><td><code><a href=/v1.6/zh/docs/reference/config/policy-and-telemetry/istio.policy.v1beta1.html#TimeStamp>TimeStamp</a></code></td><td><p>The start time of the span.</p><p>Required.</p></td><td>No</td></tr><tr id=Template-end_time><td><code>endTime</code></td><td><code><a href=/v1.6/zh/docs/reference/config/policy-and-telemetry/istio.policy.v1beta1.html#TimeStamp>Ti