Issue in ./help/datastreams/configure.md
On the Adobe Analytics Service for the Visitor ID namespace it states:
"(Optional) The namespace you want to use for the Adobe Analytics visitorID. When you send an event with a value specified for this namespace, it will be automatically used as the visitorID in Analytics."
But there is no written confirmation that the Service defaults to ECID when this field is empty.
Additionally, there is no information on if the field is filled with a custom namespace and a request with an undefined namespace: will it default to ECID or will it be null/empty?