Enumeration DataSource
Enumeration Members
UNSPECIFIED
UNSPECIFIED: 0
Read by the service as DataSource.AGENT.
USER
USER: 1
A human said it, or corrected what the agent had.
AGENT
AGENT: 2
The agent worked it out itself. The SDK's default.
Who produced a piece of content.
The operator source is deliberately absent: it is written only by the memory operators and is not a value a caller may claim.