For publications that trigger a Data Integration task, mapping is the data mapping between the publishing source and the Cloud Integration Hub publication repository.
A publication runs a Data Integration task that reads from the source and publishes to the topic tables. Task targets must include at least one of the topic tables, and must not include any target table that is not defined in the topic.
You create the task in Data Integration and then select it when you create the publication in Cloud Integration Hub. Cloud Integration Hub uses an Informatica Intelligent Cloud Services REST API to trigger the task, and the Cloud Integration Hub cloud connector writes the published data to Cloud Integration Hub.