When you create the structure of a topic, you define the data structure on the publication repository to where the publications that are associated with the topic publish data, and from where subscribers to the topic consume the data. The topic structure can consist of multiple tables.
When you create a topic,
Cloud Integration Hub
generates the tables in the publication repository where it retains the data that is published for the topic.
Cloud Integration Hub
uses the data structure for the publications and subscriptions that are associated with the topic.