Within the data hub, there are different definitions of the data to map the data coming from different source systems and to retrieve the data. Each source system is represented by a different file within the Data Hub's schema For Insight Hub, there are three systems:
- default - the default definitions match the Insight hub schema exactly.
- load - the load definitions include the logic to map the Insight messages to the schema. This extends the default source system.
- search - used to run searches and retrieve data from the system
With the exception of the instance table itself, all the loads are sent to the load definitions.
The load source system defines a set of source entities. These allow processing options to be added to the sourcing process, particularly message readers which interpret the incoming data. These are described in Document load and Event load.