There are three techniques for data-based change data capture, namely:

The source system populates specific data elements.

Application automated interfaces

The source system processes copy data that has changed into a separate object as part of the transaction, which is then used for the extract process.

The source systems send binary code through ASCI that makes the process rapid.

The source system processes add to a simple list of objects and identifiers when changing data, which is then used to control selection of data extraction.

None of the above