There are two approaches for determining the incremental
difference between acquisitions from a data source: you can either let the
Content Acquisition System determine the incremental difference, or you can
implement the
IncrementalDataSourceRuntime interface to determine the
incremental difference.
If you are accessing a data source that tracks content revisions, it can
be more efficient to implement
IncrementalDataSourceRuntime and calculate the changes
in your data source extension, rather than have the Content Acquisition System
determine the changes for you.
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