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A concrete example for this type of aggregation is the production of aggregated API docs or other assembly-like output that should be attached to a project and installed/deployed alongside the main artifact. An aggregated site with summary reports is another example.
Scope for Aggregation
Orthogonal to the scenarios outlined above, we have to distinguish what part of a reactor build should be subject to aggregation. Consider the following multi-module hierarchy where the projects marked with (X) associate an aggregating mojo with their lifecycle:
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