The document discusses integrating aspect-oriented programming (AOP) concepts with the OSGi module system for Java. It describes how the Equinox Aspects project enables aspects to be modularized into OSGi bundles like any other code. This allows aspects to be installed, uninstalled, and updated dynamically at runtime. It also demonstrates how AOP can be used within bundles and across bundle boundaries using load-time weaving powered by the AspectJ compiler.