When you define certain Java CAPS components, one or more activity is added to that component in the Project Explorer. You cannot drag and drop a Java CAPS component, such as a Collaboration or OTD, directly into a BP. Instead, you drag and drop an activity defined by the component into the BP. For example, when you create a Java Collaboration Definition or OTD, activities are added to the Collaboration node in Project Explorer. Activities appear as yellow rectangles, similar to the Business Process Designer activity icons.