JDT Core (org.eclipse.jdt.core) is the plug-in that defines the core Java elements and API. You should always list this plug-in as a prerequisite when you are developing Java specific features.
JDT Core packages give you access to the Java model objects and headless Java IDE infrastructure. The JDT Core packages include:
Manipulation of the structure of a compilation unit should be done using org.eclipse.jdt.core.dom
instead of org.eclipse.jdt.core.jdom
.
org.eclipse.jdt.core.jdom
will be deprecated in the 2.2. stream and replaced with org.eclipse.jdt.core.dom
.