1. If an editor complains of a missing document provider, install an instance of TextFileDocumentProvider with the setDocumentProvider() method on the editor.
2. An IResourceProxy is used by a builder to provide a wrapper around an IResource, but which doesn't require the construction of an IResource image.
3. An IPath is a generic file component that is used to navigate files in folders and projects.
4. A nature is a flavor of a project that enables certain behaviors. It is installed with an update to the project descriptor for the given project.
5. Markers are generally created by a builder—though they can be created by any plug-in on a resource. There is a specific function on the resource that can be used to create a marker of a specific type.