Represents a collection of updates. The name of the collection of updates. The url of the zip file containing the updates. This does not need to be specified if the bundle is inside a bundle.xml file inside a zip file. If used on a center.xml, it can be a relative or absolute URL. The location to install the bundle. Only one value is currently supported, "${oracle.home}". If not specified, the bundle will be installed into the extensions directory. Represents a single update. Whether this update is a patch or an extension.