There are few dirs and files not available in docs.tar with promoted build but are available online at http://download.java.net/jdk7/docs

For example, go to http://download.java.net/jdk7/docs/platform

It has two extra dirs as rmi and seriliazation but these dirs are not available at /java/re/jdk/7/promoted/all/b139/bundles/solaris-sparc/jdk-7-ea-apidocs.tar