up X expl

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/correg@769 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
up XF expl

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/correg@770 edb9625f-4e0d-4859-8d74-9fd3b1da38cb