p:add-xml-base with relative=true

Does the add-xml-base step every *change* existing xml:base attributes?
For example, does it change their values to be relative or absolute
according to the setting of the relative option?

                                        Be seeing you,
                                          norm

-- 
Norman Walsh <ndw@nwalsh.com> | Do not try to live forever. You will
http://nwalsh.com/            | not succeed.--George Bernard Shaw