%h =(
      aid=>'6077',
      6077.1=>{pii=>"aaaa",
               pit=>"bbbb",
               doi=>"cccc",
              },
      abc=>'asdf',
      );

#I need to append values as follows

$h{6077.1} = { pii=>"aaaa",
               pit=>"bbbb",
               doi=>"cccc",
               xmltype=>'000',
               weight=>'111',
               }