dtd_src(){
message dtd_src $1 $2 &&
mkdir $SOURCE_DIRECTORY/$1     &&
cd $SOURCE_DIRECTORY/$1        &&
unpack_file $2
}


mk_source_dir $SOURCE_DIRECTORY &&
dtd_src 4.5 ''   &&
dtd_src 4.1.2 2  &&
dtd_src 4.2 3    &&
dtd_src 4.3 4    &&
dtd_src 4.4 5

