$ 'THIS_IS_$2BALSO$2B$2EPATHWORKS.TXT'     should look like     'this_is_+also+.pathworks'     in a directory listing, and   " 'this_is_%2balso%2b.pathworks.txt'  +   as a URL reference, mapping rule required   ' pass /pwk/* /ht_root/exercise/* ods=pwk 