$ ROOT = F$PARSE(P1,"[]A.;0",,,"SYNTAX_ONLY,NO_CONCEAL") - "A.;0"
$ ROOT_DEV = F$PARSE(ROOT,,,"DEVICE","SYNTAX_ONLY")
$ ROOT_DIR = F$PARSE(ROOT,,,"DIRECTORY","SYNTAX_ONLY") -
$ ROOT = F$PARSE(P1,"[]A.;0",,,"SYNTAX_ONLY,NO_CONCEAL") - "A.;0"
$ ROOT_DEV = F$PARSE(ROOT,,,"DEVICE","SYNTAX_ONLY")
$ ROOT_DIR = F$PARSE(ROOT,,,"DIRECTORY","SYNTAX_ONLY") -