translate-chars(from,to,node?)
Remap characters in the text contained in specified node and all its descendants. Parameter node defaults to the context node.
A character found in string from is replaced by the character at the corresponding position in string to. If there is a character in string from with no character at a corresponding position in string to (because string from is longer than string to), then the occurrences of that character are removed.
Examples:
translate-chars("/", "\");
translate-chars(" -.", "_");
translate-chars(" ", " ", $title);