On Fri, Sep 14, 2012 at 2:59 AM, Mike Lischke <mike at lischke-online.de>wrote: > keyword: > keyword_sp > ( > | ASCII_SYMBOL > I noted that the options in parenthesis start with '|', which means that the empty sequence is one of the options. I've been bit by that many times. -- Juancarlo *Añez*