The xml::filter::saxt module is like the unix 'tee' command in that it multiplexes the input stream to several output streams. in this case, the input stream is a perlsax event producer (like xml::parser::perlsax) and the output streams are perlsax handlers or filters.

the saxt constructor takes a list of hash references. each hash specifies an output handler. the hash keys can be: documenthandler, dtdhandler, entityresolver or handler, where handler is a combination of the previous three and acts as the default handler. e.g. if documenthandler is not specified, it will try to use handler.