pear::soap array return problem

Sorry, I'm new here and saw that there wasn't archives for the group... so accept my apologies if this has been covered before. I'm building a Webservice with PEAR::SOAP and need to be able to return an unknown number of a particular result. So far I have this in my Class: $this->__typedef['{http://lifesci.ibsb.arizona.edu/}publication'] =

                  array('authors' => 'string',
        		'pub_date'=> 'string',
        		'title'	=> 'string',
        		'source'=> 'string',
        		'volume'=> 'string',
        		'pages'=> 'string'
                         );

$this->__dispatch_map['getPubs'] = array('in' => array('netid' => 'string', 'publimit' => 'int'), 'out' => array( 'publications' => '{http://lifesci.ibsb.arizona.edu/}publications' )); The problem is, I'm not sure how many publications will be returned from the getPubs() method. Any tips on I can handle this? Thanks.