<?php namespace Moserware\Skills\FactorGraphs; require_once(dirname(__FILE__) . "/VariableFactory.php"); class FactorGraph { private $_variableFactory; public function &getVariableFactory() { $factory = &$this->_variableFactory; return $factory; } public function setVariableFactory(VariableFactory &$factory) { $this->_variableFactory = &$factory; } } ?>