public function getAllKnown()
 {
     $allDoctypes = array();
     foreach ($this->knownMatrix as $category => $instances) {
         foreach ($instances as $instance) {
             $parentCategory = $category;
             $key = $parentCategory . '-' . str_replace('.', '', $instance['version']);
             $module = null;
             $generator = new Generator();
             if ($this->multiline === true) {
                 $generator->multiline();
             }
             if ($this->noUri === true) {
                 $generator->noUri();
             }
             if ($this->lowercasePrefix === true) {
                 $generator->lowercasePrefix();
             }
             if ($this->lowercaseFpi === true) {
                 $generator->lowercaseFpi();
             }
             if ($this->uppercaseFpi === true) {
                 $generator->uppercaseFpi();
             }
             if ($this->isModuleCategory($parentCategory)) {
                 $module = $this->getModuleFromCategory($parentCategory);
                 $parentCategory = $this->getParentCategoryFromModuleCategory($parentCategory);
             }
             $generator->{$parentCategory}();
             $generator->version($instance['version']);
             if (!is_null($module)) {
                 $generator->module($module);
             }
             if (isset($instance['variant'])) {
                 $key .= '-' . $instance['variant'];
                 $generator->variant($instance['variant']);
             }
             if (isset($instance['moduleVersion'])) {
                 $key .= '-' . str_replace('.', '', $instance['moduleVersion']);
                 $generator->moduleVersion($instance['moduleVersion']);
             }
             $allDoctypes[$key] = $generator->generate();
         }
     }
     return $allDoctypes;
 }