private function workspace_toxml(Project $ws, $activeProjects)
 {
     $parentIds = '';
     $i = 1;
     $pid = $ws->getPID($i);
     while ($pid != $ws->getId() && $pid != 0 && $i <= 10) {
         $coma = $parentIds == '' ? '' : ',';
         if (in_array($pid, $activeProjects)) {
             $parentIds .= $coma . $pid;
         }
         $i++;
         $pid = $ws->getPID($i);
     }
     $this->instance->startElement('workspace');
     $this->instance->startElement('id');
     $this->instance->text($ws->getId());
     $this->instance->endElement();
     $this->instance->startElement('name');
     $this->instance->text($ws->getName());
     $this->instance->endElement();
     $this->instance->startElement('description');
     $this->instance->text($ws->getDescription());
     $this->instance->endElement();
     $this->instance->startElement('parentids');
     $this->instance->text($parentIds);
     $this->instance->endElement();
     $this->instance->endElement();
 }