Turn on/off the option to display labels instead of URIs.
When this option is turned on, then labels for resources will be displayed instead of the full URI of a resource. This makes it simpler to create friendly diagrams that non-technical people can understand.
This option is turned off by default.
bool $useLabels A boolean value to turn labels on and off:
object EasyRdf_Serialiser_GraphViz
public function setUseLabels($useLabels) {
$this->useLabels = $useLabels;
return $this;
}