Output Driver

The OUTPUT_DRIVER specifies the rendering engine used.

Consider this excerpt from the Genero Application Server configuration file:
...
<WEB_APPLICATION_RENDERING_COMPONENT Id="cpn.rendering.gwc2html5">
  <OUTPUT_DRIVER>GWC2</OUTPUT_DRIVER>
  <XML_DECLARATION>TRUE</XML_DECLARATION>
  <HTTP_REQUEST_ENCODING Source="REQUEST"/>
  <HTTP_RESPONSE_ENCODING Source="REQUEST"/>
  <MIME_TYPE>text/html</MIME_TYPE>
</WEB_APPLICATION_RENDERING_COMPONENT>
...

For the Genero Web Client, the output driver is GWC2, which means the Snippet-Based Rendering Engine (SBRE) is used.