AIR / Flex and XSLT

Hi

I'm on the way to build my first Air App, using Flex 3.2. and planned also to use Switchboard.

I built my simple GUI and would like to Transform a Selected XML-Document with a selected XSLT FIle.

Is there a built in XSLT-Processor, or am I able to execute an external XSLT-Processor?

Thanks
Stefan