Spark ML DAG Pipelines

Hi Spark Experts, Can someone point me to some examples for non-linear (DAG) ML pipelines. That would be of great help. Thanks much in advance -Srikanth

DAG Pipelines?

I read on the ml-guide page ( http://spark.apache.org/docs/latest/ml-guide.html#details). It mention that it is possible to construct DAG Pipelines. Unfortunately there is no example to explain under which use case this may be useful. *Can someone give me an example or use case where