Common Workflow Language
..is an emerging standard for computational workflows with a focus on bioinformatics command line tools using Docker.
The semantics of CWL are inspired by Taverna's SCUFL2 model and the Wf4Ever wfdesc vocabulary.
A good first approximation for integration of CWL for Taverna would be to parse/read CWL workflows into the SCUFL2 model of Taverna Language.
Running CWL workflows can be achieved by interpreting CWL Tools (which are described in JSON) as a way to configure the Tool Activity with docker commands.
But this SCUFL2 reader can just represent the CWL configurations as-is.
There's an early Java SDK for CWL parsing just made, under development at https://github.com/common-workflow-language/cwljava/