Update workflows

pages/Workflows.md

@@ -13,5 +13,13 @@ Language (CWL) is currently being evaluated as an abstraction layer to describe
 analysis workflows and tools. It provides scalability and portability across
 many different software and hardware environments.
 
-- dirac
-- CWL + dirac 
+The second layer of workflow management targets the distributed processing of
+data over heterogeneous computing infrastructures. For this purpose, the DIRAC
+(http://diracgrid.org/) interware has been chosen which provides a common
+interface to a multitude of resource provides like grids, cloud systems and
+clusters of computers, in a seamless manner, offering great interoperability.
+DIRAC will be used to set up a data driven processing infrastructure for all
+stages in the pipelines including the mangling of raw data and Monte Carlo
+simulations.
+
+The combination of CWL and DIRAC leaves TODO