Currently, it is not easy to define what are the parameters of a chain.
In fact, currently a chain can only retrieve values from the Automation Context.
This means that the parameters of operations should be :
- wired via MVEL to context variables
- not required (and fetch data from the context from Operation code)
This means that there is no clear interface about what are the parameters of a chain : this is not good.
We could expose the parameters of each Chain as a Nuxeo Schema structure so that Layout binding will be easy.