Integration with Drools rule engine

[Ajai]

Hi,

We are in the process of evaluating a Workflow engine that can be integrated with Drools rule engine. Can Enhydra shark be integrated with Drools rule engine.

Also please tell us the following features are available:

1. versioning of process definition
2. Can web service act as a input
3. Can  Web service be actor in process
4. Process steps can be assigned to Roles, and User in Roles
5. Authorization mechanism.
6. Creating a sub flow from a main flow.

Please let us know the inputs.

Thanks in advance

Regards
Ajai G