Sap B1 DI Server license information

Hi,

I have installed DI Server on SAP B1 server and want to try B1 web services examples.I have done the required setup on server like web services and IIS server.I want to know does DI Server requires separate license because in sap license I do not have license type DI Server.So how can I get trial DI server license?Also does 30 days trial version of sap b1 server tools has trial license for DI Server?

Thanks.