Oracle Dataguard and SAP licensing policy

Hi Gurus

We are planning to setup Disaster Recovery site using oracle 11g dataguard.

Would it be possible you to answer following queries?

1) Is oracle dataguard is part of Oracle DVD set provided or downloaded from SAP?

2) Do we need to procure license for oracle datagueard additionally from SAP?

3) would it be possible to provide me any note number?

Thanks and Regards

Upendra