Below my comments in bold
Can we use/invoke the web service in OBIEE 11g?If yes,please provide me details.
Yes we can Invoke
If we install OBIEE 11g ,can we get the BI publisher as free product or do i need to configure anything?
Yes we will get
Can i use the Webservices with BI publisher?If yes,then what is the difference between OBIEE 11g usage and BI publisher usage?
No we cannot use webservices with BI Publisher.We can only use webservices in OBIEE/Analytics
Btw what is your requirement?
I want to consume DB by using web services and has to build the report .Another is to writeback the reports to DB either by Web service or Writeback from OBIEE.
I am trying to get acces the BI publisher in my environment i am getting error.Is there any configuration changes required to enable BI publisher?
I see in google that we can invoke web services from BI publisher.How can i confirm the same?