Symbolic Name uniqness

[Mahammad Nasir]

Hi All,
 
I am bit confused about uniquness of bundle symbolic name.
 
What is unque in OSGI is that bundle name or Bundle symbolic name.? This
means, i have to change the symbolic name or bundle name if i have to load
same bundle with different version?
 
Basically i wanted to know what is unique is OSGI and How it is guaranteed
in case of same bundle with diffrent version is loaded?
 
Or is that BundleName + Version is Unique?
 
 
Nasir