Lukas, yes, I think it's not so hard to use prefixes already used in the project. And we can use default ones if there is no any page with these libraries.
I don't think we should create one more preference for that. Let's just use most used prefixes.

This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators.
For more information on JIRA, see: http://www.atlassian.com/software/jira