Job Descriptions in Job Library

Summary

Does every job description in the Job Library have to be assigned a requisition #?

Content

I want to set up my Job Library with just job descriptions as the other fields will vary by requisition.  But what I don't want, is a requisition number assigned to every job description I set up as I don't want approx 500 "open" requisitions clogging up my recruiters reports.  Is there a way to NOT assign a requisition number to a template?