use value for disk partitioning to reuse only Linux partitions

I'm looking for the actual value that goes between <use></use> when listing out my partitions that says "Use only the existing Linux partitions". I'm pretty sure it exists given that the documentation talks about it, however I haven't seen the value listed. -- Jesse Keating RHCE Pogo Linux -- Linux Systems Engineer tel: (888) 828-7646 ex: 436