What does the "Archive" button do?

Hello All,

This is what I would like to do..

I have a clean model of a current project. I would like to check it in to the vault, thats the easy part.

The second part is Archiving all the old parts and files that are already in the vault. I seen the Archive button in the PDM admin tools and was wondering what does it do.

-Thanks for all the help.

SolidworksWorkgroup Pdm