PROS 99/007 S4 VERS Long Term Preservation Formats Specification outlines the long-term preservation formats that will be accepted by Public Record Office Victoria (PROV).

A key digital preservation risk is that a file format will become obsolete, and files in that format will not be able to be opened by future computer systems. If this happens the information in that file is effectively lost. PROV manages this risk by requiring records to be in long term preservation formats that are unlikely to become obsolete for a very long period of time, and when they do become obsolete are expected to be easily migrated to newer formats.