File revisions, set aside when the old version obsolete documents by documents control centre "database" file on the original old version invalid or void by "issue" items to "obsolete" area.
File revisions obsolete when older files by the failure of the original document control center failure or obsolete legacy of the file from "outstanding" items to "obsolete" in the region "file repository."
When the revised document, invalid, the old version of the failure of the file from the file in the "file control center database files will be invalid or void by the original version of" issued "project to the" obsolete "area.