Revision control 
In Foswiki, assuming appropriate 
AccessControls, anyone can change anything but those changes are logged.  There is a complete audit trail with record of: 
-  Version
-  Date of last revision
-  Person who made change
 
The default 
PatternSkin offers access to previous versions using the 
History link in the footer of any viewed topic. Differences between revisions can also be reviewed by clicking on the 
> symbols located between the revision numbers depicting the versions available.
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