An example of KeptPages. Say we are editing a page that was last edited in 1997, with an expiry timespan of one week:

''Before''

: '''<nowiki>SamplePage</nowiki>'''
: This is content from 1997.

: '''Revision history.'''
: empty.

''After edit 1 at 3:43pm March 21, 2001''

: '''<nowiki>SamplePage</nowiki>'''
: This is content from March 21, 2001.

: '''Revision history.'''
: [3:43pm March 21, 2001] This is content from 1997.

''After edit 2 at 1:42am March 23, 2001''

: '''<nowiki>SamplePage</nowiki>'''
: This is content from March 23, 2001.

: '''Revision history.'''
: [1:42am March 23, 2001] This is content from March 21, 2001.
: [3:43pm March 21, 2001] This is content from 1997.

''After edit 3 at 7:02pm March 29, 2001''

: '''<nowiki>SamplePage</nowiki>'''
: This is content from March 29, 2001.

: '''Revision history.'''
: [7:02pm March 29, 2001] This is content from March 23, 2001.
: [1:42am March 23, 2001] This is content from March 21, 2001.

:: Note that "This is content from 1997." has now expired.

''Assuming no more edits, after 7:02pm, April 5, 2001''

: '''<nowiki>SamplePage</nowiki>'''
: This is content from March 29, 2001.

: '''Revision history.'''
: empty.

----

In practice, it's best to leave at least one version behind for purposes of diffs, so at the end, we will have:

: '''<nowiki>SamplePage</nowiki>'''
: This is content from March 29, 2001.

: '''Revision history.'''
: [7:02pm March 29, 2001] This is content from March 23, 2001.