!!! Overview[1]
[{$pagename}] is an [Attribute] found in the [RootDSE] which specifies the change number for the oldest change in the [changelog]. 

Most changelog [implementations|LDAP Server Implementations] offer some kind of purging mechanism to prevent it from growing without bound, so this value may change over time.

!! More Information
There might be more information for this subject on one of the following:
[{ReferringPagesPlugin before='*' after='\n' }]
----
* [#1] - [DIT and the LDAP Root DSE|https://www.ldap.com/the-directory-information-tree/|target='_blank'] - based on information obtained 2016-04-22