Why can’t I find a specific update on the WebDewey Deutsch update page?

DDC Deutsch has been regularly updated since it was first translated (2005). Before the switch to WebDewey Deutsch in 2012, DDC changes were documented using a different workflow. This means that changes documented before 2012 cannot be retrieved on the WebDewey Deutsch update page. However, WebDewey Deutsch contains an archive file which incorporates the change information that pre-dates 2012.