Abstract: Systems and corresponding methods are provided for determining when a content page contains out of date content items as a result of changes made to the content items, which systems comprises a template engine operative to generate a content page comprising content items that are associated with time stamp information to indicate the last time the content item was modified. One or more dependency records are generated to store information regarding the relationship between content items that comprise the content page and the content items stored in the data source, which is compared with time stamp information contained in the data source for each content item, to determine through the comparison those content pages that contain content items that have been modified in the data source, and to instruct the template engine to re-generate the content page.