Placeholder

An inline element that displays the value of a metadata property directly in content. This allows content (text, date or datetime) to be edited in one location, but shown in multiple. Because the property can belong to the publication, the same component can display different content in different publications. 

Also, the creation and resolution of placeholders are accessible to anyone that has permission to edit the document.  Both can be dynamically created, populated and resolved by users with no need to modify the document template.