PI DataLink 3.x begins using the PI-SDK instead of the PI-API. With the use of the PI-SDK, many new features are introduced. For instance, PI DataLink 3.x calculation capabilities have been enhanced to include filtered summaries and expression summaries. In addition, the new tag search will enable users to search for tags using their alias. PI DataLink 3.x also supports retrieving tag attributes from tags of other point classes other than classic.