The document discusses data centric composites (mashups) in SharePoint 2010. It provides an overview of composites and mashups, explaining that composites assemble prebuilt components to deliver enterprise solutions instead of building from scratch. It describes mashups as combining data or functionality from multiple external sources. The document outlines how Business Connectivity Services can be used to leverage external enterprise data in SharePoint and Office applications by creating reusable connections and custom solutions. It provides examples of how external content types integrate data into SharePoint and Office and details which tools different users can use to work with external data.