This document summarizes a presentation about aggregating and linking data from various sources about World War 1. It discusses creating APIs to expose data from different institutions, using formats like SOLR, RSS, and OAI-PMH. It also describes efforts to link related data across sources using Linked Data principles and forming a discovery layer to make the aggregated content more discoverable to people and machines. Challenges discussed include varying data formats, lack of certain content types, and non-open licenses.