A key source of revenue for the media and entertainment domain is ad targeting: serving advertisements to a select set of visitors based on various captured visitor traits.  ...  Usage of Semantic Web technologies enables a decentralized approach where federated querying allows local companies to combine their captured visitor traits, and better target visitors, without aggregating  ...  Federating Advertisement Targeting with Linked Data EcoDaLo aims to improve ad targeting by combining visitor data across publishers.  ...