Twarql: Twitter Feeds through SPARQL

Introduction

Our approach encompasses the following steps:

extract content (entity mentions, hashtags and URLs) from microposts;
encode content in a structured format (RDF) using shared vocabularies (FOAF, SIOC, MOAT, etc.);
enable structured querying of microposts (SPARQL);
enable subscription to a stream of microposts that match a given query (Concept Feeds);
enable scalable real-time delivery of streaming data (SparqlPuSH).