Figure 1
From: Structuring an event ontology for disease outbreak detection
An overview of the BioCaster disease surveillance system. The system downloads news articles from online news feeds every few hours and filters out irrelevant topics. On the filtered articles, mentions to important concepts (disease cases, pathogens, time, location, etc) are recognized, and structured event information will then be retrieved. The information will be translated into other languages if necessary, and ranked according to its urgency and seriousness.