Publications and Open Material

26Apr '16

Measures for assessing the data freshness in Open Data portals

Authors Sebastian Neumaier and Jürgen Umbrich, Vienna University of Economics and Business, Vienna, Austria

Abstract: Many applications and use cases which consume Open Data rely on up-to-date information. However, scarcely any major Open Data portal provides the users with tangible on how current the data sources are. In order to create a freshness metrics that would solve the mentioned issues, we need to i) learn the change history of a data source and ii) apply a heuristic to estimate how up-to-date a data source is. The following paper assesses which information about the change behaviour of a data source in an Open Data portal are available to derive such a change history.