This book constitutes the thoroughly refereed proceedings
of the Fourth International Conference on Data Technologies and Applications,
DATA 2015, held in Colmar, France, in July 2015.

The 9 revised full papers were carefully reviewed and
selected from 70 submissions. The papers deal with the following topics:
databases, data warehousing, data mining, data management, data security,
knowledge and information systems and technologies; advanced application of
data.