This book constitutes the refereed proceedings of the
Second International Conference on Data Science, ICDS 2015, held in Sydney,
Australia, during August 8-9, 2015.

The 19 revised full papers and 5 short papers presented
were carefully reviewed and selected from 31 submissions. The papers focus on
the following topics: mathematical issues in data science, big data issues and
applications, data quality and data preparation, data-driven scientific
research, evaluation and measurement in data service, big data mining and
knowledge management, case study of data science, social impacts of data
science.