We now live largely in a data-driven world, and ethical oversight and constraints are needed to be sure that data ethics can reach an appropriate balance between the risks and benefits of data technology. The goal is to control the risk, but to allow enough risk to make it possible to take advantage of any potential benefits of data technologies now or in the future. A comprehensive perspective on this topic, which focuses on the nature of data, personal data, data ownership, consent and purpose of use, trustworthiness of data and those using the data, and issues related to privacy and confidentiality is published in Big Data.