 With respect to the main definitions of the concept of information, like Shannon Information, Kolmogorov complexity, semantic information and quantum information, a unifying approach to a philosophy of information is possible, when we interpret it as an extension to the philosophy of mathematics. The answer to questions like “What is data?” and “What is information?” then evolves from one’s answer to the related questions like “What is a set?” and “What is a number?” With hindsight one can observe that many open problems in the philosophy of mathematics revolve around the notion of information. 