A computer readable medium stores a data management program that manages data, provides the data to a client connected over a network, and is capable of performing communications in accordance with a plurality of types of protocols, the data management program causing a computer to execute a process for the data management, the process comprising managing an access right to the data; managing basic policy information concerning a protocol used for providing the data to the client; managing protocol information that sets, for each protocol, data capable of using the protocol as a protocol used for providing the data; analyzing an environment of the client when a data request from the client is received; and determining a protocol used for providing the requested data according to the analyzed client environment, the access right, the basic policy information and the protocol information.