DEVICE DATA VALIDITY

A method for managing device data comprising the steps of receiving from one or more devices values of one or more attributes. Storing the values of the one or more attributes associated with the one or more devices in a memory store. Maintaining synchronisation of the one or more values between the attributes stored in the memory store and the corresponding attributes associated with the devices, wherein the device attributes comprise at least a first attribute. Receiving a request for the value of the first attribute. Determining if the value of the first attribute has expired. If the stored value of the first attribute has expired then receiving the value of the first attribute from the one or more devices and providing the received value of the first attribute in response to the request.