Patent ID: 7653064

Claim:
A method of modifying a data message during transmission through a data communications data communications network, the data communications network being arranged to deliver messages under control of a network operator and comprising a first store-and-forward network node, the first store-and-forward network node being arranged to store said data messages and forward the same to a recipient in dependence on status data corresponding to a terminal associated therewith, the method comprising: receiving a message at a second store-and-forward node, wherein the second store-and-forward network node is different from said last store-and-forward network node; arranging for the message to be modified before being forwarded from the second store-and-forward node; transmitting the message to the first store-and-forward network node for forwarding to the recipient; wherein the message has a message body comprising first data and transmission data identifying a destination of said message, wherein the first data have been created by an information service, the method further comprising: selecting second data and including the selected second data in the message body, whereby to modify the message before being forwarded from the second store-and-forward node; and selecting said second data from a store of selectable data; wherein the store is one of the plurality of stores, each of the plurality of stores being associated with a different subject and each having selectable data therein, and wherein an identifier identifying one of the subjects has been received prior to receipt of the said message, the identifier thereby identifying a store from which data are to be selected.