Described are a method and a system for using XML in a real-time message for transmission of data from a source to a destination over a network. The real-time XML message includes a header element and a body element. The header element includes one or more destination elements and one source element, each having a unique identifier and a set of pre-defined and user-defined real-time properties. The body element of the message includes the data to be carried to the destination in plain or encoded XML content. XML addresses are proposed as the identifier of the source and destination, and an XML naming service can look up an XML address from the canonical name of the source and destination. Advantageously, the real-time message can be transported through the network using XML addresses included in the destination and source elements of the message.