Many real time applications consist of components that can situate in a centralized/distributed environment. Typically due to different system requirements these components could be developed in different technologies which require a bridge for communication. With the increasing popularity of XML, it has become an alternative solution for data exchange in the real time application domain. XML has become the most important mechanism for data exchange between heterogeneous data sources. This paper presents a methodology for real time application data in XML. By defining a solid XML Schema for the real time domain attributes, applications from diverse platforms can be based on the data definition and create instances of XML documents to exchange data.