3.7.1 Data Exchange

An XML document exchanged via IFdtCommunication and IFdtCommunicationEvents can contain version dependent attributes and elements. Unlike attributes of a newer version, which can be defined and handled as optional, new elements in a higher version would not be recognized by the parent component of an older version and can produce unpredictable behaviour in such a component.

Therefore a DTM can only use communication documents according to the FDT version of its parent component. This version information of the parent component must be provided within the IFdtCommunicationEvents2::OnConnectResponse2(). A DTM can then use only communication documents compatible to this FDT version.