XSBuiltIns

TXSDuration acts as a wrapper for the simple scalar type duration that W3C defines for XML schemas. That is, TXSDuration represents the interval between two points in time. Because this type does not correspond directly to a Delphi or C++ type, it requires special marshaling when used in an invokable interface. TXSDuration enables this marshaling because it is a descendant of TRemotable. 

To convert a TXSDuration value to a TDateTime value, use the AsDateTime property.  

On server applications, instances of TXSDuration that are input parameters on an invokable interface are automatically created when the method call is unmarshaled and automatically freed after any output parameters or return value are marshaled so that they can be sent to the client. When a TXSDuration instance is created in a method that was called remotely using an invokable interface, the instance is automatically freed after the value of the TRemotable descendant is marshaled for transport back to the client application. 

The caller of an invokable interface (client) is responsible for creating any TXSDuration instances that it passes as input parameters, and for freeing any TXSDuration instances it creates or that are returned as output parameters or method results. 

IInvokable 

TXSDate 

TXSTime