datetime-from-date-and-time
Returns an xs:dateTime value built from an xs:date value (first argument) and an xs:time value (second argument). The result can be mapped to a string or xs:dateTime data type.

Languages
Built-in, C++, C#, Java.
Parameters
Name  | Type  | Description  | 
|---|---|---|
datevalue  | xs:date  | Provides a value of type xs:date  | 
timevalue  | xs:time  | Provides a value of type xs:time  | 
Example
If the first argument is 2012-06-29 and the second argument is 11:59:55, the function returns 2012-06-29T11:59:55.