  Add | Adds a data structure (Item in the collection) and returns a reference to it (Index starting from 0). |
| Â GetXMLSchema | Retrieves the XML schema of the data structure. |
| Â Item | Returns a reference to an existing item in the collection by its index. |
| Â ToXMLFile | Creates an XML file that represents the object data. |
| Â ToXMLString | Creates an XML string that represents the object data. |
 Â Count | Retrurns the number of MessageDataLine data structures in the data column. |