.xml file containing the expressions..
                                    NoteEvery customized expression is identified by its name field
                                          in the  
                                       
                                       .xml file. This name is a unique internal
                                          name that does not display on the management console.If the file contains a customized expression that already exists, IMSVA overwrites the existing
                                          expression. To retain the existing expression, change its internal name
                                          before importing the expression file. 
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