When using the data export routine, you may need to give the export file a unique name or be able to reference it by date. This can be done using tags. The tag format is as follows [{myExpression}]

The expression could be any of the columns in the export routine, like  [{nOrderId}] - C:\Users\Me\Desktop\export_[{nOrderId}].csv . If there is going to be more than one order id in the export, the first one will be selected as the file name. 

The date can also be used using the following: 

[{TODAY}]  2012-01-13

[{NOW}]    2012-01-13_00_00_00

[{WEEK}] 201202

[{MONTH}]  201201