Today i had write the Regular Expression to match Italian Istat Ateco Code (formally Codice Istat) updated to Ateco-Istat 2004. The regex expression is downloadable from : http://regexlib.com/REDetails.aspx?regexp_id=1620This is the source : \d{2}[.]{1}\d{2}[.]{1}[0-9A-Za-z]{1}This is the match : 22.12.0|18.24.CThis is the unmatch : 22.12_D|12.56| 1A.56.1 
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