The string can be up to 250 characters. I need it for comparison reasons. I need to compare two records (actually recordrefs) with each other. Of course the easiest way to do this is to compare just the Format(FRef) of each field. But this is also the slowest as I have to loop through a very large number of records. All other data types do have a kind of integer expression or are easily convertable. Option, Integer and BigIntager are already BIGInteger ROUND(Decimal * 10000000,1) is a BIGINT BLOBS have a size (BIGINT) Date - Date = BIGINT Time - Time = BIGINT DateTime - DateTime = BIGINT only strings (text and code) are different. I was already thinking about a MD5 from the Navision Hash 1.0 automation server, but that returns a string again [:D] Integ