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====== SetDifference(list1, list2[, separator]) ======
Category:  Text function

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=====Description=====
This function removes values in //list2// from //list1// with deduplication.

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=====Arguments=====
^Argument^Type^Description^
|list1|List (Text)|A delimited set of string values.|
|list2|List (Text)|A delimited set of string values.|
|separator|Text|The delimiter to use in the concatenation of the output string.  If not defined, the default is comma.|

**Return value type:** Set (Text)

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=====Remarks=====
All leading and trailing spaces are removed from around the list values.

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=====Examples=====

  setdifference("A, B", "B,C") //returns "A"
  
  setdifference("A;B", "C ;D", ";") //returns "A;B"

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===== See also =====
  * [[syntax:functions:setcontainsall|SetContainsAll(list1, list2[, separator])]]
  * [[syntax:functions:setcontainsany|SetContainsAny(list1, list2[, separator])]]
  * [[syntax:functions:setintersection|SetIntersection(list1, list2[, separator])]]
  * [[syntax:functions:setlength|SetLength(list[, separator])]]
  * [[syntax:functions:setsort|SetSort(list[, separator])]]
  * [[syntax:functions:setunion|SetUnion(list1, list2[, separator])]]