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Description
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An expression that takes values from two or more fields and returns the difference of them. |
Example
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<expression name="Difference\_Column" class="org.jfree.report.function.ColumnDifferenceExpression">
<properties>
<property name="field\[0]">Column_1</property>
<property name="field\[1]">Column_2</property>
</properties>
</expression>
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