是否可以找到两个节点的差异并将该差异用作特定控件的约束。
<xforms:bind id="DebitRebate1"
nodeset="instance('charge-options-setup')/Pattern_Setup1/Pattern1/DebitRebate1"
type="xforms:double"
constraint=". < instance('charge-options-setup')/Pattern_Setup1/Pattern1/DebitPrice1
and instance('charge-options-setup')/Pattern_Setup1/Pattern1/DebitPrice1-. >
instance('charge-options-setup')/Locations_Patterns/Debit_Minimum_Margin"/>