XOR Boolean Operator in HIP

In the advanced or power search option of their HIP (Horizon Information Portal), many DALNET libraries have the ability to choose the Boolean operators AND, OR, NOT, or XOR.  Though it is not a popular option, many people have wondered what the XOR means or how it can be used. 

XOR stands for ‘Exclusive OR Operator.’  XOR specifies that either word, but not both can appear in the record.  As an example, executing a title keyword search of “apple” and a title keyword search of “orange” with the XOR option chosen will result in items with the words apple OR orange in the title of the record, but not both.

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