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<?xml version="1.0" encoding="UTF-8"?>
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This query illustrates how a BooleanFilter can be used to combine
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multiple filters in the same way BooleanQueries can be combined
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with must, should and mustnot clauses
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<Clause occurs="should">
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<RangeFilter fieldName="date" lowerTerm="19870409" upperTerm="19870412"/>
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<Clause occurs="mustNot">
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<TermsFilter fieldName="contents">Emcore</TermsFilter>