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//ClassOrInterfaceDeclaration[@Interface='true'][not(.//MethodDeclaration)]//FieldDeclaration had problem: Cannot compare xs:boolean to xs:string
net.sf.saxon.trans.XPathException: Cannot compare xs:boolean to xs:string	at net.sf.saxon.expr.ValueComparison.compare(ValueComparison.java:638)	at net.sf.saxon.expr.GeneralComparison.compare(GeneralComparison.java:619)	at net.sf.saxon.expr.SingletonComparison.effectiveBooleanValue(SingletonComparison.java:102)	at net.sf.saxon.expr.QuantifiedExpression.effectiveBooleanValue(QuantifiedExpression.java:226)	at net.sf.saxon.expr.FilterIterator$NonNumeric.matches(FilterIterator.java:182)	at net.sf.saxon.expr.FilterIterator.getNextMatchingItem(FilterIterator.java:65)	at net.sf.saxon.expr.FilterIterator.next(FilterIterator.java:44)	at net.sf.saxon.expr.ContextMappingIterator.next(ContextMappingIterator.java:51)	at net.sf.saxon.value.SequenceExtent.(SequenceExtent.java:98)	at net.sf.saxon.sort.DocumentOrderIterator.(DocumentOrderIterator.java:30)	at net.sf.saxon.sort.DocumentSorter.iterate(DocumentSorter.java:85)	at net.sf.saxon.sxpath.XPathExpression.evaluate(XPathExpression.java:98)	at net.sourceforge.pmd.lang.rule.xpath.SaxonXPathRuleQuery.evaluate(SaxonXPathRuleQuery.java:111)	at net.sourceforge.pmd.lang.rule.XPathRule.evaluate(XPathRule.java:74)	at net.sourceforge.pmd.lang.rule.XPathRule.apply(XPathRule.java:61)	at net.sourceforge.pmd.RuleSet.apply(RuleSet.java:306)	at net.sourceforge.pmd.RuleSets.apply(RuleSets.java:125)	at net.sourceforge.pmd.util.designer.Designer$XPathListener.actionPerformed(Designer.java:622)	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)	at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)	at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)	at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)	at java.awt.Component.processMouseEvent(Component.java:6535)	at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)	at java.awt.Component.processEvent(Component.java:6300)	at java.awt.Container.processEvent(Container.java:2236)	at java.awt.Component.dispatchEventImpl(Component.java:4891)	at java.awt.Container.dispatchEventImpl(Container.java:2294)	at java.awt.Component.dispatchEvent(Component.java:4713)	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525)	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466)	at java.awt.Container.dispatchEventImpl(Container.java:2280)	at java.awt.Window.dispatchEventImpl(Window.java:2750)	at java.awt.Component.dispatchEvent(Component.java:4713)	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)	at java.awt.EventQueue.access$500(EventQueue.java:97)	at java.awt.EventQueue$3.run(EventQueue.java:709)	at java.awt.EventQueue$3.run(EventQueue.java:703)	at java.security.AccessController.doPrivileged(Native Method)	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)	at java.awt.EventQueue$4.run(EventQueue.java:731)	at java.awt.EventQueue$4.run(EventQueue.java:729)	at java.security.AccessController.doPrivileged(Native Method)	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)	at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)	at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)