1 files changed, 11 insertions, 0 deletions
diff --git a/searchlib/src/main/java/com/yahoo/searchlib/rankingexpression/rule/BooleanNode.java b/searchlib/src/main/java/com/yahoo/searchlib/rankingexpression/rule/BooleanNode.java
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index 00000000000..22b777d4b9d
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+++ b/searchlib/src/main/java/com/yahoo/searchlib/rankingexpression/rule/BooleanNode.java
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+// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.searchlib.rankingexpression.rule;
+
+/**
+ * A node which produces a boolean value when evaluated.
+ *
+ * @author bratseth
+ * @since  5.1.21
+ */
+public abstract class BooleanNode extends CompositeNode {
+}