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diff --git a/container-search/src/main/java/com/yahoo/prelude/semantics/rule/Production.java b/container-search/src/main/java/com/yahoo/prelude/semantics/rule/Production.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.prelude.semantics.rule;
+
+import java.util.Set;
+
+import com.yahoo.prelude.semantics.engine.RuleEvaluation;
+
+/**
+ * A new term produced by a production rule
+ *
+ * @author <a href="mailto:bratseth@yahoo-inc.com">Jon S Bratseth</a>
+ */
+public abstract class Production {
+
+    /** True to add, false to replace, default true */
+    protected boolean replacing=true;
+
+    /** The (0-base) position of this term in the productions of this rule */
+    private int position=0;
+
+    /** The weight (strength) of this production as a percentage (default is 100) */
+    private int weight=100;
+
+    /** Creates a produced template term with no label and the default type */
+    public Production() {
+    }
+
+    /** True to replace, false to add, if this production can do both. Default true. */
+    public void setReplacing(boolean replacing) { this.replacing=replacing; }
+
+    public int getPosition() { return position; }
+
+    public void setPosition(int position) { this.position = position; }
+
+    /** Sets the weight of this production as a percentage (default is 100) */
+    public void setWeight(int weight) { this.weight=weight; }
+
+    /** Returns the weight of this production as a percentage (default is 100) */
+    public int getWeight() { return weight; }
+
+    /**
+     * Produces this at the current match
+     *
+     * @param e the evaluation context containing the current match and the query
+     * @param offset the offset position at which to produce this. Offsets are used to produce multiple items
+     *        at one position, inserted in the right order.
+     */
+    public abstract void produce(RuleEvaluation e,int offset);
+
+    /**
+     * Called to add the references into the condition of this rule made by this production
+     * into the given set. The default implementation is void, override for productions
+     * which refers to the condition
+     */
+    void addMatchReferences(Set<String> matchReferences) { }
+
+    /** All instances of this produces a parseable string output */
+    public final String toString() {
+        return toInnerString() + (getWeight()!=100 ? ("!" + getWeight()) : "");
+    }
+
+    /** All instances of this produces a parseable string output */
+    protected abstract String toInnerString();
+
+}