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diff --git a/src/de/lmu/ifi/dbs/elki/index/tree/spatial/rstarvariants/strategies/reinsert/ReinsertStrategy.java b/src/de/lmu/ifi/dbs/elki/index/tree/spatial/rstarvariants/strategies/reinsert/ReinsertStrategy.java
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--- /dev/null
+++ b/src/de/lmu/ifi/dbs/elki/index/tree/spatial/rstarvariants/strategies/reinsert/ReinsertStrategy.java
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+package de.lmu.ifi.dbs.elki.index.tree.spatial.rstarvariants.strategies.reinsert;
+
+/*
+ This file is part of ELKI:
+ Environment for Developing KDD-Applications Supported by Index-Structures
+
+ Copyright (C) 2012
+ Ludwig-Maximilians-Universität München
+ Lehr- und Forschungseinheit für Datenbanksysteme
+ ELKI Development Team
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Affero General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+import de.lmu.ifi.dbs.elki.data.spatial.SpatialComparable;
+import de.lmu.ifi.dbs.elki.utilities.datastructures.arraylike.ArrayAdapter;
+
+/**
+ * Reinsertion strategy to resolve overflows in the RStarTree.
+ * 
+ * @author Erich Schubert
+ */
+public interface ReinsertStrategy {
+  /**
+   * Perform reinsertions.
+   * 
+   * @param entries Entries in overflowing node
+   * @param getter Adapter for the entries array
+   * @param page Spatial extend of the page
+   * @return index of pages to reinsert.
+   */
+  public <A> int[] computeReinserts(A entries, ArrayAdapter<? extends SpatialComparable, ? super A> getter, SpatialComparable page);
+}