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diff --git a/src/de/lmu/ifi/dbs/elki/algorithm/clustering/gdbscan/FourCCorePredicate.java b/src/de/lmu/ifi/dbs/elki/algorithm/clustering/gdbscan/FourCCorePredicate.java
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+++ b/src/de/lmu/ifi/dbs/elki/algorithm/clustering/gdbscan/FourCCorePredicate.java
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+package de.lmu.ifi.dbs.elki.algorithm.clustering.gdbscan;
+
+/*
+ This file is part of ELKI:
+ Environment for Developing KDD-Applications Supported by Index-Structures
+
+ Copyright (C) 2014
+ 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.algorithm.clustering.correlation.FourC;
+import de.lmu.ifi.dbs.elki.algorithm.clustering.gdbscan.PreDeConNeighborPredicate.PreDeConModel;
+import de.lmu.ifi.dbs.elki.data.type.SimpleTypeInformation;
+import de.lmu.ifi.dbs.elki.database.Database;
+import de.lmu.ifi.dbs.elki.database.ids.DBIDRef;
+import de.lmu.ifi.dbs.elki.utilities.documentation.Reference;
+import de.lmu.ifi.dbs.elki.utilities.optionhandling.AbstractParameterizer;
+import de.lmu.ifi.dbs.elki.utilities.optionhandling.parameterization.Parameterization;
+
+/**
+ * The PreDeCon core point predicate -- having at least minpts. neighbors, and a
+ * maximum preference dimensionality of lambda.
+ * 
+ * <p>
+ * Reference:
+ * <p>
+ * C. Böhm, K. Kailing, P. Kröger, A. Zimek:<br />
+ * Computing Clusters of Correlation Connected Objects. <br>
+ * In Proc. ACM SIGMOD Int. Conf. on Management of Data, Paris, France, 2004.
+ * </p>
+ * 
+ * @author Erich Schubert
+ * 
+ * @apiviz.has Instance
+ */
+@Reference(authors = "C. Böhm, K. Kailing, P. Kröger, A. Zimek", //
+title = "Computing Clusters of Correlation Connected Objects", //
+booktitle = "Proc. ACM SIGMOD Int. Conf. on Management of Data, Paris, France, 2004, 455-466", //
+url = "http://dx.doi.org/10.1145/1007568.1007620")
+public class FourCCorePredicate implements CorePredicate {
+  /**
+   * The PreDeCon settings class.
+   */
+  protected FourC.Settings settings;
+
+  /**
+   * Default constructor.
+   * 
+   * @param settings PreDeCon settings
+   */
+  public FourCCorePredicate(FourC.Settings settings) {
+    super();
+    this.settings = settings;
+  }
+
+  @SuppressWarnings("unchecked")
+  @Override
+  public <T> CorePredicate.Instance<T> instantiate(Database database, SimpleTypeInformation<?> type) {
+    return (CorePredicate.Instance<T>) new Instance(settings);
+  }
+
+  @Override
+  public boolean acceptsType(SimpleTypeInformation<?> type) {
+    return (type.getRestrictionClass().isAssignableFrom(PreDeConModel.class));
+  }
+
+  /**
+   * Instance for a particular data set.
+   * 
+   * @author Erich Schubert
+   */
+  public static class Instance implements CorePredicate.Instance<PreDeConModel> {
+    /**
+     * The PreDeCon settings class.
+     */
+    protected FourC.Settings settings;
+
+    /**
+     * Constructor for this predicate.
+     * 
+     * @param settings PreDeCon settings
+     */
+    public Instance(FourC.Settings settings) {
+      super();
+      this.settings = settings;
+    }
+
+    @Override
+    public boolean isCorePoint(DBIDRef point, PreDeConModel model) {
+      return (model.pdim <= settings.lambda) && (model.ids.size() >= settings.minpts);
+    }
+  }
+
+  /**
+   * Parameterization class
+   * 
+   * @author Erich Schubert
+   * 
+   * @apiviz.exclude
+   */
+  public static class Parameterizer extends AbstractParameterizer {
+    /**
+     * The PreDeCon settings class.
+     */
+    protected FourC.Settings settings;
+
+    @Override
+    protected void makeOptions(Parameterization config) {
+      super.makeOptions(config);
+      settings = config.tryInstantiate(FourC.Settings.class);
+    }
+
+    @Override
+    protected FourCCorePredicate makeInstance() {
+      return new FourCCorePredicate(settings);
+    }
+  }
+}
+\ No newline at end of file