diff --git a/bundles/org.eclipse.chronograph.api/src/org/eclipse/chronograph/internal/api/Data.java b/bundles/org.eclipse.chronograph.api/src/org/eclipse/chronograph/internal/api/Data.java
new file mode 100644
index 0000000..e7d8c64
--- /dev/null
+++ b/bundles/org.eclipse.chronograph.api/src/org/eclipse/chronograph/internal/api/Data.java
@@ -0,0 +1,32 @@
+/*******************************************************************************
+ * Copyright (c) 2020 ArSysOp
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * https://www.eclipse.org/legal/epl-2.0/.
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ *     ArSysOp - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.chronograph.internal.api;
+
+import java.util.List;
+import java.util.function.Predicate;
+
+/**
+ * 
+ * Encapsulates the storage of objects to be displayed
+ *
+ */
+public interface Data {
+
+	/**
+	 * 
+	 * @param predicate the predicate to filter the bricks
+	 * @return
+	 */
+	List<Brick> query(Predicate<Brick> predicate);
+
+}
diff --git a/bundles/org.eclipse.chronograph.base/src/org/eclipse/chronograph/internal/base/DataRegistry.java b/bundles/org.eclipse.chronograph.base/src/org/eclipse/chronograph/internal/base/PlainData.java
similarity index 92%
rename from bundles/org.eclipse.chronograph.base/src/org/eclipse/chronograph/internal/base/DataRegistry.java
rename to bundles/org.eclipse.chronograph.base/src/org/eclipse/chronograph/internal/base/PlainData.java
index 20dc0b1..f8e821a 100644
--- a/bundles/org.eclipse.chronograph.base/src/org/eclipse/chronograph/internal/base/DataRegistry.java
+++ b/bundles/org.eclipse.chronograph.base/src/org/eclipse/chronograph/internal/base/PlainData.java
@@ -19,9 +19,11 @@
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.function.Predicate;
 import java.util.stream.Collectors;
 
 import org.eclipse.chronograph.internal.api.Brick;
+import org.eclipse.chronograph.internal.api.Data;
 import org.eclipse.chronograph.internal.api.Group;
 import org.eclipse.chronograph.internal.api.Section;
 import org.eclipse.chronograph.internal.api.providers.BrickContentProvider;
@@ -34,8 +36,7 @@
  * Class intended to aggregate data
  *
  */
-//FIXME extract interface
-public class DataRegistry {
+public class PlainData implements Data {
 
 	private final ContainerProvider provider;
 	private final Map<String, Section> sectionsById = new HashMap<>();
@@ -43,7 +44,7 @@ public class DataRegistry {
 	private final Map<Group, List<Group>> subGroupsBygroup = new HashMap<>();
 	private final Map<Group, List<Brick>> bricksBySubgroup = new HashMap<>();
 
-	public DataRegistry(ContainerProvider provider) {
+	public PlainData(ContainerProvider provider) {
 		this.provider = provider;
 	}
 
@@ -133,4 +134,12 @@ public List<Brick> getBricks() {
 				.flatMap(List::stream) //
 				.collect(Collectors.toList());
 	}
+
+	@Override
+	public List<Brick> query(Predicate<Brick> predicate) {
+		return bricksBySubgroup.values().stream() //
+				.flatMap(List::stream) //
+				.filter(predicate) //
+				.collect(Collectors.toList());
+	}
 }