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diff --git a/org.argeo.server.core/src/main/java/org/argeo/server/dao/LightDaoSupport.java b/org.argeo.server.core/src/main/java/org/argeo/server/dao/LightDaoSupport.java
new file mode 100644
index 000000000..6ea1b754d
--- /dev/null
+++ b/org.argeo.server.core/src/main/java/org/argeo/server/dao/LightDaoSupport.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2007-2012 Argeo GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.argeo.server.dao;
+
+import java.util.List;
+
+/** Minimal generic DAO for easy to implements objects <-> storage mapping. */
+public interface LightDaoSupport {
+	/** Retrieve an object of a given type by its unique key. */
+	public <T> T getByKey(Class<T> clss, Object key);
+
+	/** Retrieve an object of a given type by the value of one of its fields. */
+	public <T> T getByField(Class<T> clss, String field, Object value);
+
+	/** List all objects, optionally filtering them (implementation dependent) */
+	public <T> List<T> list(Class<T> clss, Object filter);
+
+	/** Lis all supported object types. */
+	public List<Class<?>> getSupportedClasses();
+
+	/** Save or update an object */
+	public void saveOrUpdate(Object key, Object value, Class<?> clss);
+}