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diff --git a/eaaf_core_api/src/main/java/at/gv/egiz/eaaf/core/api/idp/auth/modules/AuthModule.java b/eaaf_core_api/src/main/java/at/gv/egiz/eaaf/core/api/idp/auth/modules/AuthModule.java
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+/*******************************************************************************
+ * Copyright 2017 Graz University of Technology
+ * EAAF-Core Components has been developed in a cooperation between EGIZ,  
+ * A-SIT Plus, A-SIT, and Graz University of Technology.
+ *
+ * Licensed under the EUPL, Version 1.2 or - as soon they will be approved by
+ * the European Commission - subsequent versions of the EUPL (the "Licence");
+ * You may not use this work except in compliance with the Licence.
+ * You may obtain a copy of the Licence at:
+ * https://joinup.ec.europa.eu/news/understanding-eupl-v12
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the Licence is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the Licence for the specific language governing permissions and
+ * limitations under the Licence.
+ *  
+ * This product combines work with different licenses. See the "NOTICE" text
+ * file for details on the various modules and licenses.
+ * The "NOTICE" text file is part of the distribution. Any derivative works
+ * that you distribute must include a readable copy of the "NOTICE" text file.
+ *******************************************************************************/
+/*******************************************************************************
+ *******************************************************************************/
+/*******************************************************************************
+ *******************************************************************************/
+package at.gv.egiz.eaaf.core.api.idp.auth.modules;
+
+import at.gv.egiz.eaaf.core.api.idp.process.ExecutionContext;
+
+/**
+ * Provides metadata of a certain module. Uses for module discovery and process selection.
+ */
+public interface AuthModule {
+
+	/**
+	 * Returns the priority of the module. The priority defines the order of the respective module within the chain of
+	 * discovered modules. Higher priorized modules are asked before lower priorized modules for a process that they can
+	 * handle.
+	 * <p/>
+	 * Internal default modules are priorized neutral ({@code 0}. Use a higher priority ({@code 1...Integer.MAX_VALUE})
+	 * in order to have your module(s) priorized or a lower priority ({@code Integer.MIN_VALUE...-1}) in order to put
+	 * your modules behind default modules.
+	 * 
+	 * @return the priority of the module.
+	 */
+	int getPriority();
+
+	/**
+	 * Selects a process (description), referenced by its unique id, which is able to perform authentication with the
+	 * given {@link ExecutionContext}. Returns {@code null} if no appropriate process (description) was available within
+	 * this module.
+	 * 
+	 * @param context
+	 *            an ExecutionContext for a process.
+	 * @return the process-ID of a process which is able to work with the given ExecutionContext, or {@code null}.
+	 */
+	String selectProcess(ExecutionContext context);
+
+	/**
+	 * Returns the an Array of {@link ProcessDefinition}s of the processes included in this module.
+	 * 
+	 * @return an array of resource uris of the processes included in this module.
+	 */
+	String[] getProcessDefinitions();
+
+}