1 files changed, 19 insertions, 0 deletions

diff --git a/subprojects/viatra-runtime/src/main/java/tools/refinery/viatra/runtime/matchers/psystem/rewriters/IDerivativeModificationReason.java b/subprojects/viatra-runtime/src/main/java/tools/refinery/viatra/runtime/matchers/psystem/rewriters/IDerivativeModificationReason.java
new file mode 100644
index 00000000..dbd6a78d
--- /dev/null
+++ b/subprojects/viatra-runtime/src/main/java/tools/refinery/viatra/runtime/matchers/psystem/rewriters/IDerivativeModificationReason.java
@@ -0,0 +1,19 @@
+/*******************************************************************************
+ * Copyright (c) 2010-2017, Grill Balázs, IncQueryLabs
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v. 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-v20.html.
+ * 
+ * SPDX-License-Identifier: EPL-2.0
+ *******************************************************************************/
+package tools.refinery.viatra.runtime.matchers.psystem.rewriters;
+
+/**
+ * This is a role indication interface, implementations may provide a reason about
+ * why a modification is made during PQuery normalization.
+ * @since 1.6
+ *
+ */
+public interface IDerivativeModificationReason {
+
+}