diff --git a/src/org/ntlab/deltaExtractor/DeltaAlias.java b/src/org/ntlab/deltaExtractor/DeltaAlias.java
new file mode 100644
index 0000000..3fd1953
--- /dev/null
+++ b/src/org/ntlab/deltaExtractor/DeltaAlias.java
@@ -0,0 +1,16 @@
+package org.ntlab.deltaExtractor;
+
+import org.ntlab.trace.TracePoint;
+
+public class DeltaAlias extends Alias {
+	boolean bSrcSide = false;
+
+	public DeltaAlias(AliasType aliasType, int index, String objectId, TracePoint occurrencePoint, boolean isSrcSide) {
+		super(aliasType, index, objectId, occurrencePoint);
+		bSrcSide = isSrcSide;
+	}
+
+	public boolean isSrcSide() {
+		return bSrcSide;
+	}
+}