diff --git a/src/libs/ifc/xml/vabstractpattern.cpp b/src/libs/ifc/xml/vabstractpattern.cpp
index c0c6ea1f1..5b4080c88 100644
--- a/src/libs/ifc/xml/vabstractpattern.cpp
+++ b/src/libs/ifc/xml/vabstractpattern.cpp
@@ -1203,6 +1203,7 @@ QStringList VAbstractPattern::ListExpressions() const
     list << ListArcExpressions();
     list << ListSplineExpressions();
     list << ListIncrementExpressions();
+    list << ListOperationExpressions();
 
     return list;
 }
@@ -1393,6 +1394,29 @@ QStringList VAbstractPattern::ListIncrementExpressions() const
     return expressions;
 }
 
+//---------------------------------------------------------------------------------------------------------------------
+QStringList VAbstractPattern::ListOperationExpressions() const
+{
+    QStringList expressions;
+    const QDomNodeList list = elementsByTagName(TagOperation);
+    for (int i=0; i < list.size(); ++i)
+    {
+        const QDomElement dom = list.at(i).toElement();
+
+        // Each tag can contains several attributes.
+        try
+        {
+            expressions.append(GetParametrString(dom, AttrAngle));
+        }
+        catch (VExceptionEmptyParameter &e)
+        {
+            Q_UNUSED(e)
+        }
+    }
+
+    return expressions;
+}
+
 //---------------------------------------------------------------------------------------------------------------------
 bool VAbstractPattern::IsVariable(const QString &token) const
 {
diff --git a/src/libs/ifc/xml/vabstractpattern.h b/src/libs/ifc/xml/vabstractpattern.h
index 8847ec6ab..45a9901ad 100644
--- a/src/libs/ifc/xml/vabstractpattern.h
+++ b/src/libs/ifc/xml/vabstractpattern.h
@@ -294,6 +294,7 @@ private:
     QStringList ListSplineExpressions() const;
     QStringList ListPathPointExpressions() const;
     QStringList ListIncrementExpressions() const;
+    QStringList ListOperationExpressions() const;
 
     bool IsVariable(const QString& token) const;
     bool IsPostfixOperator(const QString& token) const;