diff --git a/examples/calculator/DivisionModel.hpp b/examples/calculator/DivisionModel.hpp
index b059662..c51a5bc 100644
--- a/examples/calculator/DivisionModel.hpp
+++ b/examples/calculator/DivisionModel.hpp
@@ -22,7 +22,32 @@ public:
   QString
   caption() const override
   { return QString("Division"); }
+  
+  virtual bool
+  portCaptionVisible(PortType portType, PortIndex portIndex) const override
+  { return true; }
 
+  virtual QString
+  portCaption(PortType portType, PortIndex portIndex) const override
+  {
+    switch (portType)
+    {
+      case PortType::In:
+        if (portIndex == 0)
+          return QString("Dividend");
+        else if (portIndex == 1)
+          return QString("Divisor");
+        break;
+
+      case PortType::Out:
+        return QString("Result");
+
+      default:
+        break;
+    }
+	return QString("");
+  }
+  
   QString
   name() const override
   { return QString("Division"); }
diff --git a/examples/calculator/SubtractionModel.hpp b/examples/calculator/SubtractionModel.hpp
index 745bbcc..e5a1b49 100644
--- a/examples/calculator/SubtractionModel.hpp
+++ b/examples/calculator/SubtractionModel.hpp
@@ -24,6 +24,31 @@ public:
   caption() const override
   { return QString("Subtraction"); }
 
+  virtual bool
+  portCaptionVisible(PortType portType, PortIndex portIndex) const override
+  { return true; }
+
+  virtual QString
+  portCaption(PortType portType, PortIndex portIndex) const override
+  {
+    switch (portType)
+    {
+    case PortType::In:
+      if (portIndex == 0)
+        return QString("Minuend");
+      else if (portIndex == 1)
+        return QString("Subtrahend");
+      break;
+
+    case PortType::Out:
+      return QString("Result");
+
+    default:
+      break;
+    }
+	return QString("");
+  }
+
   QString
   name() const override
   { return QString("Subtraction"); }
diff --git a/src/NodeDataModel.hpp b/src/NodeDataModel.hpp
index 68750de..82ae8f3 100644
--- a/src/NodeDataModel.hpp
+++ b/src/NodeDataModel.hpp
@@ -29,6 +29,14 @@ public:
   virtual bool
   captionVisible() const { return true; }
 
+  /// Port caption is used in GUI to label individual ports
+  virtual QString
+  portCaption(PortType portType, PortIndex portIndex) const { return QString(""); }
+
+  /// It is possible to hide port caption in GUI
+  virtual bool
+  portCaptionVisible(PortType portType, PortIndex portIndex) const { return false; }
+
   /// Name makes this model unique
   virtual QString
   name() const = 0;
diff --git a/src/NodeGeometry.cpp b/src/NodeGeometry.cpp
index 748a283..0d9a516 100644
--- a/src/NodeGeometry.cpp
+++ b/src/NodeGeometry.cpp
@@ -256,7 +256,13 @@ portWidth(PortType portType) const
 
   for (auto i = 0ul; i < _dataModel->nPorts(portType); ++i)
   {
-    auto const &name = _dataModel->dataType(PortType::In, i).name;
+    QString name;
+	
+    if (_dataModel->portCaptionVisible(portType, i))
+      name = _dataModel->portCaption(portType, i);
+    else
+      name = _dataModel->dataType(portType, i).name;
+
     width = std::max(unsigned(_fontMetrics.width(name)),
                      width);
   }
diff --git a/src/NodePainter.cpp b/src/NodePainter.cpp
index d74af05..534709f 100644
--- a/src/NodePainter.cpp
+++ b/src/NodePainter.cpp
@@ -271,7 +271,12 @@ drawEntryLabels(QPainter * painter,
       else
         painter->setPen(nodeStyle.FontColor);
 
-      QString s = model->dataType(portType, i).name;
+      QString s;
+
+      if (model->portCaptionVisible(portType, i))
+        s = model->portCaption(portType, i);
+      else
+        s = model->dataType(portType, i).name;
 
       auto rect = metrics.boundingRect(s);