diff --git a/AlgebraicDataflowArchitectureModel/src/models/algebra/Symbol.java b/AlgebraicDataflowArchitectureModel/src/models/algebra/Symbol.java
index dcdba9f..047f906 100644
--- a/AlgebraicDataflowArchitectureModel/src/models/algebra/Symbol.java
+++ b/AlgebraicDataflowArchitectureModel/src/models/algebra/Symbol.java
@@ -1,5 +1,7 @@
 package models.algebra;
 
+import java.util.List;
+
 public class Symbol {
 	protected String name;
 	protected String implName;
@@ -10,6 +12,7 @@
 	protected models.algebra.Type[] signature = null;
 	protected int[] implParamOrder = null;
 	protected IImplGenerator generator = null;
+	protected ICalculator calculator = null;
 	
 	public Symbol(String name) {
 		this.name = name;
@@ -66,6 +69,37 @@
 		}
 	}
 	
+	public Symbol(String name, int arity, ICalculator calculator) {
+		this.name = name;
+		this.arity = arity;
+		this.calculator = calculator;
+	}
+	
+	public Symbol(String name, int arity, Type operatorType, ICalculator calculator) {
+		this.name = name;
+		this.arity = arity;
+		this.operatorType = operatorType;
+		this.calculator = calculator;
+	}
+	
+	public Symbol(String name, int arity, Type operatorType, IImplGenerator generator, ICalculator calculator) {
+		this.name = name;
+		this.arity = arity;
+		this.operatorType = operatorType;
+		this.generator = generator;
+		this.implOperatorType = Type.GENERATIVE;
+		this.calculator = calculator;
+	}
+	
+	public Symbol(String name, int arity, Type operatorType, String implName, Type implOperatorType, ICalculator calculator) {
+		this.name = name;
+		this.implName = implName;
+		this.arity = arity;
+		this.operatorType = operatorType;
+		this.implOperatorType = implOperatorType;
+		this.calculator = calculator;
+	}
+	
 	public void setArity(int arity) {
 		this.arity = arity;
 	}
@@ -171,6 +205,17 @@
 		}
 		return null;
 	}
+	
+	public boolean isCalculatable() {
+		return (calculator != null);
+	}
+	
+	public Constant calculate(List<Constant> args) {
+		if (calculator != null) {
+			return calculator.calculate(args);
+		}
+		return null;
+	}
 
 	public boolean equals(Object another) {
 		if (!(another instanceof Symbol)) return false;
@@ -232,4 +277,8 @@
 		 */
 		public String generate(models.algebra.Type type, models.algebra.Type[] childrenTypes, String children[], String[] childrenSideEffects, String[] sideEffect);
 	}
+	
+	public interface ICalculator {
+		public Constant calculate(List<Constant> args);
+	}
 }