diff --git a/obdalib/obdalib-core/src/main/java/org/obda/query/domain/imp/PredicateImp.java b/obdalib/obdalib-core/src/main/java/org/obda/query/domain/imp/PredicateImp.java
index <HASH>..<HASH> 100644
--- a/obdalib/obdalib-core/src/main/java/org/obda/query/domain/imp/PredicateImp.java
+++ b/obdalib/obdalib-core/src/main/java/org/obda/query/domain/imp/PredicateImp.java
@@ -8,11 +8,11 @@ public class PredicateImp implements Predicate{
 

 	private int arity = -1;

 	private URI name = null;

-	private int identfier = -1;

+	private int identifier = -1;

 

 	protected PredicateImp (URI name, int arity){

 		this.name = name;

-		this.identfier = name.toString().hashCode();

+		this.identifier = name.toString().hashCode();

 		this.arity = arity;

 	}

 

@@ -40,12 +40,12 @@ public class PredicateImp implements Predicate{
 		if (pred2.arity != arity)

 			return false;

 

-		return this.identfier == pred2.identfier;

+		return this.identifier == pred2.identifier;

 	}

 

 	@Override

 	public int hashCode(){

-		return identfier;

+		return identifier;

 	}

 

 	@Override
Type correction in the variable name: indentfier to identifier.