diff --git a/paxtools-core/src/main/java/org/biopax/paxtools/controller/Integrator.java b/paxtools-core/src/main/java/org/biopax/paxtools/controller/Integrator.java
index <HASH>..<HASH> 100644
--- a/paxtools-core/src/main/java/org/biopax/paxtools/controller/Integrator.java
+++ b/paxtools-core/src/main/java/org/biopax/paxtools/controller/Integrator.java
@@ -11,7 +11,7 @@ import java.util.*;
 
 /**
  *
- * This class is intended to merge and to integrate biopax models
+ * This class is intended to merge and to integrate <em>BioPAX Level2</em> models
  * not necessarily from the same resource - if models allow such a
  * thing. This class has very similar functionality to the controller.Merger
  * but it differs in means of merging/integrating methodology.
Comment: the ..controller.Integrator  is for BioPAX Level2 models (an is old, needs testing...)