code: package it.unibz.inf.ontop.iq.node;
  
  
  import it.unibz.inf.ontop.iq.exception.QueryNodeTransformationException;
  import it.unibz.inf.ontop.iq.transform.node.HomogeneousQueryNodeTransformer;
  
  /**
   * Operator QueryNode which are binary and whose operands ordering is semantically meaningful.
   *
   * For instance: Left Join.
   */
  public interface BinaryNonCommutativeOperatorNode extends BinaryOrderedOperatorNode {
  
      BinaryNonCommutativeOperatorNode acceptNodeTransformer(HomogeneousQueryNodeTransformer transformer)
              throws QueryNodeTransformationException;
  }
  