diff --git a/src/lib/hierarchy-orientation-indicator.cpp b/src/lib/hierarchy-orientation-indicator.cpp
new file mode 100644
index 000000000..8bc5c356f
--- /dev/null
+++ b/src/lib/hierarchy-orientation-indicator.cpp
@@ -0,0 +1,71 @@
+/*
+  HierarchyOrientationIndicator  -  service for
+  
+  Copyright (C)         Lumiera.org
+    2013,               Hermann Vosseler <Ichthyostega@web.de>
+  
+  This program is free software; you can redistribute it and/or
+  modify it under the terms of the GNU General Public License as
+  published by the Free Software Foundation; either version 2 of
+  the License, or (at your option) any later version.
+  
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+  
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+  
+* *****************************************************/
+
+/** @file hierarchy-orientation-indicator.cpp
+ ** Service for hierarchy-orientation-indicator.
+ ** This header defines the basics of...
+ ** 
+ ** @note as of X/2013 this is complete bs
+ ** @todo WIP  ///////////////////////TICKET #
+ ** 
+ ** @see ////TODO_test usage example
+ ** @see hierarchy-orientation-indicator.cpp implementation
+ ** 
+ */
+
+#include "lib/util.hpp"
+//#include "lib/symbol.hpp"
+//#include "include/logging.h"
+#include "p/FI.hpp"
+#include "hierarchy-orientation-indicator.hpp"
+
+//#include <boost/noncopyable.hpp>
+#include <string>
+#include <map>
+
+using std::map;
+using std::string;
+
+using util::contains;
+using util::isnil;
+
+namespace lib {
+  
+  namespace { // internal details
+  
+  } // internal details
+  
+  NA::~NA ( )
+    {
+    }
+  
+  /**
+   * 
+   * @param id
+   * @return
+   */
+  string fun (string& id)
+    {
+      return "x" + id;
+    }
+
+} // namespace lib
diff --git a/src/lib/hierarchy-orientation-indicator.hpp b/src/lib/hierarchy-orientation-indicator.hpp
new file mode 100644
index 000000000..25c73169d
--- /dev/null
+++ b/src/lib/hierarchy-orientation-indicator.hpp
@@ -0,0 +1,135 @@
+/*
+  HIERARCHY-ORIENTATION-INDICATOR.hpp  -  service for
+  
+  Copyright (C)         Lumiera.org
+    2013,               Hermann Vosseler <Ichthyostega@web.de>
+  
+  This program is free software; you can redistribute it and/or
+  modify it under the terms of the GNU General Public License as
+  published by the Free Software Foundation; either version 2 of
+  the License, or (at your option) any later version.
+  
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+  
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+/** @file hierarchy-orientation-indicator.hpp
+ ** Service for hierarchy-orientation-indicator.
+ ** This header defines the basics of...
+ ** 
+ ** @note as of X/2013 this is complete bs
+ ** @todo WIP  ///////////////////////TICKET #
+ ** 
+ ** @see ////TODO_test usage example
+ ** @see hierarchy-orientation-indicator.cpp implementation
+ ** 
+ */
+
+#ifndef HIERARCHY_ORIENTATION_INDICATOR_HPP_
+#define HIERARCHY_ORIENTATION_INDICATOR_HPP_
+
+#include "lib/error.hpp"
+#include "lib/hash-value.h"
+//#include "lib/symbol.hpp"
+#include "lib/util.hpp"
+
+#include <boost/noncopyable.hpp>
+#include <string>
+
+namespace lib {
+  
+  using lib::HashVal;
+  using util::isnil;
+  using std::string;
+  
+  /**
+   * Basic (abstracted) view of...
+   * 
+   * @see SomeSystem
+   * @see NA_test
+   */
+  template<class X>
+  class Murps
+    {
+      string nothing_;
+
+    public:
+      explicit Murps (string const& b) :
+          nothing_ (b)
+        {
+        }
+      
+      // using default copy/assignment
+      
+      /* == Adapter interface for == */
+
+      void setSolution (string const& solution = "")
+        {
+          UNIMPLEMENTED ("tbw");
+#if false /////////////////////////////////////////////////////////////////////////////////////////////////////////////UNIMPLEMENTED :: TICKET #888
+          if (isDeaf())
+          this->transmogrify (solution);
+#endif    /////////////////////////////////////////////////////////////////////////////////////////////////////////////UNIMPLEMENTED :: TICKET #888
+        }
+      
+    protected:
+      void maybe ( ) const;
+
+      friend HashVal hash_value (Murps const& entry)
+        {
+          return hash_value (entry.nothing_);
+        }
+    };
+  
+  class HierarchyOrientationIndicator
+    {
+      string nothing_;
+
+    public:
+      explicit HierarchyOrientationIndicator (string const& b) :
+          nothing_ (b)
+        {
+        }
+      
+      // using default copy/assignment
+      
+      /* == X interface for == */
+
+      void putXY (string const& crap = "")
+        {
+          UNIMPLEMENTED ("tbw");
+        }
+      
+    protected:
+      void maybe ( ) const;
+
+    public:
+      HierarchyOrientationIndicator ( )
+        {
+          // ////TODO Auto-generated constructor stub
+          
+        }
+      
+      friend HashVal hash_value (HierarchyOrientationIndicator const& entry)
+        {
+          return hash_value (entry.nothing_);
+        }
+    };
+  
+  /** @internal in case
+   */
+  template<class X>
+  inline void Murps<X>::maybe ( ) const
+    {
+      UNIMPLEMENTED ("tbw");
+    }
+
+} // namespace lib
+#endif /*HIERARCHY_ORIENTATION_INDICATOR_HPP_*/
diff --git a/tests/core/proc/engine/dispatcher-interface-test.cpp b/tests/core/proc/engine/dispatcher-interface-test.cpp
index bec2c837c..ad5907fd5 100644
--- a/tests/core/proc/engine/dispatcher-interface-test.cpp
+++ b/tests/core/proc/engine/dispatcher-interface-test.cpp
@@ -217,6 +217,12 @@ namespace test  {
           Duration coveredTime (Offset(refPoint, last(plannedChunk).getNominalTime()));
           CHECK (coveredTime >= timings.getPlanningChunkDuration());
           
+          ///TODO nachfolgendes muß komplett umgeschrieben werden
+          ///TODO definieren, wie das scheduler-interface angesprochen wird
+          ///TODO dann stub dafür bauen
+          ///TODO Idee/Frage: kann man nach den Prerequisites nochmal zum Job *zurückkehren* ?
+          /////////////////// Antwort: nein man kann nicht.
+          
           TimeVar frameStart (refPoint);
           InvocationInstanceID prevInvocationID(0);
           Offset expectedTimeIncrement (1, FrameRate::PAL);
diff --git a/tests/library/hierarchy-orientation-indicator-test.cpp b/tests/library/hierarchy-orientation-indicator-test.cpp
new file mode 100644
index 000000000..0f84f30e2
--- /dev/null
+++ b/tests/library/hierarchy-orientation-indicator-test.cpp
@@ -0,0 +1,228 @@
+/*
+  HierarchyOrientationIndicator(Test)  -  verify generation details
+  
+  Copyright (C)         Lumiera.org
+    2013,               Hermann Vosseler <Ichthyostega@web.de>
+  
+  This program is free software; you can redistribute it and/or
+  modify it under the terms of the GNU General Public License as
+  published by the Free Software Foundation; either version 2 of
+  the License, or (at your option) any later version.
+  
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+  
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+* *****************************************************/
+
+
+#include "lib/test/run.hpp"
+#include "lib/util.hpp"
+
+#include "hierarchy-orientation-indicator.hpp"
+#include "lib/iter-adapter-stl.hpp"
+
+//#include <boost/lexical_cast.hpp>
+#include <boost/operators.hpp>
+//#include <iostream>
+#include <string>
+#include <vector>
+#include <cstdlib>
+
+//using boost::lexical_cast;
+using util::contains;
+using std::string;
+//using std::cout;
+//using std::endl;
+
+namespace lib {
+namespace test {
+  
+  namespace { // test fixture: a random Tree to navigate...
+    
+    using std::rand;
+//  using std::vector;
+    using iter_stl::eachElm;
+    using lib::IterStateWrapper;
+    
+    const uint MAX_ID(100);
+    const uint MAX_CHILDREN(5);
+    const double CHILD_PROBABILITY(0.02);
+    
+    /**
+     * pick a random child count below #MAX_CHILDREN
+     * with a probability to get any count above zero
+     * as defined by CHILD_PROBABILITY
+     */
+    inline uint
+    pick_random_count()
+    {
+      uint bottom((1.0/CHILD_PROBABILITY - 1) * MAX_CHILDREN);
+      uint limit = bottom + MAX_CHILDREN;
+      ASSERT (0 < bottom);
+      ASSERT (bottom < limit);
+      
+      int cnt = (rand() % limit) - bottom;
+      return MAX (0, cnt); 
+    }
+    
+    
+    struct Node
+      : boost::EqualityComparable<Node>
+      {
+        typedef std::vector<Node> Children;
+        typedef RangeIter<Children> ChildSeq;
+        
+        int id_;
+        Children children_;
+        
+        Node(int i =(rand() % MAX_ID),
+             uint c =pick_random_count())
+          : id_(i)
+          , children_(c) // populate with c random children
+          { }
+        
+        Node const&
+        child (uint i)
+          {
+            REQUIRE (i < children_.size());
+            return children_[i];
+          }
+      };
+    
+    
+    inline bool
+    have_equivalent_children (Node const& l, Node const& r)
+    {
+      if (l.children_.size() != r.children_.size()) return false;
+      for (uint i=0; i<l.children_.size(); ++i)
+        if (l.child(i) != r.child(i)) return false;
+      return true; 
+    }
+    
+    inline bool
+    operator== (Node const& l, Node const& r)
+    {
+      return l.id_ == r.id_
+          && have_equivalent_children(l,r);
+    }
+    
+    
+    struct VisitationData
+      {
+        int id;
+        int orientation;
+        
+        VisitationData(int refID)
+          : id(refID)
+          , orientation(HierarchyOrientationIndicator::NEUTRAL)
+          { }
+      };
+    
+    
+    /**
+     * This iteration "state core" type describes
+     * a sequence of numbers yet to be delivered.
+     */
+    class Exploration
+      {
+        Node::ChildSeq subject_;
+        HierarchyOrientationIndicator orientation_;
+        VisitationData currentVisitationView_;
+        
+      public:
+        Exploration(Node const& position)
+          : subject_(eachElm (position.children_))
+          , orientation_()
+          , currentVisitationView_(position.id_)
+          { }
+        
+        friend bool
+        checkPoint (Exploration const& st)
+        {
+          return bool(st.subject_);
+        }
+        
+        friend VisitationData&
+        yield (Exploration const& st)
+        {
+          return currentVisitationView_;
+        }
+        
+        friend void
+        iterNext (Exploration & st)
+        {
+          if (!checkPoint(st)) return;
+          ++st.subject_;
+        }
+      };
+    
+    
+    
+    /** 
+     * A straight ascending number sequence as basic test iterator.
+     * The tests will dress up this source sequence in various ways.
+     */
+    class NumberSequence
+      : public IterStateWrapper<uint, Exploration>
+      {
+          
+        public:
+          explicit
+          NumberSequence(uint end = 0)
+            : IterStateWrapper<uint,Exploration> (Exploration(0,end))
+            { }
+          NumberSequence(uint start, uint end)
+            : IterStateWrapper<uint,Exploration> (Exploration(start,end))
+            { }
+          
+          /** allow using NumberSequence in LinkedElements
+           * (intrusive single linked list) */
+          NumberSequence* next;
+      };
+    
+  
+  } //(End) test fixture
+  
+  
+  
+  
+  
+  /***************************************************************************
+   * @test cover various detail aspects regarding
+   *       - weakness of 
+   *       
+   * @see HashIndexed_test
+   * @see HierarchyOrientationIndicator
+   */
+  class HierarchyOrientationIndicator_test : public Test
+    {
+      
+      virtual void run (Arg)
+        {
+          demonstrate_weakness ();
+        }
+      
+      /** @test demonstrate a serious weakness of
+       * When...
+       * 
+       * This problem is especially dangerous when...
+       */
+      void demonstrate_weakness ( )
+        {
+          typedef XX hashFunction;
+          
+          CHECK (0 < collisions, "xx is expected to");
+        }
+      
+    };
+  
+  /** Register this test class... */
+  LAUNCHER(HierarchyOrientationIndicator_test, "unit common");
+  
+}} // namespace lib
diff --git a/tests/library/iter-explorer-test.cpp b/tests/library/iter-explorer-test.cpp
index a98ae02e2..9b4e136fc 100644
--- a/tests/library/iter-explorer-test.cpp
+++ b/tests/library/iter-explorer-test.cpp
@@ -506,7 +506,7 @@ namespace test{
           result = materialise (exploreIter(seq(0)) >>= explode);
           CHECK (result == "");
           
-          // also, n case the bound function yields an empty sequence, the result remains empty
+          // also, in case the bound function yields an empty sequence, the result remains empty
           result = materialise (exploreIter(seq(1)) >>= explode);
           CHECK (result == "");