diff --git a/src/common/configrules.hpp b/src/common/configrules.hpp
index a1146283e..8363bf182 100644
--- a/src/common/configrules.hpp
+++ b/src/common/configrules.hpp
@@ -57,7 +57,6 @@
 #include "proc/mobject/session/track.hpp"
 #include "proc/asset/procpatt.hpp"
 #include "proc/asset/pipe.hpp"
-#include "proc/asset/track.hpp"
 #include "proc/asset/timeline.hpp"
 #include "proc/asset/sequence.hpp"
 
@@ -213,7 +212,6 @@ namespace lumiera {  ///////TODO: shouldn't that be namespace lib? or proc?
    *  rule based config query system
    */
   typedef lumiera::typelist::Types < mobject::session::Track
-                                   , asset::Track
                                    , asset::Pipe
                                    , const asset::ProcPatt
                                    , asset::Timeline
diff --git a/src/proc/asset/sequence.cpp b/src/proc/asset/sequence.cpp
index 77fc8e793..0090a62ef 100644
--- a/src/proc/asset/sequence.cpp
+++ b/src/proc/asset/sequence.cpp
@@ -25,7 +25,6 @@
 //#include "proc/mobject/session/track.hpp"
 //#include "proc/mobject/placement.hpp"
 //#include "proc/mobject/session/mobjectfactory.hpp"
-//#include "proc/asset/track.hpp"
 
 namespace asset {
   
diff --git a/src/proc/asset/struct-factory-impl.hpp b/src/proc/asset/struct-factory-impl.hpp
index 496600fc4..304432144 100644
--- a/src/proc/asset/struct-factory-impl.hpp
+++ b/src/proc/asset/struct-factory-impl.hpp
@@ -46,7 +46,6 @@
 #include "proc/asset/timeline.hpp"
 #include "proc/asset/sequence.hpp"
 #include "proc/asset/procpatt.hpp"
-#include "proc/asset/track.hpp"
 #include "proc/asset/pipe.hpp"
 
 #include "proc/asset/struct-scheme.hpp"
@@ -175,15 +174,6 @@ namespace asset {
   
   /* ============= specialisations =========================== */
   
-  template<>
-  inline Track* 
-  StructFactoryImpl::fabricate (const Query<Track>& caps)
-  {
-    TODO ("actually extract properties/capabilities from the query...");
-    TODO ("make sure AssetManager detects duplicates (currently 4/08 it doesn't)");       /////////////TICKET #102
-    return new Track (createIdent (caps));
-  }
-  
   template<>
   inline const ProcPatt* 
   StructFactoryImpl::fabricate (const Query<const ProcPatt>& caps)
diff --git a/src/proc/asset/struct.cpp b/src/proc/asset/struct.cpp
index 128745279..6bc9a9ff1 100644
--- a/src/proc/asset/struct.cpp
+++ b/src/proc/asset/struct.cpp
@@ -140,7 +140,6 @@ namespace asset {
 #include "proc/asset/struct.hpp"
 #include "proc/asset/struct-scheme.hpp"
 #include "proc/asset/procpatt.hpp"
-#include "proc/asset/track.hpp"
 #include "proc/asset/pipe.hpp"
 #include "proc/asset/timeline.hpp"
 #include "proc/asset/sequence.hpp"
@@ -149,7 +148,6 @@ namespace asset {
 namespace asset {
   
   template P<Pipe>     StructFactory::operator() (const Query<Pipe>& query);
-  template P<Track>    StructFactory::operator() (const Query<Track>& query);
   template PProcPatt   StructFactory::operator() (const Query<const ProcPatt>& query);
   template PTimeline   StructFactory::operator() (const Query<Timeline>& query);
   template PSequence   StructFactory::operator() (const Query<Sequence>& query);
diff --git a/src/proc/asset/timeline.cpp b/src/proc/asset/timeline.cpp
index bf692c7c0..65ad28d17 100644
--- a/src/proc/asset/timeline.cpp
+++ b/src/proc/asset/timeline.cpp
@@ -26,7 +26,6 @@
 //#include "proc/mobject/placement.hpp"
 //#include "proc/mobject/session/mobjectfactory.hpp"
 #include "proc/mobject/session/binding.hpp"
-//#include "proc/asset/track.hpp"
 
 namespace asset {
   
diff --git a/src/proc/asset/track.cpp b/src/proc/asset/track.cpp
deleted file mode 100644
index 0ef3e0b86..000000000
--- a/src/proc/asset/track.cpp
+++ /dev/null
@@ -1,37 +0,0 @@
-/*
-  Track  -  structural asset holding the configuration of a track in the Session
- 
-  Copyright (C)         Lumiera.org
-    2008,               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 "proc/asset/track.hpp"
-
-namespace asset
-  {
-  
-  /** @todo work out the details of track assets */
-  Track::Track (const Asset::Ident& idi)
-    : Struct (idi)
-  {
-    
-  }
-
-
-} // namespace asset
diff --git a/src/proc/asset/track.hpp b/src/proc/asset/track.hpp
deleted file mode 100644
index 6ba48e26e..000000000
--- a/src/proc/asset/track.hpp
+++ /dev/null
@@ -1,56 +0,0 @@
-/*
-  TRACK.hpp  -  structural asset used as global track identifier
- 
-  Copyright (C)         Lumiera.org
-    2008,               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.
- 
-*/
-
-
-#ifndef ASSET_TRACK_H
-#define ASSET_TRACK_H
-
-#include "proc/asset/struct.hpp"
-
-
-
-namespace asset {
-  
-  
-  /**
-   * Structural Asset used as a global identifier for placing
-   * media objects onto a given track. Not to be confused with the "track-MO",
-   * the MObject which becomes part of the high-level-model:
-   * In order actually to use a track within an Sequence, we need to attach a 
-   * Placement<mobject::session::Track> to the tree-of-tracks of this Sequence.
-   * Thus, we have one global track-identifier (this class here), but maybe
-   * several instances (placement of a track-MO) within various Sequences
-   */
-  class Track : public Struct
-    {
-    protected:
-      Track (const Asset::Ident& idi);
-      friend class StructFactoryImpl;
-    };
-    
-  
-  typedef P<const Track> PTrack;
-  
-  
-  
-} // namespace asset
-#endif
diff --git a/src/proc/assetmanager.cpp b/src/proc/assetmanager.cpp
index 90489674d..dcd18b7b7 100644
--- a/src/proc/assetmanager.cpp
+++ b/src/proc/assetmanager.cpp
@@ -234,7 +234,6 @@ namespace asset {
 #include "proc/asset/clip.hpp"  
 #include "proc/asset/proc.hpp"  
 #include "proc/asset/struct.hpp"  
-#include "proc/asset/track.hpp"  
 #include "proc/asset/pipe.hpp"  
 #include "proc/asset/meta.hpp"  
 #include "proc/asset/procpatt.hpp"  
@@ -256,7 +255,6 @@ namespace asset {
   template P<Asset>    AssetManager::wrap (const Asset& asset);
   template P<Media>    AssetManager::wrap (const Media& asset);
   template P<Clip>     AssetManager::wrap (const Clip&  asset);
-  template P<Track>    AssetManager::wrap (const Track& asset);
   template P<Pipe>     AssetManager::wrap (const Pipe&  asset);
   template P<ProcPatt> AssetManager::wrap (const ProcPatt& asset);
   template P<Timeline> AssetManager::wrap (const Timeline& asset);
diff --git a/src/proc/mobject/session/defsmanager.cpp b/src/proc/mobject/session/defsmanager.cpp
index a5bfe1dfc..c31044392 100644
--- a/src/proc/mobject/session/defsmanager.cpp
+++ b/src/proc/mobject/session/defsmanager.cpp
@@ -140,7 +140,6 @@ namespace session {
 
 #include "proc/asset/procpatt.hpp"
 #include "proc/asset/pipe.hpp"
-#include "proc/asset/track.hpp"
 #include "proc/asset/timeline.hpp"
 #include "proc/asset/sequence.hpp"
 #include "proc/mobject/session/track.hpp"
@@ -159,14 +158,11 @@ namespace session {
   using asset::PSequence;
   
   using mobject::session::Track;
-  using mobject::session::TrackAsset;
   using mobject::session::PTrack;
-  using mobject::session::PTrackAsset;
   
   template PPipe       DefsManager::operator() (const Query<Pipe>&);
   template PProcPatt   DefsManager::operator() (const Query<const ProcPatt>&);
   template PTrack      DefsManager::operator() (const Query<Track>&);
-  template PTrackAsset DefsManager::operator() (const Query<TrackAsset>&);
   template PTimeline   DefsManager::operator() (const Query<Timeline>&);
   template PSequence   DefsManager::operator() (const Query<Sequence>&);
   
diff --git a/src/proc/mobject/session/mobjectfactory.cpp b/src/proc/mobject/session/mobjectfactory.cpp
index 0b1373710..b7f639d9e 100644
--- a/src/proc/mobject/session/mobjectfactory.cpp
+++ b/src/proc/mobject/session/mobjectfactory.cpp
@@ -29,7 +29,6 @@
 #include "proc/mobject/session/label.hpp"
 #include "proc/mobject/session/binding.hpp"
 #include "proc/asset/clip.hpp"
-#include "proc/asset/track.hpp"
 #include "proc/asset/effect.hpp"
 
 namespace mobject {
@@ -82,14 +81,6 @@ namespace session {
     UNIMPLEMENTED ("build multichannel compound clip-MO");
   }
   
-  /** */ 
-  Placement<Track>
-  MObjectFactory::operator() (PTrackAsset& trackDef)           /////////////////////TICKET #581 kill kill kill the track-asset
-  {
-    TODO ("what needs to be registered when creating an Track-MO?");
-    return Placement<Track> (*new Track (trackDef), &deleterFunc);
-  }
-  
   /** fabricate a new track-MObject, using the given unique ID */ 
   Placement<Track>
   MObjectFactory::operator() (TrackID const& id)
diff --git a/src/proc/mobject/session/mobjectfactory.hpp b/src/proc/mobject/session/mobjectfactory.hpp
index 509975676..0d7aa6010 100644
--- a/src/proc/mobject/session/mobjectfactory.hpp
+++ b/src/proc/mobject/session/mobjectfactory.hpp
@@ -34,7 +34,6 @@ namespace asset {
   
   class Clip;
   class Media;
-  class Track;
   class Effect;
   class Sequence;
   
@@ -52,8 +51,6 @@ namespace session {
   class Label;
   class Binding;
   
-  typedef P<asset::Track> PTrackAsset;
-  
   class DefsManager;
   
   
@@ -69,8 +66,7 @@ namespace session {
       Placement<Root>   operator() (DefsManager&);
       Placement<Clip>   operator() (asset::Clip const&, asset::Media const&);
       Placement<Clip>   operator() (asset::Clip const&, vector<asset::Media const*>);
-      Placement<Track>  operator() (PTrackAsset&); ////////////////////////////////////////////////////TICKET #581 kill kill kill the track-asset
-      Placement<Track>  operator() (asset::EntryID<Track> const&);                         ////////////TICKET #581 use this one instead
+      Placement<Track>  operator() (asset::EntryID<Track> const&);
       Placement<Effect> operator() (asset::Effect const&);
       Placement<Label>  operator() (lib::Symbol);
       Placement<Binding>operator() (asset::PSequence const&);
diff --git a/src/proc/mobject/session/scope.cpp b/src/proc/mobject/session/scope.cpp
index 9dbf81365..7a3a9091b 100644
--- a/src/proc/mobject/session/scope.cpp
+++ b/src/proc/mobject/session/scope.cpp
@@ -29,7 +29,6 @@
 //#include "proc/mobject/session/track.hpp"
 //#include "proc/mobject/placement.hpp"
 //#include "proc/mobject/session/mobjectfactory.hpp"
-//#include "proc/asset/track.hpp"
 
 namespace mobject {
 namespace session {
diff --git a/src/proc/mobject/session/track.cpp b/src/proc/mobject/session/track.cpp
index f14bdbf12..8d7c5eb22 100644
--- a/src/proc/mobject/session/track.cpp
+++ b/src/proc/mobject/session/track.cpp
@@ -22,31 +22,17 @@
 
 
 #include "proc/mobject/session/track.hpp"
-#include "proc/asset/track.hpp"
 
 
 namespace mobject {
 namespace session {
   
-  /** new track-MO linked with the given asset::Track.
-   *  Initially, the reference (zero-point) time of this track
-   *  will be set to 0 
-   */
-  Track::Track (PTrackAsset& trackDef)
-    : start_(0),
-      trackDef_(trackDef)    /////////////////////TICKET #581 kill kill kill the track-asset
-  {
-    throwIfInvalid();
-  }
-  
-  
   /** create a new track-MObject based on the given unique ID.
    *  Initially, the reference (zero-point) time of this track
    *  will be set to 0 
    */
   Track::Track (TrackID const& trackID)
-    : start_(0),
-      trackDef_()            /////////////////////TICKET #581 kill kill kill the track-asset 
+    : start_(0)
     , id_(trackID)
   {
     throwIfInvalid();
@@ -56,7 +42,7 @@ namespace session {
   bool 
   Track::isValid()  const
   {
-    return bool(trackDef_);
+    return bool(id_.isValid());  ////////TODO anything more 'real' to check?
   }
   
   
diff --git a/src/proc/mobject/session/track.hpp b/src/proc/mobject/session/track.hpp
index 1f648346e..3b40922c0 100644
--- a/src/proc/mobject/session/track.hpp
+++ b/src/proc/mobject/session/track.hpp
@@ -29,21 +29,14 @@
 
 
 
-namespace asset { 
-  class Track;           /////////////////////TICKET #581 kill kill kill the track-asset
-  
-}
-
 namespace mobject {
 namespace session {     //////////////////////////////////////////////////////TICKET #637
     
     using lumiera::P;
     
     class Track;
-    typedef asset::Track TrackAsset;
     
     typedef P<Track> PTrack;
-    typedef P<TrackAsset> PTrackAsset;
 
 }}
     
@@ -81,11 +74,9 @@ namespace session {
     class Track : public Meta
       {
         Time start_;
-        PTrackAsset trackDef_;
         TrackID id_;
         
       protected:
-        Track (PTrackAsset&);           /////////////////////TICKET #581 kill kill kill the track-asset
         Track (TrackID const&);
         friend class MObjectFactory;