anchor.diff:  // specific language governing permissions and limitations
   // under the License.
   
  -= Apache Tamaya -- Extension: Integration with etcd (Core OS)
  += Apache Tamaya -- Extension: User Filtering
   
   toc::[]
   
   
   [[Optional]]
  -== COnfiguration Filtering (Extension Module)
  +== User Filtering (Extension Module)
   === Overview
   
   The Tamaya filter module provides a simple singleton accessor that allows to explicitly add +PropertyFilter+ instances
   active on the current thread only. This can be very useful in many scenarios. Additionally this module adds
   standard filters that hide metadata entries when the full configuration map is accessed. When keys are accessed
  -explcitily no filtering is applied and everything is visible.
  +explicitily no filtering is applied and everything is visible.
   
   === Compatibility
   
  
positive.code: 
  === The Extensions Provided
  
  Tamaya Filter comes basically with 1 artifact:
  
  * The +org.apache.tamaya.filter.ConfigurationFilter+ provides several static methods to register +PropertyFilter+
  instances on the current thread.
  
negative.code: }
  -----------------------------------------------
  
  The +FilterContext+ is a simple structure just providing some handy accessors to the dynamic thread-local
  managed filters:
  
  [source, java]
  -----------------------------------------------
  public final class FilterContext implements PropertyFilter{
  
      public void addIncludes(PropertyFilter filter);
      public void addExcludes(int pos, PropertyFilter filter);
      public PropertyFilter removeFilter(int pos);
      public void clearFilters();
      public void setIncludes(PropertyFilter... filters);
      public void setExcludes(Collection<PropertyFilter> filters);
      public List<PropertyFilter> getFilters();
  
  }
  