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diff --git a/PDContainer/include/HMultiSet.h b/PDContainer/include/HMultiSet.h
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+// *********************(c)*2004*********************>
+// -holzilib--holzilib--holzilib--holzilib--holzilib->
+// ++++PD-External++by+Georg+Holzmann++grh@gmx.at++++>
+//
+// PDContainer: 
+// this is a port of the containers from the C++ STL
+// (Standard Template Library)
+// for usage see the documentation and PD help files
+// for license see readme.txt
+//
+// HMultiSet.h
+
+
+#ifndef _h_multi_set_h__
+#define _h_multi_set_h__
+
+#include "include/SimpleBase.h"
+#include <set>
+
+using std::multiset;
+
+//---------------------------------------------------
+/* this is the class of the set
+ */
+class HMultiSet : 
+public SimpleBase< multiset<Element>, multiset<Element>::iterator >
+{
+
+ private:
+
+  /* Copy Construction is not allowed
+   */
+  HMultiSet(const HMultiSet &src)
+    { }
+
+  /* assignement operator is not allowed
+   */
+  const HMultiSet& operator = (const HMultiSet&)
+    { return *this; }
+
+ public:
+
+  /* Constructor
+   * no namespace
+   */
+  HMultiSet()
+    { dataname_ = "h_multiset"; }
+
+  /* Constructor
+   * with a namespace
+   */
+  HMultiSet(string h_namespace)
+    {
+      dataname_ = "h_multiset";
+      setNamespace(h_namespace);
+    }
+
+  /* Destructor
+   */  
+  virtual ~HMultiSet() { }
+
+  /* add an element
+   */
+  virtual void add(Element key)
+    {  data_[h_namespace_].insert(key);  }
+
+  /* look if the element is set
+   * returns how often this element was set 
+   * 0 if it isn't set
+   */
+  virtual int get(const Element &key) const
+    {  return data_[h_namespace_].count(key);  } 
+
+  /* removes an element from the container
+   */
+  virtual void remove(const Element &key) const
+      {  data_[h_namespace_].erase(key);  }
+};
+
+
+#endif   // _h_multi_set_h__