diff --git a/src/include/cxz_darray_base.h b/src/include/cxz_darray_base.h
index a971cde..a6cc75f 100644
--- a/src/include/cxz_darray_base.h
+++ b/src/include/cxz_darray_base.h
@@ -19,7 +19,7 @@ namespace CNORXZ
     {
     public:
 	typedef T value_type;
-	typedef ConstContainerIndex const_iterator;
+	typedef DConstContainerIndex<value_type> const_iterator;
 
     protected:
 	RangePtr mRange;
@@ -65,7 +65,7 @@ namespace CNORXZ
 	typedef DArrayBase<T> DAB;
 	typedef DAB::value_type value_type;
 	typedef DAB::const_iterator const_iterator;
-	typedef DContainerIndex iterator;
+	typedef DContainerIndex<value_type> iterator;
 
 	using DAB::operator[];
 	using DAB::at;
diff --git a/src/include/dcontainer_index.h b/src/include/dcontainer_index.h
new file mode 100644
index 0000000..1a5c95c
--- /dev/null
+++ b/src/include/dcontainer_index.h
@@ -0,0 +1,58 @@
+
+#ifndef __dcontainer_index_h__
+#define __dcontainer_index_h__
+
+#include <cstdlib>
+#include <tuple>
+#include <memory>
+
+#include "ranges/range_base.h"
+#include "ranges/index_base.h"
+#include "mbase_def.h"
+#include "statics/static_for.h"
+#include "ranges/range_helper.h"
+
+namespace CNORXZ
+{
+    // Future DynamicIndex
+    class XIndexBase : public IndexInterface<XIndexBase,DType>
+    {
+    public:
+	DEFAULT_MEMBERS(XIndexBase);
+	// ...!!!
+    };
+
+    typedef std::shared_ptr<XIndexBase> XIndexPtr;
+    
+    // MultiIndex Wrapper:
+    template <class... Indices>
+    class XIndex
+    {
+    private:
+	std::shared_ptr<MultiIndex<Indices...>> mI;
+
+    public:
+	DEFAULT_MEMBERS(XIndex);
+	XIndex(const std::shared_ptr<MultiIndex<Indices...>>& i);
+
+	// ....!!!!
+    };
+    
+    template <typename T>
+    class DConstContainerIndex : public IndexInterface<DConstContainerIndex<T>,DType>
+    {
+    protected:
+	XIndexPtr mI;
+	const T* mCData = nullptr;
+	size_t mCPos = 0;
+    };
+
+    template <typename T>
+    class MDConstContainerIndex : public DConstContainerIndex<T>
+    {
+    private:
+	T* mData = nullptr;
+    };
+}
+
+#endif
diff --git a/src/include/ranges/dynamic_meta.h b/src/include/ranges/dynamic_meta.h
index a1a4d60..7e1fb1d 100644
--- a/src/include/ranges/dynamic_meta.h
+++ b/src/include/ranges/dynamic_meta.h
@@ -9,7 +9,7 @@
 
 namespace CNORXZ
 {
-
+    // DEP:
     typedef std::pair<const char*,size_t> DynamicMetaElem;
 
     template <size_t N>
@@ -25,6 +25,7 @@ namespace CNORXZ
 	}	    
     };
 
+    // DEP:
     template <>
     struct DynamicMetaSetter<0>
     {
@@ -38,6 +39,7 @@ namespace CNORXZ
     };
 
     
+    // DEP:
     class DynamicMetaT
     {
     private:
@@ -65,7 +67,94 @@ namespace CNORXZ
         const DynamicMetaElem& operator[](size_t pos) const;
     };
 
+    // NEW:
+    // Type Eraser:
+    class DType
+    {
+    public:
+	DEFAULT_MEMBERS(DType);
 
+	virtual std::string str() const = 0;
+	virtual bool operator==(const DType& in) const = 0;
+	virtual bool operator!=(const DType& in) const = 0;
+	virtual size_t size() const = 0;
+	virtual std::shared_ptr<DType> operator[](size_t pos) const = 0;
+    };
+
+    // NEW:
+    template <typename T>
+    class TypeWrapper : public DType
+    {
+    private:
+	T mD;
+
+    public:
+	TypeWrapper(const T& d) : mD(d) {}
+	DEFAULT_MEMBERS(TypeWrapper);
+	
+	virtual std::string str() const { return std::to_string(mD); /*wrapper*/ }
+	virtual bool operator==(const DType& in) const { return this->str() == in.str(); }
+	virtual bool operator!=(const DType& in) const { return this->str() != in.str(); }
+	virtual size_t size() const { return 1; }
+	virtual std::shared_ptr<DType> operator[](size_t pos) const { return nullptr; }
+    };
+
+    // NEW:
+    template <typename T>
+    class TypeRefWrapper : public DType
+    {
+    private:
+	const T* mD;
+
+    public:
+	TypeRefWrapper(const T* d) : mD(d) {}
+	DEFAULT_MEMBERS(TypeRefWrapper);
+
+	virtual std::string str() const { return to_string(*mD); /*wrapper*/ }
+	virtual bool operator==(const DType& in) const { return this->str() == in.str(); }
+	virtual bool operator!=(const DType& in) const { return this->str() != in.str(); }
+	virtual size_t size() const { return 1; }
+	virtual std::shared_ptr<DType> operator[](size_t pos) const { return nullptr; }
+    };
+
+    // NEW:
+    template <typename T>
+    class TypeWrapper<std::vector<T>> : public DType
+    {
+    private:
+	std::vector<T> mD;
+
+    public:
+	TypeWrapper(const std::vector<T>& d) : mD(d) {}
+	DEFAULT_MEMBERS(TypeWrapper);
+	
+	virtual std::string str() const { return to_string(mD); /* overload before!!! */ }
+	virtual bool operator==(const DType& in) const { return this->str() == in.str(); }
+	virtual bool operator!=(const DType& in) const { return this->str() != in.str(); }
+	virtual size_t size() const { return mD.size(); }
+	virtual std::shared_ptr<DType> operator[](size_t pos) const { return std::make_shared<TypeRefWrapper>(&mD[pos]); }
+    };
+
+    // NEW:
+    template <typename T>
+    class TypeRefWrapper<std::vector<T>> : public DType
+    {
+    private:
+	const std::vector<T>* mD;
+
+    public:
+	TypeWrapper(const std::vector<T>* d) : mD(d) {}
+	DEFAULT_MEMBERS(TypeWrapper);
+	
+	virtual std::string str() const { return to_string(*mD); /* overload before!!! */ }
+	virtual bool operator==(const DType& in) const { return this->str() == in.str(); }
+	virtual bool operator!=(const DType& in) const { return this->str() != in.str(); }
+	virtual size_t size() const { return mD->size(); }
+	virtual std::shared_ptr<DType> operator[](size_t pos) const { return std::make_shared<TypeRefWrapper>(&(*mD)[pos]); }
+    };
+
+    // SPECIALIZE: for std::array<T,N> and std::tuple<T...>
+    
 } // namespace CNORXZ
 
 #endif