diff --git a/src/include/array/array_base.cc.h b/src/include/array/array_base.cc.h
index ca38cbf..fd9f3f4 100644
--- a/src/include/array/array_base.cc.h
+++ b/src/include/array/array_base.cc.h
@@ -69,7 +69,7 @@ namespace CNORXZ
     {
 	auto ai = itLexSave(begin);
 	auto aj = itLexSave(end);
-	return std::make_shared<CSlice>(subcube(ai,aj), this, ai.format(), ai.pos());
+	return std::make_shared<CSlice>(ai.prange(aj), this, ai.format(), ai.pos());
     }
 
     template <typename T>
diff --git a/src/include/ranges/crange.h b/src/include/ranges/crange.h
index 2eaab0e..430a507 100644
--- a/src/include/ranges/crange.h
+++ b/src/include/ranges/crange.h
@@ -47,6 +47,8 @@ namespace CNORXZ
 	CIndex& at(const SizeT& metaPos);
 	COpRoot<SizeT,CIndex> xpr(const Sptr<CIndex>& _this) const;
 
+	RangePtr prange(const CIndex& end) const;
+
 	SizeT deepFormat() const;
 	/*
 	template <class Index>
diff --git a/src/include/ranges/dindex.h b/src/include/ranges/dindex.h
index 560ca50..c40ab33 100644
--- a/src/include/ranges/dindex.h
+++ b/src/include/ranges/dindex.h
@@ -54,6 +54,7 @@ namespace CNORXZ
 	DType meta() const;
 	DIndex& at(const DType& meta);
 	DXpr<SizeT> xpr(const Sptr<DIndex>& _this) const;
+	RangePtr prange(const DIndex& end) const;
 	Vector<SizeT> deepFormat() const;
 	
 	DXpr<SizeT> ifor(const DXpr<SizeT>& xpr, std::function<SizeT(SizeT,SizeT)>&& f) const;
diff --git a/src/include/ranges/index_base.h b/src/include/ranges/index_base.h
index 7e280b2..d1454df 100644
--- a/src/include/ranges/index_base.h
+++ b/src/include/ranges/index_base.h
@@ -54,6 +54,8 @@ namespace CNORXZ
 	decltype(auto) meta() const { return THIS().meta(); }
 	I& at(const MetaType& meta) { return THIS().at(meta); }
 	decltype(auto) xpr(const Sptr<I>& _this) const { return THIS().xpr(_this); }
+
+	RangePtr prange(const IndexInterface& end) const { return THIS().prange(end.THIS()); }
 	/*
 	template <class Index>
 	decltype(auto) formatTo(const Sptr<Index>& ind) const { return ind->formatFrom(THIS()); }
diff --git a/src/include/ranges/mrange.cc.h b/src/include/ranges/mrange.cc.h
index e34a560..f8ef5bf 100644
--- a/src/include/ranges/mrange.cc.h
+++ b/src/include/ranges/mrange.cc.h
@@ -479,6 +479,22 @@ namespace CNORXZ
 	return mLexFormat;
     }
 
+    template <class FormatT, class... Indices>
+    RangePtr GMIndex<FormatT,Indices...>::prange(const MIndex<Indices...>& end) const
+    {
+	CXZ_ERROR("IMPLEMENT!!!");
+	return nullptr;
+	/*
+	return ifor<0,NI>
+	    ( [&](auto i) {
+		typedef typename std::remove_reference<decltype(mIPack[i])>::type::RangeType RangeT;
+		return std::dynamic_pointer_cast<RangeT>( mIPack[i]->prange( *end.pack()[i] ) );
+	        },
+		[](const auto&... e) { return mrange(e...); }
+	    );
+	*/
+    }
+
     template <class FormatT, class... Indices>
     auto GMIndex<FormatT,Indices...>::deepFormat() const
     {
diff --git a/src/include/ranges/mrange.h b/src/include/ranges/mrange.h
index c9a20b6..051afb1 100644
--- a/src/include/ranges/mrange.h
+++ b/src/include/ranges/mrange.h
@@ -81,6 +81,7 @@ namespace CNORXZ
 	const SPack<Indices...>& pack() const;
 	const auto& format() const;
 	const auto& lexFormat() const;
+	RangePtr prange(const MIndex<Indices...>& end) const;
 	auto deepFormat() const;
 	GMIndex& setFormat(const FormatT& bs);
 
diff --git a/src/include/ranges/prange.cc.h b/src/include/ranges/prange.cc.h
index 1efae1d..cfb4b18 100644
--- a/src/include/ranges/prange.cc.h
+++ b/src/include/ranges/prange.cc.h
@@ -123,6 +123,19 @@ namespace CNORXZ
 	}
     }
 
+    template <class IndexT>
+    RangePtr PIndex<IndexT>::prange(const PIndex<IndexT>& end) const
+    {
+	CXZ_ERROR("IMPLEMENT!!!");
+	return nullptr;
+    }
+
+    template <class IndexT>
+    decltype(auto) PIndex<IndexT>::deepFormat() const
+    {
+	return mOrig->deepFormat();
+    }
+
     template <class IndexT>
     String PIndex<IndexT>::stringMeta() const
     {
@@ -208,7 +221,7 @@ namespace CNORXZ
 	    }
 	    ++IB::mPos;
 	}
-	CXZ_ERROR("meta position '" << mOrig->meta() << "' not part of range");
+	CXZ_ERROR("meta position '" << toString(mOrig->meta()) << "' not part of range");
     }
 
     /***************************
@@ -327,22 +340,16 @@ namespace CNORXZ
 	return Vector<Uuid> { mRange->id() };
     }
 
-
     /****************************
      *   non-member functions   *
      ****************************/
-    
-    template <class I, typename M>
-    RangePtr prange(const IndexInterface<I,M>& begin, const IndexInterface<I,M>& end)
+
+    template <class RangeT>
+    RangePtr prange(const Sptr<RangeT>& range, const Vector<SizeT>& parts)
     {
-	Vector<SizeT> parts(end-begin);
-	const SizeT off = begin.pos();
-	for(auto i = begin.THIS(); i != end.THIS(); ++i){
-	    parts[i.pos()-off] = i.pos();
-	}
-	return begin.range()->partial(parts); // implement!!!!
-	//return PRangeFactory<typename I::RangeType>(begin.range(), parts).create();
+	return PRangeFactory<RangeT>(range,parts).create();
     }
+
 }
 
 #endif
diff --git a/src/include/ranges/prange.h b/src/include/ranges/prange.h
index 78961c8..7251bd7 100644
--- a/src/include/ranges/prange.h
+++ b/src/include/ranges/prange.h
@@ -41,6 +41,8 @@ namespace CNORXZ
 
 	template <SizeT I>
 	UPos stepSize(const IndexId<I>& id) const;
+	RangePtr prange(const PIndex<IndexT>& end) const;
+	decltype(auto) deepFormat() const;
 
 	String stringMeta() const;
 	decltype(auto) meta() const;
@@ -118,8 +120,8 @@ namespace CNORXZ
 	Vector<SizeT> mParts;
     };
 
-    template <class I, typename M>
-    RangePtr prange(const IndexInterface<I,M>& begin, const IndexInterface<I,M>& end);
+    template <class RangeT>
+    RangePtr prange(const Sptr<RangeT>& range, const Vector<SizeT>& parts);
     
 } // namespace CNORXZ
 
diff --git a/src/include/ranges/srange.cc.h b/src/include/ranges/srange.cc.h
index d5b1faa..5d27de6 100644
--- a/src/include/ranges/srange.cc.h
+++ b/src/include/ranges/srange.cc.h
@@ -141,6 +141,13 @@ namespace CNORXZ
 	return coproot(mMetaPtr,_this);
     }
 
+    template <typename MetaT, SizeT S>
+    RangePtr SIndex<MetaT,S>::prange(const SIndex<MetaType,S>& end) const
+    {
+	CXZ_ERROR("IMPLEMENT!!!");
+	return nullptr;
+    }
+    
     template <typename MetaT, SizeT S>
     SizeT SIndex<MetaT,S>::deepFormat() const
     {
diff --git a/src/include/ranges/srange.h b/src/include/ranges/srange.h
index 46feea8..9aafb39 100644
--- a/src/include/ranges/srange.h
+++ b/src/include/ranges/srange.h
@@ -48,6 +48,7 @@ namespace CNORXZ
 	SIndex& at(const MetaT& metaPos);
 	decltype(auto) xpr(const Sptr<SIndex<MetaType,S>>& _this) const;
 
+	RangePtr prange(const SIndex<MetaType,S>& end) const;
 	SizeT deepFormat() const;
 	/*
 	template <class Index>
diff --git a/src/include/ranges/urange.cc.h b/src/include/ranges/urange.cc.h
index 82825c8..56f2fbb 100644
--- a/src/include/ranges/urange.cc.h
+++ b/src/include/ranges/urange.cc.h
@@ -6,6 +6,7 @@
 #include <algorithm>
 
 #include "urange.h"
+#include "prange.h"
 #include "index_mul.h"
 #include "xpr/for.h"
 #include "operation/op_types.h"
@@ -17,136 +18,148 @@ namespace CNORXZ
      *    UIndex     *	     
      *****************/
 
-    template <typename MetaType>
-    UIndex<MetaType>::UIndex(const RangePtr& range, SizeT pos) :
-	IndexInterface<UIndex<MetaType>,MetaType>(pos),
+    template <typename MetaT>
+    UIndex<MetaT>::UIndex(const RangePtr& range, SizeT pos) :
+	IndexInterface<UIndex<MetaT>,MetaT>(pos),
 	mRangePtr(rangeCast<RangeType>(range)),
 	mMetaPtr(&mRangePtr->get(0))
     {}
 
-    template <typename MetaType>
-    UIndex<MetaType>& UIndex<MetaType>::operator=(size_t lexpos)
+    template <typename MetaT>
+    UIndex<MetaT>& UIndex<MetaT>::operator=(size_t lexpos)
     {
 	IB::mPos = lexpos;
 	return *this;
     }
 
-    template <typename MetaType>
-    UIndex<MetaType>& UIndex<MetaType>::operator++()
+    template <typename MetaT>
+    UIndex<MetaT>& UIndex<MetaT>::operator++()
     {
 	++IB::mPos;
 	return *this;
     }
 
-    template <typename MetaType>
-    UIndex<MetaType>& UIndex<MetaType>::operator--()
+    template <typename MetaT>
+    UIndex<MetaT>& UIndex<MetaT>::operator--()
     {
 	--IB::mPos;
 	return *this;
     }
 
-    template <typename MetaType>
-    UIndex<MetaType> UIndex<MetaType>::operator+(Int n) const
+    template <typename MetaT>
+    UIndex<MetaT> UIndex<MetaT>::operator+(Int n) const
     {
 	return UIndex(mRangePtr, IB::mPos + n);
     }
     
-    template <typename MetaType>
-    UIndex<MetaType> UIndex<MetaType>::operator-(Int n) const
+    template <typename MetaT>
+    UIndex<MetaT> UIndex<MetaT>::operator-(Int n) const
     {
 	return UIndex(mRangePtr, IB::mPos - n);
     }
     
-    template <typename MetaType>
-    UIndex<MetaType>& UIndex<MetaType>::operator+=(Int n)
+    template <typename MetaT>
+    UIndex<MetaT>& UIndex<MetaT>::operator+=(Int n)
     {
 	IB::mPos += n;
 	return *this;
     }
     
-    template <typename MetaType>
-    UIndex<MetaType>& UIndex<MetaType>::operator-=(Int n)
+    template <typename MetaT>
+    UIndex<MetaT>& UIndex<MetaT>::operator-=(Int n)
     {
 	IB::mPos -= n;
 	return *this;
     }
 
-    template <typename MetaType>
-    SizeT UIndex<MetaType>::lex() const
+    template <typename MetaT>
+    SizeT UIndex<MetaT>::lex() const
     {
 	return IB::mPos;
     }
     
-    template <typename MetaType>
-    UPos UIndex<MetaType>::pmax() const
+    template <typename MetaT>
+    UPos UIndex<MetaT>::pmax() const
     {
 	return UPos(mRangePtr->size());
     }
 
-    template <typename MetaType>
-    UPos UIndex<MetaType>::lmax() const
+    template <typename MetaT>
+    UPos UIndex<MetaT>::lmax() const
     {
 	return UPos(mRangePtr->size());
     }
 
-    template <typename MetaType>
-    IndexId<0> UIndex<MetaType>::id() const
+    template <typename MetaT>
+    IndexId<0> UIndex<MetaT>::id() const
     {
 	return IndexId<0>(this->ptrId());
     }
 
-    template <typename MetaType>
-    const MetaType& UIndex<MetaType>::operator*() const
+    template <typename MetaT>
+    const MetaT& UIndex<MetaT>::operator*() const
     {
 	return mMetaPtr[IB::mPos];
     }
     
-    template <typename MetaType>
-    String UIndex<MetaType>::stringMeta() const
+    template <typename MetaT>
+    String UIndex<MetaT>::stringMeta() const
     {
 	return toString(this->meta());
     }
     
-    template <typename MetaType>
-    const MetaType& UIndex<MetaType>::meta() const
+    template <typename MetaT>
+    const MetaT& UIndex<MetaT>::meta() const
     {
 	return mMetaPtr[IB::mPos];
     }
     
-    template <typename MetaType>
-    UIndex<MetaType>& UIndex<MetaType>::at(const MetaType& metaPos)
+    template <typename MetaT>
+    UIndex<MetaT>& UIndex<MetaT>::at(const MetaT& metaPos)
     {
 	(*this) = mRangePtr->getMeta(metaPos);
 	return *this;
     }
 
-    template <typename MetaType>
-    decltype(auto) UIndex<MetaType>::xpr(const Sptr<UIndex<MetaType>>& _this) const
+    template <typename MetaT>
+    decltype(auto) UIndex<MetaT>::xpr(const Sptr<UIndex<MetaT>>& _this) const
     {
 	return coproot(mMetaPtr,_this);
     }
 
-    template <typename MetaType>
-    SizeT UIndex<MetaType>::deepFormat() const
+    template <typename MetaT>
+    RangePtr UIndex<MetaT>::prange(const UIndex<MetaT>& end) const
+    {
+	CXZ_ASSERT(end > *this, "got end index position smaller than begin index position");
+	const SizeT beginPos = lex();
+	Vector<SizeT> parts(end.lex()-beginPos);
+	for(auto i = *this; i != end; ++i){
+	    parts[i.lex()-beginPos] = i.lex();
+	}
+	return CNORXZ::prange(mRangePtr, parts);
+    }
+
+    template <typename MetaT>
+    SizeT UIndex<MetaT>::deepFormat() const
     {
 	return 1;
     }
 
-    template <typename MetaType>
-    size_t UIndex<MetaType>::dim() const // = 1
+    template <typename MetaT>
+    size_t UIndex<MetaT>::dim() const // = 1
     {
 	return 1;
     }
 
-    template <typename MetaType>
-    Sptr<URange<MetaType>> UIndex<MetaType>::range() const
+    template <typename MetaT>
+    Sptr<URange<MetaT>> UIndex<MetaT>::range() const
     {
 	return mRangePtr;
     }
 
-    template <typename MetaType>
+    template <typename MetaT>
     template <SizeT I>
-    decltype(auto) UIndex<MetaType>::stepSize(const IndexId<I>& id) const
+    decltype(auto) UIndex<MetaT>::stepSize(const IndexId<I>& id) const
     {
 	if constexpr(I != 0){
 	    return SPos<0>();
@@ -156,34 +169,34 @@ namespace CNORXZ
 	}
     }
     /*
-    template <typename MetaType>
+    template <typename MetaT>
     template <class Index>
-    decltype(auto) UIndex<MetaType>::formatFrom(const Index& ind) const
+    decltype(auto) UIndex<MetaT>::formatFrom(const Index& ind) const
     {
 	return *this;
     }
 
-    template <typename MetaType>
+    template <typename MetaT>
     template <class Index>
-    decltype(auto) UIndex<MetaType>::slice(const Sptr<Index>& ind) const
+    decltype(auto) UIndex<MetaT>::slice(const Sptr<Index>& ind) const
     {
 	if(ind != nullptr){
 	    if(ind->dim() != 0) {
-		return Sptr<UIndex<MetaType>>();
+		return Sptr<UIndex<MetaT>>();
 	    }
 	}
-	return std::make_shared<UIndex<MetaType>>(*this);
+	return std::make_shared<UIndex<MetaT>>(*this);
     }
     */
-    template <typename MetaType>
+    template <typename MetaT>
     template <class Xpr, class F>
-    decltype(auto) UIndex<MetaType>::ifor(const Xpr& xpr, F&& f) const
+    decltype(auto) UIndex<MetaT>::ifor(const Xpr& xpr, F&& f) const
     {
 	return For<0,Xpr,F>(this->pmax().val(), this->id(), xpr, std::forward<F>(f));
     }
     
-    template <typename MetaType, class I1>
-    decltype(auto) operator*(const Sptr<UIndex<MetaType>>& a, const Sptr<I1>& b)
+    template <typename MetaT, class I1>
+    decltype(auto) operator*(const Sptr<UIndex<MetaT>>& a, const Sptr<I1>& b)
     {
 	return iptrMul(a, b);
     }
@@ -192,32 +205,32 @@ namespace CNORXZ
      *   URangeFactory    *
      **********************/
 
-    template <typename MetaType>
-    URangeFactory<MetaType>::URangeFactory(const Vector<MetaType>& space) :
+    template <typename MetaT>
+    URangeFactory<MetaT>::URangeFactory(const Vector<MetaT>& space) :
 	mSpace(space) {}
 
-    template <typename MetaType>
-    URangeFactory<MetaType>::URangeFactory(Vector<MetaType>&& space) :
+    template <typename MetaT>
+    URangeFactory<MetaT>::URangeFactory(Vector<MetaT>&& space) :
 	mSpace(space) {}
 
-    template <typename MetaType>
-    URangeFactory<MetaType>::URangeFactory(const Vector<MetaType>& space, const RangePtr& ref) :
+    template <typename MetaT>
+    URangeFactory<MetaT>::URangeFactory(const Vector<MetaT>& space, const RangePtr& ref) :
 	mSpace(space), mRef(ref) {}
 
-    template <typename MetaType>
-    URangeFactory<MetaType>::URangeFactory(Vector<MetaType>&& space, const RangePtr& ref) :
+    template <typename MetaT>
+    URangeFactory<MetaT>::URangeFactory(Vector<MetaT>&& space, const RangePtr& ref) :
 	mSpace(space), mRef(ref) {}
 
-    template <typename MetaType>
-    void URangeFactory<MetaType>::make()
+    template <typename MetaT>
+    void URangeFactory<MetaT>::make()
     {
-	const auto& info = typeid(URange<MetaType>);
+	const auto& info = typeid(URange<MetaT>);
 	if(mRef != nullptr) {
 	    mProd = this->fromCreated(info, {mRef->id()});
 	}
 	if(mProd == nullptr){
-	    RangePtr key = mProd = std::shared_ptr<URange<MetaType>>
-		( new URange<MetaType>( std::move(mSpace) ) );
+	    RangePtr key = mProd = std::shared_ptr<URange<MetaT>>
+		( new URange<MetaT>( std::move(mSpace) ) );
 	    if(mRef != nullptr) { key = mRef; }
 	    this->addToCreated(info, { key->id() }, mProd);
 	}
@@ -227,88 +240,88 @@ namespace CNORXZ
      *   URange    *
      ***************/
     
-    template <typename MetaType>
-    URange<MetaType>::URange(const Vector<MetaType>& space) :
-	RangeInterface<URange<MetaType>>(),
+    template <typename MetaT>
+    URange<MetaT>::URange(const Vector<MetaT>& space) :
+	RangeInterface<URange<MetaT>>(),
 	mSpace(space)
     {
-	std::sort(mSpace.begin(), mSpace.end(), std::less<MetaType>());
+	std::sort(mSpace.begin(), mSpace.end(), std::less<MetaT>());
 	auto itdupl = std::adjacent_find(mSpace.begin(), mSpace.end());
 	CXZ_ASSERT(itdupl == mSpace.end(), "found duplicate: " << *itdupl);
     }
 
-    template <typename MetaType>
-    URange<MetaType>::URange(Vector<MetaType>&& space) :
-	RangeInterface<URange<MetaType>>(),
+    template <typename MetaT>
+    URange<MetaT>::URange(Vector<MetaT>&& space) :
+	RangeInterface<URange<MetaT>>(),
 	mSpace(space)
     {
-	std::sort(mSpace.begin(), mSpace.end(), std::less<MetaType>());
+	std::sort(mSpace.begin(), mSpace.end(), std::less<MetaT>());
 	auto itdupl = std::adjacent_find(mSpace.begin(), mSpace.end());
 	CXZ_ASSERT(itdupl == mSpace.end(), "found duplicate: " << toString(*itdupl));
     }
 
         
-    template <typename MetaType>
-    const MetaType& URange<MetaType>::get(SizeT pos) const
+    template <typename MetaT>
+    const MetaT& URange<MetaT>::get(SizeT pos) const
     {
 	return mSpace[pos];
     }
 
-    template <typename MetaType>
-    const MetaType* URange<MetaType>::get() const
+    template <typename MetaT>
+    const MetaT* URange<MetaT>::get() const
     {
 	return mSpace.data();
     }
 
-    template <typename MetaType>
-    SizeT URange<MetaType>::getMeta(const MetaType& meta) const
+    template <typename MetaT>
+    SizeT URange<MetaT>::getMeta(const MetaT& meta) const
     {
 	auto b = mSpace.begin();
 	auto e = mSpace.end();
-	return std::lower_bound(b, e, meta, std::less<MetaType>()) - b;
+	return std::lower_bound(b, e, meta, std::less<MetaT>()) - b;
     }
 
-    template <typename MetaType>
-    SizeT URange<MetaType>::size() const
+    template <typename MetaT>
+    SizeT URange<MetaT>::size() const
     {
 	return mSpace.size();
     }
 
-    template <typename MetaType>
-    SizeT URange<MetaType>::dim() const
+    template <typename MetaT>
+    SizeT URange<MetaT>::dim() const
     {
 	return 1;
     }
 
-    template <typename MetaType>
-    String URange<MetaType>::stringMeta(SizeT pos) const
+    template <typename MetaT>
+    String URange<MetaT>::stringMeta(SizeT pos) const
     {
 	return toString(this->get(pos));
     }
     
-    template <typename MetaType>
-    const TypeInfo& URange<MetaType>::type() const
+    template <typename MetaT>
+    const TypeInfo& URange<MetaT>::type() const
     {
-	return typeid(URange<MetaType>);
+	return typeid(URange<MetaT>);
     }
     
-    template <typename MetaType>
-    const TypeInfo& URange<MetaType>::metaType() const
+    template <typename MetaT>
+    const TypeInfo& URange<MetaT>::metaType() const
     {
-	return typeid(MetaType);
+	return typeid(MetaT);
     }
 
-    template <typename MetaType>
-    RangePtr URange<MetaType>::extend(const RangePtr& r) const
+    template <typename MetaT>
+    RangePtr URange<MetaT>::extend(const RangePtr& r) const
     {
-	auto rx = rangeCast<URange<MetaType>>(r);
+	auto rx = rangeCast<URange<MetaT>>(r);
 	auto space = mSpace;
 	space.insert(space.end(), rx->mSpace.begin(), rx->mSpace.end());
-	return URangeFactory<MetaType>( space ).create();
+	return URangeFactory<MetaT>( space ).create();
     }
 
-    template <typename MetaType>
-    Vector<Uuid> URange<MetaType>::key() const
+    template <typename MetaT>
+    Vector<Uuid> URange<MetaT>::key() const
     {
 	return Vector<Uuid> { this->id() };
     }
@@ -317,30 +330,30 @@ namespace CNORXZ
      *   Range Casts   *
      *******************/
 
-    template <typename MetaType>
+    template <typename MetaT>
     struct URangeCast
     {
 	template <typename T>
-	static inline Sptr<URange<MetaType>> transform(const RangePtr& r)
+	static inline Sptr<URange<MetaT>> transform(const RangePtr& r)
 	{
 	    if(r->type() == typeid(URange<T>)){
 		auto rr = std::dynamic_pointer_cast<URange<T>>(r);
-		Vector<MetaType> v(rr->size());
+		Vector<MetaT> v(rr->size());
 		std::transform(rr->begin(), rr->end(), v.begin(),
-			       [](const T& x) { return static_cast<MetaType>(x); } );
-		return std::dynamic_pointer_cast<URange<MetaType>>
-		    ( URangeFactory<MetaType>(std::move(v)).create() );
+			       [](const T& x) { return static_cast<MetaT>(x); } );
+		return std::dynamic_pointer_cast<URange<MetaT>>
+		    ( URangeFactory<MetaT>(std::move(v)).create() );
 	    }
 	    else {
 		return nullptr;
 	    }
 	}
 	
-	static inline Sptr<URange<MetaType>> cast(const RangePtr& r)
+	static inline Sptr<URange<MetaT>> cast(const RangePtr& r)
 	{
-	    static_assert(std::is_fundamental<MetaType>::value, "got non-fundamental type");
+	    static_assert(std::is_fundamental<MetaT>::value, "got non-fundamental type");
 	    CXZ_ASSERT(r->dim() == 1, "range cast into URange<Int>: source range must have dim = 1, got " << r->dim());
-	    Sptr<URange<MetaType>> o = nullptr;
+	    Sptr<URange<MetaT>> o = nullptr;
 	    o = transform<SizeT>(r); if(o) return o;
 	    o = transform<Int>(r); if(o) return o;
 	    o = transform<LInt>(r); if(o) return o;
@@ -415,11 +428,11 @@ namespace CNORXZ
     };
 
     
-    template <typename MetaType>
-    Sptr<URange<MetaType>> RangeCast<URange<MetaType>>::func(const RangePtr& r)
+    template <typename MetaT>
+    Sptr<URange<MetaT>> RangeCast<URange<MetaT>>::func(const RangePtr& r)
     {
-	if constexpr(std::is_fundamental<MetaType>::value or is_vector<MetaType>::value){
-	    return URangeCast<MetaType>::cast(r);
+	if constexpr(std::is_fundamental<MetaT>::value or is_vector<MetaT>::value){
+	    return URangeCast<MetaT>::cast(r);
 	}
 	else {
 	    CXZ_ERROR("no range cast available for input range '" << r->type().name() << "'");
diff --git a/src/include/ranges/urange.h b/src/include/ranges/urange.h
index f6ef6f1..92aeb78 100644
--- a/src/include/ranges/urange.h
+++ b/src/include/ranges/urange.h
@@ -55,6 +55,8 @@ namespace CNORXZ
 	UIndex& at(const MetaT& metaPos);
 	decltype(auto) xpr(const Sptr<UIndex<MetaType>>& _this) const;
 
+	RangePtr prange(const UIndex<MetaType>& end) const;
+
 	SizeT deepFormat() const;
 	/*
 	template <class Index>
@@ -94,12 +96,13 @@ namespace CNORXZ
 	RangePtr mRef;
     };
 
-    template <typename MetaType>
-    class URange : public RangeInterface<URange<MetaType>>
+    template <typename MetaT>
+    class URange : public RangeInterface<URange<MetaT>>
     {
     public:
 	typedef RangeBase RB;
-	typedef UIndex<MetaType> IndexType;
+	typedef UIndex<MetaT> IndexType;
+	typedef MetaT MetaType;
 	
 	friend URangeFactory<MetaType>;
 
diff --git a/src/include/ranges/xindex.cc.h b/src/include/ranges/xindex.cc.h
index 65df9e8..c9b44e6 100644
--- a/src/include/ranges/xindex.cc.h
+++ b/src/include/ranges/xindex.cc.h
@@ -127,6 +127,12 @@ namespace CNORXZ
 	return mI->stepSize(id);
     }
 
+    template <class Index, typename Meta>
+    RangePtr XIndex<Index,Meta>::prange(const XIndexPtr& end) const
+    {
+	return mI->prange( *std::dynamic_pointer_cast<Index>(end) );
+    }
+
     template <class Index, typename Meta>
     Vector<SizeT> XIndex<Index,Meta>::deepFormat() const
     {
diff --git a/src/include/ranges/xindex.h b/src/include/ranges/xindex.h
index 93bb23d..ce79f44 100644
--- a/src/include/ranges/xindex.h
+++ b/src/include/ranges/xindex.h
@@ -38,6 +38,7 @@ namespace CNORXZ
 	virtual SizeT dim() const = 0;
 	virtual RangePtr range() const = 0;
 	virtual UPos stepSize(const IndexId<0>& id) const = 0;
+	virtual RangePtr prange(const XIndexPtr& end) const = 0;
 	virtual Vector<SizeT> deepFormat() const = 0;
 	//virtual Vector<XIndexPtr> pack() const = 0;
 	//virtual Vector<SizeT> format() const = 0;
@@ -92,6 +93,7 @@ namespace CNORXZ
 	virtual SizeT dim() const override final;
 	virtual RangePtr range() const override final;
 	virtual UPos stepSize(const IndexId<0>& id) const override final;
+	virtual RangePtr prange(const XIndexPtr& end) const override final;
 	virtual Vector<SizeT> deepFormat() const override final;
 	//virtual Vector<XIndexPtr> pack() const override final;
 	//virtual Vector<SizeT> format() const override final;
diff --git a/src/include/ranges/yrange.h b/src/include/ranges/yrange.h
index 16b476c..6cfeb71 100644
--- a/src/include/ranges/yrange.h
+++ b/src/include/ranges/yrange.h
@@ -66,6 +66,7 @@ namespace CNORXZ
 	YIndex& operator()();
 
 	const DPack& pack() const;
+	RangePtr prange(const YIndex& end) const;
 	Vector<SizeT> deepFormat() const;
 	const YFormat& format() const;
 	const YFormat& lexFormat() const;
@@ -160,10 +161,7 @@ namespace CNORXZ
 	static Sptr<YRange> func(const RangePtr& r);
     };
 
-    template <>
-    RangePtr prange(const IndexInterface<YIndex,Vector<DType>>& begin,
-		    const IndexInterface<YIndex,Vector<DType>>& end);
-    
+   
 }
 
 #endif
diff --git a/src/lib/ranges/crange.cc b/src/lib/ranges/crange.cc
index f3acd45..a42f413 100644
--- a/src/lib/ranges/crange.cc
+++ b/src/lib/ranges/crange.cc
@@ -1,5 +1,6 @@
 
 #include "ranges/ranges.h"
+#include "ranges/prange.h"
 #include "operation/operation.h"
 
 namespace CNORXZ
@@ -115,6 +116,17 @@ namespace CNORXZ
 	}
 	return coproot(m.data(), _this);
     }
+
+    RangePtr CIndex::prange(const CIndex& end) const
+    {
+	CXZ_ASSERT(end > *this, "got end index position smaller than begin index position");
+	const SizeT beginPos = lex();
+	Vector<SizeT> parts(end.lex() - beginPos);
+	for(auto i = *this; i != end; ++i){
+	    parts[i.lex()-beginPos] = i.lex();
+	}
+	return CNORXZ::prange(mRangePtr, parts);
+    }
     
     SizeT CIndex::deepFormat() const
     {
diff --git a/src/lib/ranges/dindex.cc b/src/lib/ranges/dindex.cc
index 972042f..9188c53 100644
--- a/src/lib/ranges/dindex.cc
+++ b/src/lib/ranges/dindex.cc
@@ -167,6 +167,11 @@ namespace CNORXZ
 	return mI->xpr(_this->xptr());
     }
 
+    RangePtr DIndex::prange(const DIndex& end) const
+    {
+	return mI->prange( end.xptr() );
+    }
+
     Vector<SizeT> DIndex::deepFormat() const
     {
 	return mI->deepFormat();
diff --git a/src/lib/ranges/yrange.cc b/src/lib/ranges/yrange.cc
index 082fc22..cae29b8 100644
--- a/src/lib/ranges/yrange.cc
+++ b/src/lib/ranges/yrange.cc
@@ -368,6 +368,17 @@ namespace CNORXZ
 	return mIs;
     }
 
+    RangePtr YIndex::prange(const YIndex& end) const
+    {
+	CXZ_ASSERT(dim() == end.dim(), "end index has different number of dimensions ("
+		   << end.dim() << ") than begin index (" << dim() << ")");
+	Vector<RangePtr> v(dim());
+	for(SizeT i = 0; i != dim(); ++i){
+	    v[i] = mIs[i]->prange( end.pack()[i] );
+	}
+	return YRangeFactory(v).create();
+    }
+
     Vector<SizeT> YIndex::deepFormat() const
     {
 	Vector<Vector<SizeT>> dfv(mIs.size());
@@ -561,17 +572,4 @@ namespace CNORXZ
 	return std::dynamic_pointer_cast<YRange>( YRangeFactory({r}).create() );
     }
 
-    template <>
-    RangePtr prange(const IndexInterface<YIndex,Vector<DType>>& begin,
-		    const IndexInterface<YIndex,Vector<DType>>& end)
-    {
-	CXZ_WARNING("YRange specialization"); // test
-	const SizeT dim = begin.range()->dim();
-	Vector<RangePtr> v(dim);
-	for(SizeT i = 0; i != dim; ++i){
-	    v[i] = prange( DIndex(begin.THIS().pack()[i]), DIndex(end.THIS().pack()[i]) );
-	}
-	return YRangeFactory(v).create();
-    }
-
 }