1 files changed, 12 insertions, 6 deletions
diff --git a/c++/src/H5DataSet.h b/c++/src/H5DataSet.h
index a851d3d..490b575 100644
--- a/c++/src/H5DataSet.h
+++ b/c++/src/H5DataSet.h
@@ -70,24 +70,27 @@ class H5_DLLCPP DataSet : public AbstractDs {
         int iterateElems( void* buf, const DataType& type, const DataSpace& space, H5D_operator_t op, void* op_data = NULL );
 
 	// Retrieves the type of object that an object reference points to.
-	H5G_obj_t getObjType(void *ref, H5R_type_t ref_type) const;
+	H5G_obj_t getObjType(void *ref, H5R_type_t ref_type = H5R_OBJECT) const;
 
 	// Retrieves a dataspace with the region pointed to selected.
 	DataSpace getRegion(void *ref, H5R_type_t ref_type = H5R_DATASET_REGION) const;
 
 	// Creates a reference to a named Hdf5 object or to a dataset region
 	// in this object.
-	void* Reference(const char* name, DataSpace& dataspace, H5R_type_t ref_type = H5R_DATASET_REGION) const;
+	void* Reference(const char* name, DataSpace& dataspace, H5R_type_t ref_type = H5R_DATASET_REGION) const; // will be obsolete
 
 	// Creates a reference to a named Hdf5 object in this object.
-	void* Reference(const char* name) const;
-	void* Reference(const H5std_string& name) const;
+	void* Reference(const char* name) const; // will be obsolete
+	void* Reference(const H5std_string& name) const; // will be obsolete
+
+	// Opens a referenced dataset.
+	DataSet dereference(void* ref) const;
 
 	// Returns this class name
 	virtual H5std_string fromClass () const { return("DataSet"); }
 
-	// Creates a copy of an existing DataSet using its id.
-	DataSet(const hid_t existing_id);
+	// Creates a dataset by way of dereference.
+	DataSet(IdComponent& obj, void* ref);
 
 	// Default constructor.
 	DataSet();
@@ -95,6 +98,9 @@ class H5_DLLCPP DataSet : public AbstractDs {
 	// Copy constructor.
 	DataSet( const DataSet& original );
 
+	// Creates a copy of an existing DataSet using its id.
+	DataSet(const hid_t existing_id);
+
 	// Destructor: properly terminates access to this dataset.
 	virtual ~DataSet();