Index: trunk/Mars/mcore/fits.h
===================================================================
--- trunk/Mars/mcore/fits.h	(revision 18593)
+++ trunk/Mars/mcore/fits.h	(revision 18594)
@@ -491,4 +491,9 @@
     }
 
+    // Public for the root dictionary
+    typedef std::pair<void*, Table::Column> Address;
+    typedef std::vector<Address> Addresses;
+    typedef std::unordered_map<std::string, void*> Pointers;
+
 protected:
     std::ofstream fCopy;
@@ -497,10 +502,7 @@
     Table fTable;
 
-    typedef std::pair<void*, Table::Column> Address;
-    typedef std::vector<Address> Addresses;
     //map<void*, Table::Column> fAddresses;
     Addresses fAddresses;
 
-    typedef std::unordered_map<std::string, void*> Pointers;
     Pointers fPointers;
 
Index: trunk/Mars/mcore/zofits.h
===================================================================
--- trunk/Mars/mcore/zofits.h	(revision 18593)
+++ trunk/Mars/mcore/zofits.h	(revision 18594)
@@ -988,4 +988,6 @@
         // data layout related stuff
         /// Regular columns augmented with compression informations
+
+    public: // Public for the root dictionary
         struct CompressedColumn
         {
@@ -999,4 +1001,6 @@
             FITS::Compression block_head;  ///< the compression data associated with that column
         };
+
+    protected:
         std::vector<CompressedColumn> fRealColumns;     ///< Vector hosting the columns of the file
         uint32_t                      fRealRowWidth;    ///< Width in bytes of one uncompressed row
Index: trunk/Mars/mfileio/MWriteFitsFile.h
===================================================================
--- trunk/Mars/mfileio/MWriteFitsFile.h	(revision 18593)
+++ trunk/Mars/mfileio/MWriteFitsFile.h	(revision 18594)
@@ -152,4 +152,5 @@
    void        SetupHeaderKeys(MRawRunHeader &header);
 
+public:
    //Header keys related stuff
    template<typename _T>
@@ -184,5 +185,4 @@
    }
 
-public:
    template<typename _T>
    bool SetHeaderKey(const std::string& key,