diff --git a/samples/key-test.cpp b/samples/key-test.cpp
index 7ce78f38..807f98da 100644
--- a/samples/key-test.cpp
+++ b/samples/key-test.cpp
@@ -14,6 +14,7 @@
 
 #include <iostream>
 #include <string>
+#include <cstring>
 
 using namespace Exiv2;
 
@@ -59,13 +60,13 @@ int main()
     }
     // ifdName
     tc += 1;
-    if (std::string(ek.ifdName()) != "Iop") {
+    if (std::string(ExifTags::ifdName(ek.groupName())) != "Iop") {
         std::cout << "Testcase failed (ifdName: " << std::endl;
         rc += 1;
     }
     // sectionName
     tc += 1;
-    if (ek.sectionName() != "Interoperability") {
+    if (strcmp(ExifTags::sectionName(ek), "Interoperability") != 0) {
         std::cout << "Testcase failed (sectionName)" << std::endl;
         rc += 1;
     }
@@ -109,13 +110,13 @@ int main()
     }
     // ifdName
     tc += 1;
-    if (std::string(ek2.ifdName()) != "Iop") {
+    if (std::string(ExifTags::ifdName(ek2.groupName())) != "Iop") {
         std::cout << "Testcase failed (ifdName: " << std::endl;
         rc += 1;
     }
     // sectionName
     tc += 1;
-    if (ek2.sectionName() != "Interoperability") {
+    if (strcmp(ExifTags::sectionName(ek2), "Interoperability") != 0) {
         std::cout << "Testcase failed (sectionName)" << std::endl;
         rc += 1;
     }
diff --git a/src/exif.cpp b/src/exif.cpp
index fe71de9c..1fe153f6 100644
--- a/src/exif.cpp
+++ b/src/exif.cpp
@@ -354,7 +354,7 @@ namespace Exiv2 {
 
     const char* Exifdatum::ifdName() const
     {
-        return key_.get() == 0 ? "" : key_->ifdName();
+        return key_.get() == 0 ? "" : Internal::ifdName(static_cast<Internal::IfdId>(key_->ifdId()));
     }
 
     int Exifdatum::idx() const
diff --git a/src/tags.cpp b/src/tags.cpp
index 93a74d9e..c3940717 100644
--- a/src/tags.cpp
+++ b/src/tags.cpp
@@ -2640,6 +2640,26 @@ namespace Exiv2 {
         return ii->tagList_();
     } // ExifTags::tagList
 
+    const char* ExifTags::sectionName(const ExifKey& key)
+    {
+        const TagInfo* ti = tagInfo(key.tag(), static_cast<Internal::IfdId>(key.ifdId()));
+        if (ti == 0) return sectionInfo[unknownTag.sectionId_].name_;
+        return sectionInfo[ti->sectionId_].name_;
+    }
+
+    uint16_t ExifTags::defaultCount(const ExifKey& key)
+    {
+        const TagInfo* ti = tagInfo(key.tag(), static_cast<Internal::IfdId>(key.ifdId()));
+        if (ti == 0) return unknownTag.count_;
+        return ti->count_;
+    }
+
+    const char* ExifTags::ifdName(const std::string& groupName)
+    {
+        IfdId ifdId = Internal::groupId(groupName);        
+        return Internal::ifdName(ifdId);
+    }
+
     bool ExifTags::isMakerGroup(const std::string& groupName)
     {
         IfdId ifdId = Internal::groupId(groupName);
@@ -2795,17 +2815,6 @@ namespace Exiv2 {
         p_->makeKey(tag, ifdId, ti);
     }
 
-    ExifKey::ExifKey(const TagInfo& tagInfo)
-        : p_(new Impl)
-    {
-        IfdId ifdId = static_cast<IfdId>(tagInfo.ifdId_);
-        if (!Internal::isExifIfd(ifdId) && !Internal::isMakerIfd(ifdId)) {
-            throw Error(23, ifdId);
-        }
-        p_->groupName_ = Exiv2::groupName(ifdId);
-        p_->makeKey(tagInfo.tag_, ifdId, &tagInfo);
-    }
-
     ExifKey::ExifKey(const std::string& key)
         : p_(new Impl)
     {
@@ -2850,11 +2859,6 @@ namespace Exiv2 {
         return p_->groupName_;
     }
 
-    const char* ExifKey::ifdName() const
-    {
-        return Internal::ifdName(p_->ifdId_);
-    }
-
     std::string ExifKey::tagName() const
     {
         return p_->tagName();
@@ -2878,12 +2882,6 @@ namespace Exiv2 {
         return p_->tagInfo_->typeId_;
     }
 
-    uint16_t ExifKey::defaultCount() const
-    {
-        if (p_->tagInfo_ == 0) return unknownTag.count_;
-        return p_->tagInfo_->count_;
-    }
-
     uint16_t ExifKey::tag() const
     {
         return p_->tag_;
@@ -2904,11 +2902,6 @@ namespace Exiv2 {
         return p_->ifdId_;
     }
 
-    std::string ExifKey::sectionName() const
-    {
-        return sectionInfo[p_->tagInfo_->sectionId_].name_;
-    }
-
     int ExifKey::idx() const
     {
         return p_->idx_;
@@ -2919,7 +2912,8 @@ namespace Exiv2 {
 
     std::ostream& operator<<(std::ostream& os, const TagInfo& ti)
     {
-        ExifKey exifKey(ti);
+        
+        ExifKey exifKey(ti.tag_, Internal::groupName(static_cast<Internal::IfdId>(ti.ifdId_)));
         return os << exifKey.tagName() << ",\t"
                   << std::dec << exifKey.tag() << ",\t"
                   << "0x" << std::setw(4) << std::setfill('0')
diff --git a/src/tags.hpp b/src/tags.hpp
index d7095024..3c2610ad 100644
--- a/src/tags.hpp
+++ b/src/tags.hpp
@@ -47,6 +47,7 @@ namespace Exiv2 {
 // *****************************************************************************
 // class declarations
     class ExifData;
+    class ExifKey;
     class Value;
     struct TagInfo;
 
@@ -123,6 +124,13 @@ namespace Exiv2 {
         //! Print the list of tags for \em groupName
         static void taglist(std::ostream& os, const std::string& groupName);
 
+        //! Return the name of the section for an Exif \em key.
+        static const char* sectionName(const ExifKey& key);
+        //! Return the default number of components (not bytes!) \em key has. (0=any, -1=count not known)
+        static uint16_t defaultCount(const ExifKey& key);
+        //! Return the name of the IFD for the group.
+        static const char* ifdName(const std::string& groupName);
+
         /*!
           @brief Return true if \em groupName is a makernote group.
         */
@@ -165,12 +173,6 @@ namespace Exiv2 {
                  and group name.
          */
         ExifKey(uint16_t tag, const std::string& groupName);
-        /*!
-          @brief Constructor to create an Exif key from a tag info structure
-          @param tagInfo The tag info structure
-          @throw Error if the key cannot be constructed from the tag info structure
-         */
-        explicit ExifKey(const TagInfo& tagInfo);
         //! Copy constructor
         ExifKey(const ExifKey& rhs);
         //! Destructor
@@ -192,23 +194,17 @@ namespace Exiv2 {
         virtual std::string key() const;
         virtual const char* familyName() const;
         virtual std::string groupName() const;
+        //! Return the IFD id as an integer. (Do not use, this is meant for library internal use.)
+        int ifdId() const;
         virtual std::string tagName() const;
+        virtual uint16_t tag() const;
         virtual std::string tagLabel() const;
         //! Return the tag description.
         std::string tagDesc() const;        // Todo: should be in the base class
         //! Return the default type id for this tag.
         TypeId defaultTypeId() const;       // Todo: should be in the base class
-        //! Return the default number of components (not bytes!) this tag has. (0=any, -1=count not known)
-        uint16_t defaultCount() const;
-        virtual uint16_t tag() const;
 
         AutoPtr clone() const;
-        //! Return the IFD id as an integer. (Do not use, this is meant for library internal use.)
-        int ifdId() const;
-        //! Return the name of the IFD
-        const char* ifdName() const;
-        //! Return the name of the Exif section (deprecated)
-        std::string sectionName() const;
         //! Return the index (unique id of this key within the original Exif data, 0 if not set)
         int idx() const;
         //@}