+/**
+ * \brief removes an already existing Dicom Dictionary Entry,
+ * identified by its Tag
+ * @param key (group|element)
+ * @return false if Dicom Dictionary Entry doesn't exist
+ */
+bool Dict::RemoveEntry(TagKey const &key)
+{
+ TagKeyHT::const_iterator it = KeyHt.find(key);
+ if ( it != KeyHt.end() )
+ {
+ it->second->Unregister();
+ KeyHt.erase(key);
+
+ return true;
+ }
+ else
+ {
+ gdcmWarningMacro( "Unfound entry" << key );
+ return false;
+ }
+}
+
+/**
+ * \brief removes an already existing Dicom Dictionary Entry,
+ * identified by its group,element number
+ * @param group Dicom group number of the Dicom Element
+ * @param elem Dicom element number of the Dicom Element
+ * @return false if Dicom Dictionary Entry doesn't exist
+ */
+bool Dict::RemoveEntry(uint16_t group, uint16_t elem)
+{
+ return RemoveEntry(DictEntry::TranslateToKey(group, elem));
+}
+
+/**
+ * \brief Remove all Dicom Dictionary Entries
+ */
+void Dict::ClearEntry()
+{
+ // we assume all the pointed DictEntries are already cleaned-up
+ // when we clean KeyHt.
+ TagKeyHT::const_iterator it;
+ for(it = KeyHt.begin();it!=KeyHt.end();++it)
+ it->second->Unregister();
+ KeyHt.clear();
+}
+
+/**
+ * \brief Get the dictionary entry identified by a given tag ("group|element")
+ * @param key tag of the searched entry
+ * @return the corresponding dictionary entry when existing, NULL otherwise
+ */
+DictEntry *Dict::GetEntry(TagKey const &key)
+{
+ TagKeyHT::iterator it = KeyHt.find(key);
+ if ( it == KeyHt.end() )
+ {
+ return 0;
+ }
+ return it->second;
+}
+/**
+ * \brief Get the dictionary entry identified by it's "group" and "element")
+ * @param group Group number of the searched entry.
+ * @param elem Element number of the searched entry.
+ * @return the corresponding dictionary entry when existing, NULL otherwise
+ */
+DictEntry *Dict::GetEntry(uint16_t group, uint16_t elem)
+{
+ TagKey key = DictEntry::TranslateToKey(group, elem);
+ TagKeyHT::iterator it = KeyHt.find(key);
+ if ( it == KeyHt.end() )
+ {
+ return 0;
+ }
+ return it->second;
+}
+
+/**
+ * \brief Get the first entry while visiting the Dict entries
+ * \return The first DicEntry if found, otherwhise NULL
+ */
+DictEntry *Dict::GetFirstEntry()
+{
+ ItKeyHt = KeyHt.begin();
+ if ( ItKeyHt != KeyHt.end() )
+ return ItKeyHt->second;
+ return NULL;
+}
+
+/**
+ * \brief Get the next entry while visiting the Hash table (KeyHt)
+ * \note : meaningfull only if GetFirstEntry already called
+ * \return The next DictEntry if found, otherwhise NULL
+ */
+DictEntry *Dict::GetNextEntry()
+{
+ gdcmAssertMacro (ItKeyHt != KeyHt.end());
+
+ ++ItKeyHt;
+ if (ItKeyHt != KeyHt.end())
+ return ItKeyHt->second;
+ return NULL;