--- a/OrthancServer/Sources/Database/StatelessDatabaseOperations.cpp	Mon Jun 27 14:09:17 2022 +0200
+++ b/OrthancServer/Sources/Database/StatelessDatabaseOperations.cpp	Mon Jun 27 15:22:19 2022 +0200
@@ -45,71 +45,6 @@
 
 namespace Orthanc
 {
-  // copy all tags from Json (used to read from metadata)
-  void DicomSequencesMap::Deserialize(const Json::Value& serialized)
-  {
-    Json::Value::Members members = serialized.getMemberNames();
-    for (size_t i = 0; i < members.size(); i++)
-    {
-      DicomTag tag = FromDcmtkBridge::ParseTag(members[i].c_str());
-      sequences_[tag] = serialized[members[i]];
-    }
-  }
-
-  // serialize a subet of tags (used to store in the metadata)
-  void DicomSequencesMap::Serialize(Json::Value& target, const std::set<DicomTag>& tags) const
-  {
-    // add the sequences to "target"
-    for (std::map<DicomTag, Json::Value>::const_iterator it = sequences_.begin();
-          it != sequences_.end(); ++it)
-    {
-      if (tags.find(it->first) != tags.end())
-      {
-        target[it->first.Format()] = it->second;
-      }
-    }
-  }
-
-  // copy a subset of tags from Json
-  void DicomSequencesMap::FromDicomAsJson(const Json::Value& dicomAsJson, const std::set<DicomTag>& tags)
-  {
-    for (std::set<DicomTag>::const_iterator it = tags.begin();
-         it != tags.end(); ++it)
-    {
-      std::string tag = it->Format();
-      if (dicomAsJson.isMember(tag))
-      {
-        sequences_[*it] = dicomAsJson[tag];
-      }
-    }
-  }
-
-  void DicomSequencesMap::ToJson(Json::Value& target, DicomToJsonFormat format) const
-  {
-    // add the sequences to "target"
-    for (std::map<DicomTag, Json::Value>::const_iterator it = sequences_.begin();
-          it != sequences_.end(); ++it)
-    {
-      Json::Value sequenceForConversion = Json::objectValue;
-      sequenceForConversion[it->first.Format()] = it->second;
-
-      Json::Value& requestedFormatJson = sequenceForConversion;
-      Json::Value convertedJson;
-
-      if (format != DicomToJsonFormat_Full)
-      {
-        Toolbox::SimplifyDicomAsJson(convertedJson, sequenceForConversion, format);
-        requestedFormatJson = convertedJson;
-      }
-      
-      Json::Value::Members keys = requestedFormatJson.getMemberNames();  
-      for (size_t i = 0; i < keys.size(); i++)  // there should always be only one member in this JSON
-      {
-        target[keys[i]] = requestedFormatJson[keys[i]];
-      }
-    }
-  }
-
   namespace
   {
     /**