diff --git a/include/AVISO.h b/include/AVISO.h
index ed166c8..ec2f85a 100644
--- a/include/AVISO.h
+++ b/include/AVISO.h
@@ -15,6 +15,8 @@ class AVISOData: public LayeredData
  Type type = TYPE_UNKNOWN;
 
  public:
+ static constexpr const char* name = "AVISO";
+
  AVISOData() = default;
 
  MString DataTitle() const
diff --git a/include/AVISOLOCAL.h b/include/AVISOLOCAL.h
index 31f3c5a..2978b17 100644
--- a/include/AVISOLOCAL.h
+++ b/include/AVISOLOCAL.h
@@ -25,6 +25,8 @@ class AVISOLOCALData: public NCFuncs
  };
 
  public:
+ static constexpr const char* name = "AVISOLOCAL";
+
  using Data = Simple2DData;
 
  AVISOLOCALData() = default;
diff --git a/include/BINFILE.h b/include/BINFILE.h
index 7dc0c0c..42f145e 100644
--- a/include/BINFILE.h
+++ b/include/BINFILE.h
@@ -16,6 +16,8 @@ class BINFILEData
  std::unique_ptr<michlib::IntData> data;
 
  public:
+ static constexpr const char* name = "BINFILE";
+
  using Data = Simple2DData;
 
  BINFILEData() = default;
diff --git a/include/HYCOM.h b/include/HYCOM.h
index ab6c6fe..87194af 100644
--- a/include/HYCOM.h
+++ b/include/HYCOM.h
@@ -14,6 +14,8 @@ class HYCOMData: public LayeredData
  Type type = TYPE_UNKNOWN;
 
  public:
+ static constexpr const char* name = "HYCOM";
+
  HYCOMData() = default;
 
  MString DataTitle() const
diff --git a/include/MODISBINLOCAL.h b/include/MODISBINLOCAL.h
index a84bdb2..04e5590 100644
--- a/include/MODISBINLOCAL.h
+++ b/include/MODISBINLOCAL.h
@@ -1,21 +1,21 @@
 #pragma once
+#include "DataAdapters/ncfilealt.h"
 #include "ParseArgs.h"
 #include "basedata.h"
 #include "mdatetime.h"
 #include "mregex.h"
-#include "DataAdapters/ncfilealt.h"
 #include <dirent.h>
 #include <set>
 #include <utility>
 
+using michlib::Ceil;
+using michlib::Floor;
 using michlib::GPL;
 using michlib::MDateTime;
+using michlib::pointer_cast;
 using michlib::RegExp;
 using michlib::uint2;
 using michlib::uint4;
-using michlib::Floor;
-using michlib::Ceil;
-using michlib::pointer_cast;
 
 class MODISBINLOCALData
 {
@@ -32,6 +32,8 @@ class MODISBINLOCALData
  };
 
  public:
+ static constexpr const char* name = "MODISBINLOCAL";
+
  using Data = UngriddedData;
 
  MString Info() const;
diff --git a/include/NEMO.h b/include/NEMO.h
index 5f94c51..fa30761 100644
--- a/include/NEMO.h
+++ b/include/NEMO.h
@@ -14,6 +14,8 @@ class NEMOData: public LayeredData
  Type type = TYPE_UNKNOWN;
 
  public:
+ static constexpr const char* name = "NEMO";
+
  NEMOData() = default;
 
  MString DataTitle() const
diff --git a/include/NEMOBIO.h b/include/NEMOBIO.h
index 37d1e72..53573aa 100644
--- a/include/NEMOBIO.h
+++ b/include/NEMOBIO.h
@@ -13,6 +13,8 @@ class NEMOBIOData: public LayeredData
  Type type = TYPE_UNKNOWN;
 
  public:
+ static constexpr const char* name = "NEMOBIO";
+
  NEMOBIOData() = default;
 
  MString DataTitle() const
diff --git a/include/actions.h b/include/actions.h
index 4829601..cb1fa58 100644
--- a/include/actions.h
+++ b/include/actions.h
@@ -3,7 +3,7 @@
 #include "mdatetime.h"
 #include "mregex.h"
 #include "uvdata.h"
-#include <variant>
+#include "varhelpers.h"
 
 using michlib::BFileW;
 using michlib::MDateTime;
@@ -18,7 +18,26 @@ enum class ActionID
  GENINTFILE
 };
 
-template<ActionID id> struct ActionCarrier
+template<ActionID id> struct ActionName;
+
+template<> struct ActionName<ActionID::INFO>
+{
+ static constexpr const char* name = "info";
+};
+template<> struct ActionName<ActionID::TSC>
+{
+ static constexpr const char* name = "tsc";
+};
+template<> struct ActionName<ActionID::UV>
+{
+ static constexpr const char* name = "uv";
+};
+template<> struct ActionName<ActionID::GENINTFILE>
+{
+ static constexpr const char* name = "genintfile";
+};
+
+template<ActionID id> struct ActionCarrier: public ActionName<id>
 {
  constexpr static ActionID action = id;
 };
@@ -57,16 +76,8 @@ class Action: public ActionVariants
  MString Init(const CLArgs& args)
  {
   MString act = args.contains("action") ? args.at("action") : "info";
-  if(act == "info")
-   *this = ActionVariants(ActionCarrier<ActionID::INFO>());
-  else if(act == "tsc")
-   *this = ActionVariants(ActionCarrier<ActionID::TSC>());
-  else if(act == "uv")
-   *this = ActionVariants(ActionCarrier<ActionID::UV>());
-  else if(act == "genintfile")
-   *this = ActionVariants(ActionCarrier<ActionID::GENINTFILE>());
-  else
-   return "Unknown action: " + act;
+  bool    res = internal::InitV(*this, act);
+  if(!res) return "Unknown action: " + act;
   return "";
  }
 };
diff --git a/include/data.h b/include/data.h
index 2e6d9f2..22acd4b 100644
--- a/include/data.h
+++ b/include/data.h
@@ -6,7 +6,7 @@
 #include "MODISBINLOCAL.h"
 #include "NEMO.h"
 #include "NEMOBIO.h"
-#include <variant>
+#include "varhelpers.h"
 
 using DataVariants = std::variant<NEMOData, NEMOBIOData, HYCOMData, AVISOData, AVISOLOCALData, BINFILEData, MODISBINLOCALData>;
 class Data: public DataVariants
diff --git a/include/varhelpers.h b/include/varhelpers.h
new file mode 100644
index 0000000..dfa46fb
--- /dev/null
+++ b/include/varhelpers.h
@@ -0,0 +1,20 @@
+#pragma once
+#include <variant>
+
+namespace internal
+{
+template<class T1, class... T, class... Vargs> bool InitV1(std::variant<Vargs...>& v, const michlib::MString& n)
+{
+ if(T1::name != n)
+ {
+  if constexpr(sizeof...(T) > 0)
+   return InitV1<T...>(v, n);
+  else
+   return false;
+ }
+ v = T1();
+ return true;
+}
+
+template<class... Vargs> bool InitV(std::variant<Vargs...>& v, const michlib::MString& n) { return InitV1<Vargs...>(v, n); }
+} // namespace internal
diff --git a/src/data.cpp b/src/data.cpp
index 5a8c799..11bde1f 100644
--- a/src/data.cpp
+++ b/src/data.cpp
@@ -5,56 +5,10 @@ MString Data::Init(const CLArgs& args)
 {
  MString src = args.contains("source") ? args.at("source") : "";
  if(!src.Exist()) return "No source specified";
- if(src == "NEMO")
- {
-  NEMOData data;
-  auto     res = data.Open(args);
-  if(res.Exist()) return "Can't open source " + src + ":\n" + res;
-  *this = Data(std::move(data));
- }
- else if(src == "NEMOBIO")
- {
-  NEMOBIOData data;
-  auto        res = data.Open(args);
-  if(res.Exist()) return "Can't open source " + src + ":\n" + res;
-  *this = Data(std::move(data));
- }
- else if(src == "AVISO")
- {
-  AVISOData data;
-  auto      res = data.Open(args);
-  if(res.Exist()) return "Can't open source " + src + ":\n" + res;
-  *this = Data(std::move(data));
- }
- else if(src == "AVISOLOCAL")
- {
-  AVISOLOCALData data;
-  auto           res = data.Open(args);
-  if(res.Exist()) return "Can't open source " + src + ":\n" + res;
-  *this = Data(std::move(data));
- }
- else if(src == "HYCOM")
- {
-  HYCOMData data;
-  auto      res = data.Open(args);
-  if(res.Exist()) return "Can't open source " + src + ":\n" + res;
-  *this = Data(std::move(data));
- }
- else if(src == "BINFILE")
- {
-  BINFILEData data;
-  auto        res = data.Open(args);
-  if(res.Exist()) return "Can't open source " + src + ":\n" + res;
-  *this = Data(std::move(data));
- }
- else if(src == "MODISBINLOCAL")
- {
-  MODISBINLOCALData data;
-  auto              res = data.Open(args);
-  if(res.Exist()) return "Can't open source " + src + ":\n" + res;
-  *this = Data(std::move(data));
- }
- else
-  return "Unknown source: " + src;
+
+ bool res = internal::InitV(*this, src);
+ if(!res) return "Unknown source: " + src;
+ auto resop = std::visit([&args = std::as_const(args)](auto& data) -> auto { return data.Open(args); }, *this);
+ if(resop.Exist()) return "Can't open source " + src + ":\n" + resop;
  return "";
 }