diff --git a/MissionEditor/INIMeta.cpp b/MissionEditor/INIMeta.cpp
new file mode 100644
index 0000000..cdfdf0e
--- /dev/null
+++ b/MissionEditor/INIMeta.cpp
@@ -0,0 +1,39 @@
+#include "StdAfx.h"
+#include "INIMeta.h"
+#include <set>
+
+void IniFileGroup::Append(const CIniFile& INI)
+{
+	m_group.push_back(&INI);
+}
+
+
+const CIniFile* IniFileGroup::Nth(int idx) const
+{
+	return m_group.at(idx);
+}
+
+const CString& IniFileGroup::GetString(const CString & section, const CString & key) const
+{
+	for (auto it = m_group.rbegin(); it != m_group.rend(); ++it) {
+		auto const& got = (*it)->GetString(section, key);
+		if (!got.IsEmpty()) {
+			return got;
+		}
+	}
+	return CIniFileSection::EmptyValue;
+}
+
+CString IniFileGroup::GetStringOr(const CString & section, const CString & key, const CString& def) const
+{
+	auto const& got = this->GetString(section, key);
+	if (!got.IsEmpty()) {
+		return got;
+	}
+	return def;
+}
+
+IniSectionGroup IniFileGroup::GetSection(const CString& section) const
+{
+	return IniSectionGroup(*this, section);
+}
\ No newline at end of file
diff --git a/MissionEditor/INIMeta.h b/MissionEditor/INIMeta.h
new file mode 100644
index 0000000..deffb31
--- /dev/null
+++ b/MissionEditor/INIMeta.h
@@ -0,0 +1,142 @@
+#pragma once
+
+#include <afx.h>
+#include "IniFile.h"
+#include <vector>
+#include <map>
+
+using IndiceStorage = std::vector<CString>;
+using SequencedSection = std::vector<CString>;
+class IniSectionGroup;
+
+/*
+* @brief This class uses to simulation a combination of a few ini dictionaries, to
+		 act as they are inside a same ini
+*/
+class IniFileGroup
+{
+	friend class IniMegaFile;
+public:
+
+	using StorageType = std::vector<const CIniFile*>;
+
+	IniFileGroup() = default;
+
+
+	const CString& GetString(const CString& section, const CString& key) const;
+	CString GetStringOr(const CString& section, const CString& key, const CString& def) const;
+	IniSectionGroup GetSection(const CString& section) const;
+
+	auto Size() const { return m_group.size(); }
+
+	void Append(const CIniFile& INI);
+	const CIniFile* Nth(int idx) const;
+
+	auto begin() const { return m_group.begin(); }
+	auto end() const { return m_group.end(); }
+	bool empty() const { return m_group.empty(); }
+
+private:
+	StorageType m_group;
+};
+
+class IniSectionGroup
+{
+	using KvIter = CIniFileSection::Container::const_iterator;
+	using GroupIter = IniFileGroup::StorageType::const_iterator;
+public:
+	class Iterator;
+	friend class Iterator;
+	class Iterator {
+	public:
+		Iterator(const CString& section,
+			GroupIter groupIter,
+			GroupIter groupIterEnd,
+			KvIter kvIter,
+			KvIter kvIterEnd
+		) :
+			m_section(section),
+			m_groupIter(groupIter),
+			m_groupIterEnd(groupIterEnd),
+			m_kvIter(kvIter),
+			m_kvIterEnd(kvIterEnd)
+		{
+		}
+		Iterator& operator++() {
+			// section content still working
+			if (m_kvIter != std::prev(m_kvIterEnd)) {
+				m_kvIter++;
+				return *this;
+			}
+			m_groupIter++;
+			if (m_groupIter != m_groupIterEnd) {
+				auto [beg, end] = IniSectionGroup::acquireNextKvGroup(m_section, m_groupIter, m_groupIterEnd);
+				m_kvIter = beg;
+				m_kvIterEnd = end;
+			} else {
+				m_kvIter = m_kvIterEnd;// to make (==) works
+			}
+			return *this;
+		}
+
+		auto const& operator*() const {
+			return *m_kvIter;
+		}
+		bool operator==(const Iterator& rhs) const {
+			return m_groupIter == rhs.m_groupIter;
+		}
+
+	private:
+		GroupIter m_groupIter;
+		GroupIter m_groupIterEnd;
+		KvIter m_kvIter;
+		KvIter m_kvIterEnd;
+		const CString& m_section;
+	};
+
+	IniSectionGroup(const IniFileGroup& source, const CString& secName) :
+		m_source(source),
+		m_section(secName)
+	{
+	}
+
+	Iterator begin() const {
+		auto groupBeg = m_source.begin();
+		auto [secItBeg, secItEnd] = acquireNextKvGroup(groupBeg);
+		return Iterator(m_section, groupBeg, m_source.end(), secItBeg, secItEnd);
+	}
+
+	Iterator end() const {
+		auto secItEnd = KvIter{};
+		if (!m_source.empty()) {
+			auto const& sec = (*std::prev(m_source.end()))->GetSection(m_section);
+			secItEnd = sec.end();
+		}
+		return Iterator(m_section, m_source.end(), m_source.end(), secItEnd, secItEnd);
+	}
+
+private:
+	// attention: beginning iter 
+	static std::pair< KvIter, KvIter> acquireNextKvGroup(const CString& section, GroupIter& beg, const GroupIter end) {
+
+		auto secItBeg = KvIter{};
+		auto secItEnd = KvIter{};
+		for (; beg != end; ++beg) {
+			auto const& sec = (*beg)->GetSection(section);
+			if (sec.Size() == 0) {
+				continue;
+			}
+			secItBeg = sec.begin();
+			secItEnd = sec.end();
+			break;
+		}
+		return { secItBeg, secItEnd };
+	}
+
+	std::pair< KvIter, KvIter> acquireNextKvGroup(GroupIter& beg) const {
+		return acquireNextKvGroup(m_section, beg, m_source.end());
+	}
+
+	const IniFileGroup& m_source;
+	CString m_section;
+};
diff --git a/MissionEditor/IniFile.h b/MissionEditor/IniFile.h
index 4ad31ba..e00c108 100644
--- a/MissionEditor/IniFile.h
+++ b/MissionEditor/IniFile.h
@@ -43,8 +43,9 @@ using std::map;
 
 class CIniFileSection
 {
-	static const CString EmptyValue;
 public:
+	using Container = vector<std::pair<CString, CString>>;
+	static const CString EmptyValue;
 
 	CIniFileSection();
 	virtual ~CIniFileSection();
@@ -198,7 +199,7 @@ public:
 
 private:
 	map<CString, int64_t> value_pos{};
-	vector<std::pair<CString, CString>> value_pairs{};// sequenced
+	Container value_pairs{};// sequenced
 };
 
 class CIniFile
diff --git a/MissionEditor/MissionEditor.vcxproj b/MissionEditor/MissionEditor.vcxproj
index 2f8674e..81bdb17 100644
--- a/MissionEditor/MissionEditor.vcxproj
+++ b/MissionEditor/MissionEditor.vcxproj
@@ -498,6 +498,7 @@
     <ClCompile Include="Infantry.cpp" />
     <ClCompile Include="Info.cpp" />
     <ClCompile Include="IniFile.cpp" />
+    <ClCompile Include="INIMeta.cpp" />
     <ClCompile Include="InputBox.cpp" />
     <ClCompile Include="IsoView.cpp" />
     <ClCompile Include="Lighting.cpp" />
@@ -609,6 +610,7 @@
     <ClInclude Include="ComboUInputDlg.h" />
     <ClInclude Include="defines.h" />
     <ClInclude Include="IniHelper.h" />
+    <ClInclude Include="INIMeta.h" />
     <ClInclude Include="LineDrawer.h" />
     <ClInclude Include="DynamicGraphDlg.h" />
     <ClInclude Include="FinalSun.h" />
@@ -660,6 +662,7 @@
     <ClInclude Include="SingleplayerSettings.h" />
     <ClInclude Include="SpecialFlags.h" />
     <ClInclude Include="StdAfx.h" />
+    <ClInclude Include="StringHelper.h" />
     <ClInclude Include="structs.h" />
     <ClInclude Include="Tags.h" />
     <ClInclude Include="TaskForce.h" />
diff --git a/MissionEditor/MissionEditor.vcxproj.filters b/MissionEditor/MissionEditor.vcxproj.filters
index d54b83f..23f6af9 100644
--- a/MissionEditor/MissionEditor.vcxproj.filters
+++ b/MissionEditor/MissionEditor.vcxproj.filters
@@ -282,6 +282,9 @@
     <ClCompile Include="TextDrawer.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="INIMeta.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ResourceCompile Include="MissionEditor.rc">
@@ -568,6 +571,12 @@
     <ClInclude Include="IniHelper.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="StringHelper.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="INIMeta.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <Image Include="res\clifftoo.bmp">
diff --git a/MissionEditor/StringHelper.h b/MissionEditor/StringHelper.h
new file mode 100644
index 0000000..82f9d88
--- /dev/null
+++ b/MissionEditor/StringHelper.h
@@ -0,0 +1,25 @@
+#pragma once
+
+#include <afx.h>
+#include <vector>
+
+namespace utilities {
+	static std::vector<CString> split_string(const CString& pSource, TCHAR cSplit = ',')
+	{
+		std::vector<CString> ret;
+		CString tmp = pSource;
+		int pos = 0;
+
+		while ((pos = tmp.Find(cSplit)) != -1) {
+			ret.push_back(tmp.Left(pos));
+			tmp = tmp.Mid(pos + 1);
+		}
+
+		if (!tmp.IsEmpty()) {
+			ret.push_back(tmp);
+		}
+
+		return ret;
+	}
+}
+
diff --git a/UnitTest/CIni_Meta_Test.cpp b/UnitTest/CIni_Meta_Test.cpp
new file mode 100644
index 0000000..41a6142
--- /dev/null
+++ b/UnitTest/CIni_Meta_Test.cpp
@@ -0,0 +1,70 @@
+#include "stdafx.h"
+#include "../MissionEditor/INIMeta.h"
+
+#if 1
+TEST(IniFileGroup, ValidIniWithValidContentTest) {
+	CIniFile iniFile1;
+	CIniFile iniFile2;
+
+	const CString referenceList[] = {
+		CString("GANCST"),
+		CString("GAPOWR"),
+		CString("NACNST"),
+		CString("NAPOWR"),
+	};
+
+	iniFile1.SetString("BuildingTypes", "0", "GANCST");
+	iniFile1.SetString("BuildingTypes", "1", "GAPOWR");
+	iniFile1.SetString("GACNST", "Strength", "1000");
+	iniFile1.SetString("E2", "Strength", "100");
+
+	iniFile2.SetString("BuildingTypes", "2", "NACNST");
+	iniFile2.SetString("BuildingTypes", "3", "NAPOWR");
+	iniFile2.SetString("GACNST", "Strength", "2000");
+	iniFile2.SetString("NEWIFV", "Cost", "1000");
+
+	IniFileGroup group;
+	group.Append(iniFile1);
+	group.Append(iniFile2);
+
+	auto const bldTypes = group.GetSection("BuildingTypes");
+	auto idx = 0;
+	//for (auto const& [key, val] : bldTypes) {
+	for (auto it = bldTypes.begin(); it != bldTypes.end(); ++it) {
+		auto const& [key, val] = *it;
+		EXPECT_EQ(val, referenceList[idx++]);
+	}
+
+	EXPECT_EQ(group.GetString("GACNST", "Strength"), "2000");
+}
+#endif
+
+TEST(IniFileGroup, EmptyIniContentTest) {
+	CIniFile iniFile1;
+	CIniFile iniFile2;
+	IniFileGroup group;
+
+	group.Append(iniFile1);
+	group.Append(iniFile2);
+
+	auto const bldTypes = group.GetSection("BuildingTypes");
+	auto contentCount = 0;
+	for (auto it = bldTypes.begin(); it != bldTypes.end(); ++it) {
+		auto const& [key, val] = *it;
+		cout << key << "=" << val << endl;
+		contentCount++;
+	}
+
+	EXPECT_EQ(contentCount, 0);
+
+	iniFile1.SetString("BuildingTypes", "0", "GANCST");
+
+	contentCount = 0;
+	for (auto it = bldTypes.begin(); it != bldTypes.end(); ++it) {
+		auto const& [key, val] = *it;
+		cout << key << "=" << val << endl;
+		contentCount++;
+	}
+
+	EXPECT_EQ(contentCount, 1);
+}
\ No newline at end of file
diff --git a/UnitTest/StdAfx.h b/UnitTest/StdAfx.h
index 457cae7..fe450d1 100644
--- a/UnitTest/StdAfx.h
+++ b/UnitTest/StdAfx.h
@@ -27,6 +27,9 @@
 #include <iostream>
 #include <afxwin.h> 
 
+using std::cout;
+using std::endl;
+
 #if !defined(ASSERT)
 #define ASSERT(x) if (!(x)) throw("assertion failed");
 #endif
\ No newline at end of file
diff --git a/UnitTest/UnitTest.vcxproj b/UnitTest/UnitTest.vcxproj
index 76b6c5c..077815a 100644
--- a/UnitTest/UnitTest.vcxproj
+++ b/UnitTest/UnitTest.vcxproj
@@ -102,9 +102,9 @@
     <ClCompile>
       <WarningLevel>Level3</WarningLevel>
       <SDLCheck>true</SDLCheck>
-      <PreprocessorDefinitions>_DEBUG;_CONSOLE;_AFXDLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>_DEBUG;NOMINMAX;_CONSOLE;_AFXDLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
-      <AdditionalIncludeDirectories>$(SolutionDir)googletest\x64\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>$(SolutionDir)googletest\x64\include;$(SolutionDir)MissionEditorPackLib;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <PrecompiledHeader>Create</PrecompiledHeader>
       <RuntimeLibrary>MultiThreadedDebugDLL</RuntimeLibrary>
       <LanguageStandard>stdcpp20</LanguageStandard>
@@ -133,11 +133,14 @@
   </ItemDefinitionGroup>
   <ItemGroup>
     <ClCompile Include="..\MissionEditor\IniFile.cpp" />
+    <ClCompile Include="..\MissionEditor\INIMeta.cpp" />
+    <ClCompile Include="CIni_Meta_Test.cpp" />
     <ClCompile Include="CIni_Test.cpp" />
     <ClCompile Include="UnitTest.cpp" />
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\MissionEditor\IniFile.h" />
+    <ClInclude Include="..\MissionEditor\INIMeta.h" />
     <ClInclude Include="StdAfx.h" />
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
diff --git a/UnitTest/UnitTest.vcxproj.filters b/UnitTest/UnitTest.vcxproj.filters
index 37e3ea3..9de5faa 100644
--- a/UnitTest/UnitTest.vcxproj.filters
+++ b/UnitTest/UnitTest.vcxproj.filters
@@ -24,6 +24,12 @@
     <ClCompile Include="..\MissionEditor\IniFile.cpp">
       <Filter>源文件</Filter>
     </ClCompile>
+    <ClCompile Include="CIni_Meta_Test.cpp">
+      <Filter>源文件</Filter>
+    </ClCompile>
+    <ClCompile Include="..\MissionEditor\INIMeta.cpp">
+      <Filter>源文件</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="StdAfx.h">
@@ -32,5 +38,8 @@
     <ClInclude Include="..\MissionEditor\IniFile.h">
       <Filter>头文件</Filter>
     </ClInclude>
+    <ClInclude Include="..\MissionEditor\INIMeta.h">
+      <Filter>头文件</Filter>
+    </ClInclude>
   </ItemGroup>
 </Project>
\ No newline at end of file