diff --git a/ZAPD/Main.cpp b/ZAPD/Main.cpp
index 98d11f0e0..4a58909f7 100644
--- a/ZAPD/Main.cpp
+++ b/ZAPD/Main.cpp
@@ -319,6 +319,13 @@ bool Parse(const std::string& xmlFilePath, const std::string& basePath, const st
 			ZFile* file = new ZFile(fileMode, child, basePath, outPath, "", xmlFilePath, false);
 			Globals::Instance->files.push_back(file);
 		}
+		else
+		{
+			throw std::runtime_error(
+				StringHelper::Sprintf("Parse: Fatal error in '%s'.\n\t Found a resource outside of "
+			                          "a File element: '%s'\n",
+			                          xmlFilePath.c_str(), child->Name()));
+		}
 	}
 
 	for (ZFile* file : Globals::Instance->files)
diff --git a/ZAPD/ZArray.cpp b/ZAPD/ZArray.cpp
index f00d85d41..dabe5260f 100644
--- a/ZAPD/ZArray.cpp
+++ b/ZAPD/ZArray.cpp
@@ -7,6 +7,7 @@ REGISTER_ZFILENODE(Array, ZArray);
 
 ZArray::ZArray(ZFile* nParent) : ZResource(nParent)
 {
+	canHaveInner = true;
 }
 
 void ZArray::ParseXML(tinyxml2::XMLElement* reader)
diff --git a/ZAPD/ZFile.cpp b/ZAPD/ZFile.cpp
index ca7f6bd93..79a0a4dea 100644
--- a/ZAPD/ZFile.cpp
+++ b/ZAPD/ZFile.cpp
@@ -1,6 +1,7 @@
 #include "ZFile.h"
 #include <algorithm>
 #include <cassert>
+#include <unordered_set>
 #include "Directory.h"
 #include "File.h"
 #include "Globals.h"
@@ -125,18 +126,55 @@ void ZFile::ParseXML(ZFileMode mode, XMLElement* reader, std::string filename, b
 		rawData = File::ReadAllBytes(basePath + "/" + name);
 	}
 
+	std::unordered_set<std::string> nameSet;
+	std::unordered_set<std::string> outNameSet;
+	std::unordered_set<std::string> offsetSet;
+
 	auto nodeMap = *GetNodeMap();
 	int rawDataIndex = 0;
 
 	for (XMLElement* child = reader->FirstChildElement(); child != NULL;
 	     child = child->NextSiblingElement())
 	{
-		if (child->Attribute("Offset") != NULL)
-			rawDataIndex =
-				strtol(StringHelper::Split(child->Attribute("Offset"), "0x")[1].c_str(), NULL, 16);
+		const char* nameXml = child->Attribute("Name");
+		const char* outNameXml = child->Attribute("OutName");
+		const char* offsetXml = child->Attribute("Offset");
 
 		if (Globals::Instance->verbosity >= VERBOSITY_INFO)
-			printf("%s: 0x%06X\n", child->Attribute("Name"), rawDataIndex);
+			printf("%s: 0x%06X\n", nameXml, rawDataIndex);
+
+		if (offsetXml != NULL)
+		{
+			rawDataIndex = strtol(StringHelper::Split(offsetXml, "0x")[1].c_str(), NULL, 16);
+
+			if (offsetSet.find(offsetXml) != offsetSet.end())
+			{
+				throw std::runtime_error(StringHelper::Sprintf(
+					"ZFile::ParseXML: Error in '%s'.\n\t Repeated 'Offset' attribute: %s \n",
+					name.c_str(), offsetXml));
+			}
+			offsetSet.insert(offsetXml);
+		}
+		if (outNameXml != NULL)
+		{
+			if (outNameSet.find(outNameXml) != outNameSet.end())
+			{
+				throw std::runtime_error(StringHelper::Sprintf(
+					"ZFile::ParseXML: Error in '%s'.\n\t Repeated 'OutName' attribute: %s \n",
+					name.c_str(), outNameXml));
+			}
+			outNameSet.insert(outNameXml);
+		}
+		if (nameXml != NULL)
+		{
+			if (nameSet.find(nameXml) != nameSet.end())
+			{
+				throw std::runtime_error(StringHelper::Sprintf(
+					"ZFile::ParseXML: Error in '%s'.\n\t Repeated 'Name' attribute: %s \n",
+					name.c_str(), nameXml));
+			}
+			nameSet.insert(nameXml);
+		}
 
 		string nodeName = string(child->Name());
 
@@ -173,8 +211,18 @@ void ZFile::ParseXML(ZFileMode mode, XMLElement* reader, std::string filename, b
 			resources.push_back(nRes);
 			rawDataIndex += nRes->GetRawDataSize();
 		}
+		else if (string(child->Name()) == "File")
+		{
+			throw std::runtime_error(StringHelper::Sprintf(
+				"ZFile::ParseXML: Error in '%s'.\n\t Can't declare a File inside a File.\n",
+				name.c_str()));
+		}
 		else
 		{
+			throw std::runtime_error(
+				StringHelper::Sprintf("ZFile::ParseXML: Error in '%s'.\n\t Unknown element found "
+			                          "inside a File element: '%s'.\n",
+			                          name.c_str(), nodeName.c_str()));
 		}
 	}
 }
diff --git a/ZAPD/ZLimb.cpp b/ZAPD/ZLimb.cpp
index ee596e68c..49b01fa24 100644
--- a/ZAPD/ZLimb.cpp
+++ b/ZAPD/ZLimb.cpp
@@ -6,6 +6,8 @@
 
 using namespace std;
 
+REGISTER_ZFILENODE(Limb, ZLimb);
+
 Struct_800A57C0::Struct_800A57C0(const std::vector<uint8_t>& rawData, uint32_t fileOffset)
 {
 	unk_0 = BitConverter::ToUInt16BE(rawData, fileOffset + 0x00);
diff --git a/ZAPD/ZResource.cpp b/ZAPD/ZResource.cpp
index 9ffcc74f0..767fc0f4a 100644
--- a/ZAPD/ZResource.cpp
+++ b/ZAPD/ZResource.cpp
@@ -1,5 +1,8 @@
 #include "ZResource.h"
 
+#include <regex>
+#include "StringHelper.h"
+
 using namespace std;
 
 ZResource::ZResource(ZFile* nParent)
@@ -42,7 +45,19 @@ void ZResource::ParseXML(tinyxml2::XMLElement* reader)
 	if (reader != nullptr)
 	{
 		if (reader->Attribute("Name") != nullptr)
+		{
 			name = reader->Attribute("Name");
+			static std::regex r("[a-zA-Z_]+[a-zA-Z0-9_]*",
+			                    std::regex::icase | std::regex::optimize);
+
+			if (!std::regex_match(name, r))
+			{
+				throw std::domain_error(
+					StringHelper::Sprintf("ZResource::ParseXML: Fatal error in '%s'.\n\t Resource "
+				                          "with invalid 'Name' attribute.\n",
+				                          name.c_str()));
+			}
+		}
 		else
 			name = "";
 
@@ -55,6 +70,14 @@ void ZResource::ParseXML(tinyxml2::XMLElement* reader)
 			isCustomAsset = true;
 		else
 			isCustomAsset = false;
+
+		if (!canHaveInner && !reader->NoChildren())
+		{
+			throw std::runtime_error(
+				StringHelper::Sprintf("ZResource::ParseXML: Fatal error in '%s'.\n\t Resource '%s' "
+			                          "with inner element/child detected.\n",
+			                          name.c_str(), reader->Name()));
+		}
 	}
 }
 
diff --git a/ZAPD/ZResource.h b/ZAPD/ZResource.h
index 03fadd97f..e319080c7 100644
--- a/ZAPD/ZResource.h
+++ b/ZAPD/ZResource.h
@@ -97,6 +97,7 @@ class ZResource
 	std::vector<uint8_t> rawData;
 	int rawDataIndex;
 	std::string sourceOutput;
+	bool canHaveInner = false;  // Can this type have an inner node?
 	bool isCustomAsset;  // If set to true, create a reference for the asset in the file, but don't
 	                     // actually try to extract it from the file
 };
diff --git a/ZAPD/ZRoom/ZRoom.cpp b/ZAPD/ZRoom/ZRoom.cpp
index 7876d7407..b35244241 100644
--- a/ZAPD/ZRoom/ZRoom.cpp
+++ b/ZAPD/ZRoom/ZRoom.cpp
@@ -56,6 +56,7 @@ ZRoom::ZRoom(ZFile* nParent) : ZResource(nParent)
 	extDefines = "";
 	scene = nullptr;
 	roomCount = -1;
+	canHaveInner = true;
 }
 
 ZRoom::~ZRoom()
@@ -67,9 +68,8 @@ ZRoom::~ZRoom()
 void ZRoom::ExtractFromXML(tinyxml2::XMLElement* reader, const std::vector<uint8_t>& nRawData,
                            const int nRawDataIndex, const std::string& nRelPath)
 {
-	rawData = nRawData;
-	rawDataIndex = nRawDataIndex;
-	name = string(reader->Attribute("Name"));
+	ZResource::ExtractFromXML(reader, nRawData, nRawDataIndex, nRelPath);
+
 	// room->scene = nScene;
 	scene = Globals::Instance->lastScene;