diff --git a/headers/modsecurity/assay.h b/headers/modsecurity/assay.h
index fbe22176..38e621cf 100644
--- a/headers/modsecurity/assay.h
+++ b/headers/modsecurity/assay.h
@@ -39,6 +39,8 @@ typedef struct Rules_t Rules;
 #endif
 
 #include "modsecurity/intervention.h"
+#include "modsecurity/transaction/variable.h"
+#include "modsecurity/transaction/variables.h"
 
 #define LOGFY_ADD(a, b) \
     yajl_gen_string(g, reinterpret_cast<const unsigned char*>(a), strlen(a)); \
@@ -73,95 +75,6 @@ namespace operators {
 class Operator;
 }
 
-namespace transaction {
-
-class Variable {
- public:
-     Variable(const std::string& key, const std::string& value) :
-        m_key(key),
-        m_value(value) { }
-     std::string m_key;
-     std::string m_value;
-};
-
-
-class Variables :
-    public std::unordered_multimap<std::string, std::string> {
- public:
-    Variables() {
-        this->reserve(1000);
-    }
-
-    void storeVariable(std::string key, std::string value) {
-        this->emplace(key, value);
-    }
-
-    bool storeOrUpdateVariable(const std::string &key,
-        const std::string &value) {
-        if (updateFirstVariable(key, value) == false) {
-            storeVariable(key, value);
-        }
-        return true;
-    }
-
-
-    bool updateFirstVariable(const std::string &key, const std::string &value) {
-        auto range = this->equal_range(key);
-
-        for (auto it = range.first; it != range.second; ++it) {
-            it->second = value;
-            return true;
-        }
-        return false;
-    }
-
-
-    void deleteVariable(const std::string& key) {
-        this->erase(key);
-    }
-
-    std::list<Variable *>
-        resolveVariable(const std::string& key,
-        std::list<Variable *> *l) {
-        auto range = this->equal_range(key);
-
-        for (auto it = range.first; it != range.second; ++it) {
-            l->push_back(new transaction::Variable(key, it->second));
-        }
-
-        if (key.find(":") == std::string::npos && l->size() == 0) {
-            size_t keySize = key.size() + 1;
-            for (auto& x : *this) {
-                if (x.first.size() <= keySize) {
-                    continue;
-                }
-                if (x.first.at(keySize - 1) != ':') {
-                    continue;
-                }
-                if (x.first.compare(0, keySize, key + ":") != 0) {
-                    continue;
-                }
-                //  auto range = this->equal_range(x.first);
-
-                //  for (auto it = range.first; it != range.second; ++it) {
-                l->push_back(new transaction::Variable(x.first, x.second));
-                //  }
-            }
-        }
-
-        return *l;
-    }
-
-    std::list<Variable *>
-        resolveVariable(const std::string& key) {
-        std::list<Variable *> l;
-
-        return resolveVariable(key, &l);
-    }
-};
-
-
-} // name space Transaction
 
 /** @ingroup ModSecurity_CPP_API */
 class Assay {
@@ -248,7 +161,7 @@ class Assay {
     bool update_variable_first(std::string var, const std::string &value);
     void delete_variable(std::string key);
 
-    transaction::Variables m_variables_strings;
+    transaction::Variables m_variables;
     std::unordered_map<std::string, transaction::Variables *> collections;
 #ifndef NO_LOGS
     void debug(int, std::string);
diff --git a/headers/modsecurity/transaction/variable.h b/headers/modsecurity/transaction/variable.h
new file mode 100644
index 00000000..7e55860f
--- /dev/null
+++ b/headers/modsecurity/transaction/variable.h
@@ -0,0 +1,47 @@
+/*
+ * ModSecurity, http://www.modsecurity.org/
+ * Copyright (c) 2015 Trustwave Holdings, Inc. (http://www.trustwave.com/)
+ *
+ * You may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * If any of the files related to licensing are missing or if you have any
+ * other questions related to licensing please contact Trustwave Holdings, Inc.
+ * directly using the email address security@modsecurity.org.
+ *
+ */
+
+
+#ifdef __cplusplus
+#include <string>
+#endif
+
+
+#ifndef HEADERS_MODSECURITY_TRANSACTION_VARIABLE_H_
+#define HEADERS_MODSECURITY_TRANSACTION_VARIABLE_H_
+
+
+#ifndef __cplusplus
+typedef struct Variable_t Variable;
+#endif
+
+#ifdef __cplusplus
+namespace ModSecurity {
+namespace transaction {
+
+class Variable {
+ public:
+     Variable(const std::string& key, const std::string& value) :
+        m_key(key),
+        m_value(value) { }
+     std::string m_key;
+     std::string m_value;
+};
+
+}  // namespace transaction
+}  // namespace ModSecurity
+#endif
+
+#endif  // HEADERS_MODSECURITY_TRANSACTION_VARIABLE_H_
diff --git a/headers/modsecurity/transaction/variables.h b/headers/modsecurity/transaction/variables.h
new file mode 100644
index 00000000..9e95594b
--- /dev/null
+++ b/headers/modsecurity/transaction/variables.h
@@ -0,0 +1,123 @@
+/*
+ * ModSecurity, http://www.modsecurity.org/
+ * Copyright (c) 2015 Trustwave Holdings, Inc. (http://www.trustwave.com/)
+ *
+ * You may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * If any of the files related to licensing are missing or if you have any
+ * other questions related to licensing please contact Trustwave Holdings, Inc.
+ * directly using the email address security@modsecurity.org.
+ *
+ */
+
+
+#ifdef __cplusplus
+#include <string>
+#include <iostream>
+#include <unordered_map>
+#include <list>
+#endif
+
+
+#include "modsecurity/transaction/variable.h"
+
+
+#ifndef HEADERS_MODSECURITY_TRANSACTION_VARIABLES_H_
+#define HEADERS_MODSECURITY_TRANSACTION_VARIABLES_H_
+
+#ifndef __cplusplus
+typedef struct Variable_t Variables;
+#endif
+
+#ifdef __cplusplus
+namespace ModSecurity {
+namespace transaction {
+
+class Variables :
+    public std::unordered_multimap<std::string, std::string> {
+ public:
+    Variables() {
+        this->reserve(1000);
+    }
+
+
+    void storeVariable(std::string key, std::string value) {
+        this->emplace(key, value);
+    }
+
+
+    bool storeOrUpdateVariable(const std::string &key,
+        const std::string &value) {
+        if (updateFirstVariable(key, value) == false) {
+            storeVariable(key, value);
+        }
+        return true;
+    }
+
+
+    bool updateFirstVariable(const std::string &key, const std::string &value) {
+        auto range = this->equal_range(key);
+
+        for (auto it = range.first; it != range.second; ++it) {
+            it->second = value;
+            return true;
+        }
+        return false;
+    }
+
+
+    void deleteVariable(const std::string& key) {
+        this->erase(key);
+    }
+
+
+    std::list<Variable *>
+        resolveVariable(const std::string& key,
+        std::list<Variable *> *l) {
+        auto range = this->equal_range(key);
+
+        for (auto it = range.first; it != range.second; ++it) {
+            l->push_back(new transaction::Variable(key, it->second));
+        }
+
+        if (key.find(":") == std::string::npos && l->size() == 0) {
+            size_t keySize = key.size() + 1;
+            for (auto& x : *this) {
+                if (x.first.size() <= keySize) {
+                    continue;
+                }
+                if (x.first.at(keySize - 1) != ':') {
+                    continue;
+                }
+                if (x.first.compare(0, keySize, key + ":") != 0) {
+                    continue;
+                }
+                //  auto range = this->equal_range(x.first);
+
+                //  for (auto it = range.first; it != range.second; ++it) {
+                l->push_back(new transaction::Variable(x.first, x.second));
+                //  }
+            }
+        }
+
+        return *l;
+    }
+
+
+    std::list<Variable *>
+        resolveVariable(const std::string& key) {
+        std::list<Variable *> l;
+
+        return resolveVariable(key, &l);
+    }
+};
+
+}  // namespace transaction
+}  // namespace ModSecurity
+#endif
+
+
+#endif  // HEADERS_MODSECURITY_TRANSACTION_VARIABLES_H_
diff --git a/src/assay.cc b/src/assay.cc
index c54b3789..360497b1 100644
--- a/src/assay.cc
+++ b/src/assay.cc
@@ -1243,7 +1243,7 @@ std::string Assay::toOldAuditLogFormat(int parts, const std::string &trailer) {
         audit_log << this->m_protocol << " " << this->m_uri << " " << "HTTP/";
         audit_log << this->m_httpVersion << std::endl;
 
-        for (auto h : this->m_variables_strings) {
+        for (auto h : m_variables) {
             std::string filter = "REQUEST_HEADERS:";
             std::string a = h.first;
             std::string b = h.second;
@@ -1270,7 +1270,7 @@ std::string Assay::toOldAuditLogFormat(int parts, const std::string &trailer) {
     }
     if (parts & AuditLog::FAuditLogPart) {
         audit_log << "--" << trailer << "-" << "F--" << std::endl;
-        for (auto h : this->m_variables_strings) {
+        for (auto h : m_variables) {
             std::string filter = "RESPONSE_HEADERS:";
             std::string a = h.first;
             std::string b = h.second;
@@ -1359,7 +1359,7 @@ std::string Assay::to_json(int parts) {
             strlen("headers"));
         yajl_gen_map_open(g);
 
-        for (auto h : this->m_variables_strings) {
+        for (auto h : m_variables) {
             std::string filter = "REQUEST_HEADERS:";
             std::string a = h.first;
             std::string b = h.second;
@@ -1394,7 +1394,7 @@ std::string Assay::to_json(int parts) {
             strlen("headers"));
         yajl_gen_map_open(g);
 
-        for (auto h : this->m_variables_strings) {
+        for (auto h : m_variables) {
             std::string filter = "RESPONSE_HEADERS:";
             std::string a = h.first;
             std::string b = h.second;
@@ -1460,11 +1460,11 @@ std::string Assay::to_json(int parts) {
 
 
 void Assay::store_variable(std::string key, std::string value) {
-    this->m_variables_strings.emplace(key, value);
+    m_variables.emplace(key, value);
 }
 
 bool Assay::update_variable_first(std::string var, const std::string &value) {
-    auto range = m_variables_strings.equal_range(var);
+    auto range = m_variables.equal_range(var);
 
     for (auto it = range.first; it != range.second; ++it) {
         it->second = value;
@@ -1475,14 +1475,14 @@ bool Assay::update_variable_first(std::string var, const std::string &value) {
 }
 
 void Assay::delete_variable(std::string key) {
-    this->m_variables_strings.erase(key);
+    m_variables.erase(key);
 }
 
 
 void Assay::resolve_variable(const std::string& var,
     std::list<transaction::Variable *> *l) {
 
-    m_variables_strings.resolveVariable(var, l);
+    m_variables.resolveVariable(var, l);
 
     /* It may be a collection */
     for (auto &a : collections) {
@@ -1507,7 +1507,7 @@ void Assay::serverLog(const std::string& msg) {
 
 
 std::string* Assay::resolve_variable_first(const std::string& var) {
-    auto range = m_variables_strings.equal_range(var);
+    auto range = m_variables.equal_range(var);
 
     for (auto it = range.first; it != range.second; ++it) {
         return &it->second;