diff --git a/classes/extravar/Extravar.class.php b/classes/extravar/Extravar.class.php
index b29f40b17..6178c9a4c 100644
--- a/classes/extravar/Extravar.class.php
+++ b/classes/extravar/Extravar.class.php
@@ -45,7 +45,7 @@
                     if(!is_array($GLOBALS['XE_EXTRAVARS'][$this->module_srl])) $GLOBALS['XE_EXTRAVARS'][$this->module_srl] = array();
                     foreach($extra_keys as $key => $val) {
                         $obj = null;
-                        $obj = new ExtraItem($val->module_srl, $val->idx, $val->name, $val->type, $val->default, $val->desc, $val->is_required, $val->search, $val->value); 
+                        $obj = new ExtraItem($val->module_srl, $val->idx, $val->name, $val->type, $val->default, $val->desc, $val->is_required, $val->search, $val->value,  $val->eid); 
                         $GLOBALS['XE_EXTRAVARS'][$this->module_srl][$val->idx] = $obj;
                     }
                 }
@@ -76,11 +76,12 @@
         var $is_required = 'N';
         var $search = 'N';
         var $value = null;
+        var $eid = '';
 
         /**
          * @brief constructor
          **/
-        function ExtraItem($module_srl, $idx, $name, $type = 'text', $default = null, $desc = '', $is_required = 'N', $search = 'N', $value = null) {
+        function ExtraItem($module_srl, $idx, $name, $type = 'text', $default = null, $desc = '', $is_required = 'N', $search = 'N', $value = null, $eid = '') {
             if(!$idx) return;
             $this->module_srl = $module_srl;
             $this->idx = $idx;
@@ -91,6 +92,7 @@
             $this->is_required = $is_required;
             $this->search = $search;
             $this->value = $value;
+            $this->eid = $eid;
         }
 
         /**
diff --git a/common/lang/ko.lang.php b/common/lang/ko.lang.php
index e810d8c56..2a2735ade 100644
--- a/common/lang/ko.lang.php
+++ b/common/lang/ko.lang.php
@@ -269,6 +269,7 @@
     $lang->default_value = '기본 값';
     $lang->is_active = '활성';
     $lang->is_required = '필수항목';
+    $lang->eid = '확장변수 이름';
 
     // ftp 관련
     $lang->ftp_form_title = 'FTP 정보 입력';
diff --git a/modules/document/document.admin.controller.php b/modules/document/document.admin.controller.php
index c1ada3a9a..4bf6f5356 100644
--- a/modules/document/document.admin.controller.php
+++ b/modules/document/document.admin.controller.php
@@ -337,8 +337,9 @@
             $default = Context::get('default');
             $desc = Context::get('desc');
             $search = Context::get('search');
+			$eid = Context::get('eid');
 
-            if(!$module_srl || !$name) return new Object(-1,'msg_invalid_request');
+            if(!$module_srl || !$name || !$eid) return new Object(-1,'msg_invalid_request');
 
             // idx가 지정되어 있지 않으면 최고 값을 지정
             if(!$var_idx) {
@@ -347,9 +348,18 @@
                 $var_idx = $output->data->var_idx+1;
             }
 
+			// 이미 존재하는 모듈 이름인지 체크
+			$obj->module_srl = $module_srl;
+			$obj->var_idx = $var_idx;
+			$obj->eid = $eid;
+            $output = executeQuery('document.isExistsExtraKey', $obj);
+            if(!$output->toBool() || $output->data->count) {
+                return new Object(-1, 'msg_extra_name_exists');
+            }
+
             // insert or update
             $oDocumentController = &getController('document');
-            $output = $oDocumentController->insertDocumentExtraKey($module_srl, $var_idx, $name, $type, $is_required, $search, $default, $desc);
+            $output = $oDocumentController->insertDocumentExtraKey($module_srl, $var_idx, $name, $type, $is_required, $search, $default, $desc, $eid);
             if(!$output->toBool()) return $output;
 
             $this->setMessage('success_registed');
@@ -574,7 +584,7 @@
             } else {
                 $args->module_srl = $module_srl;
                 $args->var_idx = $new_idx;
-                $args->new_idx = -1;
+                $args->new_idx = -10000;
                 $output = executeQuery('document.updateDocumentExtraKeyIdx', $args);
                 if(!$output->toBool()) return $output;
                 $output = executeQuery('document.updateDocumentExtraVarIdx', $args);
@@ -587,7 +597,7 @@
                 $output = executeQuery('document.updateDocumentExtraVarIdx', $args);
                 if(!$output->toBool()) return $output;
 
-                $args->var_idx = -1;
+                $args->var_idx = -10000;
                 $args->new_idx = $var_idx;
                 $output = executeQuery('document.updateDocumentExtraKeyIdx', $args);
                 if(!$output->toBool()) return $output;
diff --git a/modules/document/document.class.php b/modules/document/document.class.php
index b4d8441c9..7683414a5 100644
--- a/modules/document/document.class.php
+++ b/modules/document/document.class.php
@@ -99,6 +99,12 @@
             // 2009. 03. 11 확장변수 값 테이블의 인덱스 점검
             if(!$oDB->isIndexExists("document_extra_vars", "unique_extra_vars")) return true;
 
+            /**
+             * 2009. 03. 19 : 확장변수 값 테이블에 eid가 없을 경우 추가
+             **/
+            if(!$oDB->isColumnExists("document_extra_keys","eid")) return true;
+            if(!$oDB->isColumnExists("document_extra_vars","eid")) return true;
+
             return false;
         }
 
@@ -200,6 +206,37 @@
                 $oDB->dropIndex("document_extra_vars", "unique_module_vars", true);
             }
 
+            /**
+             * 2009. 03. 19 : 확장변수 값 테이블에 eid 없을 경우 추가
+             **/
+            if(!$oDB->isColumnExists("document_extra_keys","eid")) {
+				$oDB->addColumn("document_extra_keys","eid","varchar",40);
+
+				$output = executeQuery('document.getGroupsExtraKeys', $obj);
+				if($output->toBool() && $output->data && count($output->data)) {
+					foreach($output->data as $extra_keys) {
+						$args = $extra_keys;
+						$args->var_idx = $extra_keys->idx;
+						$args->eid = "extra_vars".$extra_keys->idx;
+						$output = executeQuery('document.updateDocumentExtraKey', $args);
+					}
+				}
+			}
+
+            if(!$oDB->isColumnExists("document_extra_vars","eid")) {
+				$oDB->addColumn("document_extra_vars","eid","varchar",40);
+				$obj->var_idx = '-1,-2';
+				$output = executeQuery('document.getGroupsExtraVars', $obj);
+				if($output->toBool() && $output->data && count($output->data)) {
+					foreach($output->data as $extra_vars) {
+						$args = $extra_vars;
+						$args->var_idx = $extra_vars->idx;
+						$args->eid = "extra_vars".$extra_vars->idx;
+						$output = executeQuery('document.updateDocumentExtraVar', $args);
+					}
+				}
+			}
+
             return new Object(0,'success_updated');
 
         }
diff --git a/modules/document/document.controller.php b/modules/document/document.controller.php
index 8f1258fe3..84e7185f0 100644
--- a/modules/document/document.controller.php
+++ b/modules/document/document.controller.php
@@ -209,7 +209,7 @@
                     if(isset($obj->{'extra_vars'.$idx})) $value = trim($obj->{'extra_vars'.$idx});
                     elseif(isset($obj->{$extra_item->name})) $value = trim($obj->{$extra_item->name});
                     if(!isset($value)) continue;
-                    $this->insertDocumentExtraVar($obj->module_srl, $obj->document_srl, $idx, $value);
+                    $this->insertDocumentExtraVar($obj->module_srl, $obj->document_srl, $idx, $value, $extra_item->eid);
                 }
             }
 
@@ -358,7 +358,7 @@
                     if(isset($obj->{'extra_vars'.$idx})) $value = trim($obj->{'extra_vars'.$idx});
                     elseif(isset($obj->{$extra_item->name})) $value = trim($obj->{$extra_item->name});
                     if(!isset($value)) continue;
-                    $this->insertDocumentExtraVar($obj->module_srl, $obj->document_srl, $idx, $value);
+                    $this->insertDocumentExtraVar($obj->module_srl, $obj->document_srl, $idx, $value, $extra_item->eid);
                 }
             }
 
@@ -566,8 +566,8 @@
         /**
          * @breif documents 테이블의 확장 변수 등록
          **/
-        function insertDocumentExtraKey($module_srl, $var_idx, $var_name, $var_type, $var_is_required = 'N', $var_search = 'N', $var_default = '', $var_desc = '') {
-            if(!$module_srl || !$var_idx || !$var_name || !$var_type) return new Object(-1,'msg_invalid_request');
+        function insertDocumentExtraKey($module_srl, $var_idx, $var_name, $var_type, $var_is_required = 'N', $var_search = 'N', $var_default = '', $var_desc = '', $eid) {
+            if(!$module_srl || !$var_idx || !$var_name || !$var_type || !$eid) return new Object(-1,'msg_invalid_request');
     
             $obj->module_srl = $module_srl;
             $obj->var_idx = $var_idx;
@@ -577,6 +577,27 @@
             $obj->var_search = $var_search=='Y'?'Y':'N';
             $obj->var_default = $var_default;
             $obj->var_desc = $var_desc;
+			$obj->eid = $eid;
+
+            $output = executeQuery('document.getDocumentExtraKeys', $obj);
+            if(!$output->data) return executeQuery('document.insertDocumentExtraKey', $obj);
+            $output = executeQuery('document.updateDocumentExtraKey', $obj);
+			
+			// extra_vars에서 확장 변수 eid를 일괄 업데이트
+			$output = executeQuery('document.updateDocumentExtraVar', $obj);
+
+            return $output;
+        }
+
+		/**
+         * @breif documents 테이블의 확장 변수 등록
+         **/
+        function updateDocumentExtraKey($module_srl, $var_idx, $eid) {
+            if(!$module_srl || !$var_idx || !$eid) return new Object(-1,'msg_invalid_request');
+    
+            $obj->module_srl = $module_srl;
+            $obj->var_idx = $var_idx;
+			$obj->eid = $eid;
 
             $output = executeQuery('document.getDocumentExtraKeys', $obj);
             if(!$output->data) return executeQuery('document.insertDocumentExtraKey', $obj);
@@ -600,7 +621,7 @@
         /**
          * @breif documents 테이블의 확장 변수 값 등록
          **/
-        function insertDocumentExtraVar($module_srl, $document_srl, $var_idx, $value, $lang_code = '') {
+        function insertDocumentExtraVar($module_srl, $document_srl, $var_idx, $value, $eid = null, $lang_code = '') {
             if(!$module_srl || !$document_srl || !$var_idx || !isset($value)) return new Object(-1,'msg_invalid_request');
             if(!$lang_code) $lang_code = Context::getLangType();
     
@@ -608,7 +629,8 @@
             $obj->document_srl = $document_srl;
             $obj->var_idx = $var_idx;
             $obj->value = $value;
-            $obj->lang_code = $lang_code ;
+            $obj->lang_code = $lang_code;
+			$obj->eid = $eid;
 
             executeQuery('document.insertDocumentExtraVar', $obj);
         }
@@ -616,11 +638,12 @@
         /**
          * @brief documents 확장변수 값 제거
          **/
-        function deleteDocumentExtraVars($module_srl, $document_srl = null, $var_idx = null, $lang_code = null) {
+        function deleteDocumentExtraVars($module_srl, $document_srl = null, $var_idx = null, $lang_code = null, $eid = null) {
             $obj->module_srl = $module_srl;
             if(!is_null($document_srl)) $obj->document_srl = $document_srl;
             if(!is_null($var_idx)) $obj->var_idx = $var_idx;
             if(!is_null($lang_code)) $obj->lang_code = $lang_code;
+            if(!is_null($eid)) $obj->lang_code = $eid;
             $output = executeQuery('document.deleteDocumentExtraVars', $obj);
             return $output;
         }
diff --git a/modules/document/document.model.php b/modules/document/document.model.php
index 147f032ba..8797adf01 100644
--- a/modules/document/document.model.php
+++ b/modules/document/document.model.php
@@ -53,13 +53,13 @@
                         else if($val->idx == -2) $GLOBALS['XE_DOCUMENT_LIST'][$val->document_srl]->add('content', $val->value);
                     } elseif($val->idx>0) {
                         if($lang_code == $val->lang_code) {
-                            $obj = new ExtraItem($val->module_srl, $val->idx, $val->name, $val->type, $val->default, $val->desc, $val->is_required, $val->search, $val->value);
+                            $obj = new ExtraItem($val->module_srl, $val->idx, $val->name, $val->type, $val->default, $val->desc, $val->is_required, $val->search, $val->value, $val->eid);
                             $GLOBALS['XE_EXTRA_VARS'][$val->document_srl][$val->idx] = $obj;
                         } else if($lang_code == $GLOBALS['XE_DOCUMENT_LIST'][$val->document_srl]->lang_code && !isset($GLOBALS['XE_EXTRA_VARS'][$val->document_srl][$val->idx])) {
-                            $obj = new ExtraItem($val->module_srl, $val->idx, $val->name, $val->type, $val->default, $val->desc, $val->is_required, $val->search, $val->value);
+                            $obj = new ExtraItem($val->module_srl, $val->idx, $val->name, $val->type, $val->default, $val->desc, $val->is_required, $val->search, $val->value, $val->eid);
                             $GLOBALS['XE_EXTRA_VARS'][$val->document_srl][$val->idx] = $obj;
                         } else if(!isset($GLOBALS['XE_EXTRA_VARS'][$val->document_srl][$val->idx])) {
-                            $obj = new ExtraItem($val->module_srl, $val->idx, $val->name, $val->type, $val->default, $val->desc, $val->is_required, $val->search, $val->value);
+                            $obj = new ExtraItem($val->module_srl, $val->idx, $val->name, $val->type, $val->default, $val->desc, $val->is_required, $val->search, $val->value, $val->eid);
                             $GLOBALS['XE_EXTRA_VARS'][$val->document_srl][$val->idx] = $obj;
                         }
                     }
diff --git a/modules/document/queries/getDocumentExtraKeys.xml b/modules/document/queries/getDocumentExtraKeys.xml
index cea78b74b..bd0ad59cb 100644
--- a/modules/document/queries/getDocumentExtraKeys.xml
+++ b/modules/document/queries/getDocumentExtraKeys.xml
@@ -11,6 +11,7 @@
         <column name="var_search" alias="search" />
         <column name="var_default" alias="default" />
         <column name="var_desc" alias="desc" />
+		<column name="eid" alias="eid" />
     </columns>
     <conditions>
         <condition operation="equal" column="module_srl" var="module_srl" filter="number" notnull="notnull" />
diff --git a/modules/document/queries/getDocumentExtraVars.xml b/modules/document/queries/getDocumentExtraVars.xml
index 58fd59136..180fa8928 100644
--- a/modules/document/queries/getDocumentExtraVars.xml
+++ b/modules/document/queries/getDocumentExtraVars.xml
@@ -20,6 +20,7 @@
         <column name="extra_keys.var_search" alias="search" />
         <column name="extra_keys.var_default" alias="default" />
         <column name="extra_keys.var_desc" alias="desc" />
+        <column name="extra_keys.eid" alias="eid" />
         <column name="extra_vars.document_srl" alias="document_srl" />
         <column name="extra_vars.lang_code" alias="lang_code" />
         <column name="extra_vars.value" alias="value" />
@@ -27,6 +28,7 @@
     <conditions>
         <condition operation="equal" column="extra_keys.module_srl" var="module_srl" pipe="and" notnull="notnull" />
         <condition operation="equal" column="extra_keys.var_idx" var="var_idx" pipe="and" />
+        <condition operation="equal" column="extra_keys.eid" var="eid" pipe="and" />
     </conditions>
     <navigation>
         <index var="sort_index" default="extra_keys.var_idx" order="asc" />
diff --git a/modules/document/queries/getDocumentsExtraVars.xml b/modules/document/queries/getDocumentsExtraVars.xml
index 5fd98a335..73e5db94c 100644
--- a/modules/document/queries/getDocumentsExtraVars.xml
+++ b/modules/document/queries/getDocumentsExtraVars.xml
@@ -20,6 +20,7 @@
         <column name="extra_vars.document_srl" alias="document_srl" />
         <column name="extra_vars.lang_code" alias="lang_code" />
         <column name="extra_vars.value" alias="value" />
+        <column name="extra_vars.eid" alias="eid" />
     </columns>
     <conditions>
         <condition operation="in" column="extra_vars.document_srl" var="document_srl" pipe="and"  />
diff --git a/modules/document/queries/getGroupsExtraKeys.xml b/modules/document/queries/getGroupsExtraKeys.xml
new file mode 100644
index 000000000..cd38d4a34
--- /dev/null
+++ b/modules/document/queries/getGroupsExtraKeys.xml
@@ -0,0 +1,23 @@
+<query id="getGroupsExtraKeys" action="select">
+    <tables>
+        <table name="document_extra_keys" />
+    </tables>
+    <columns>
+        <column name="module_srl" alias="module_srl" />
+        <column name="var_idx" alias="idx" />
+        <column name="eid" alias="eid" />
+    </columns>
+    <conditions>
+        <condition operation="equal" column="module_srl" var="module_srl" filter="number" notnull="notnull" />
+        <condition operation="equal" column="var_idx" var="var_idx" filter="number" pipe="and" />
+        <condition operation="equal" column="eid" var="eid" notnull="notnull" pipe="and" />
+    </conditions>
+	<groups>
+		<group column="module_srl" />
+		<group column="var_idx" />
+		<group column="eid" />
+	</groups>
+    <navigation>
+        <index var="sort_index" default="var_idx" order="asc" />
+    </navigation>
+</query>
diff --git a/modules/document/queries/getGroupsExtraVars.xml b/modules/document/queries/getGroupsExtraVars.xml
new file mode 100644
index 000000000..574ee18bb
--- /dev/null
+++ b/modules/document/queries/getGroupsExtraVars.xml
@@ -0,0 +1,23 @@
+<query id="getGroupsExtraVars" action="select">
+    <tables>
+        <table name="document_extra_vars" />
+    </tables>
+    <columns>
+        <column name="module_srl" alias="module_srl" />
+        <column name="var_idx" alias="idx" />
+        <column name="eid" alias="eid" />
+    </columns>
+    <conditions>
+        <condition operation="equal" column="module_srl" var="module_srl" filter="number" notnull="notnull" />
+        <condition operation="notin" column="var_idx" var="var_idx" filter="number" pipe="and" />
+        <condition operation="equal" column="eid" var="eid" pipe="and" />
+    </conditions>
+	<groups>
+		<group column="module_srl" />
+		<group column="var_idx" />
+		<group column="eid" />
+	</groups>
+    <navigation>
+        <index var="sort_index" default="var_idx" order="asc" />
+    </navigation>
+</query>
diff --git a/modules/document/queries/insertDocumentExtraKey.xml b/modules/document/queries/insertDocumentExtraKey.xml
index 0103e7f2f..8bf33a63f 100644
--- a/modules/document/queries/insertDocumentExtraKey.xml
+++ b/modules/document/queries/insertDocumentExtraKey.xml
@@ -11,5 +11,6 @@
         <column name="var_search" var="var_search" default="N" notnull="notnull" />
         <column name="var_default" var="var_default" notnull="notnull" />
         <column name="var_desc" var="var_desc" notnull="notnull" />
+        <column name="eid" var="eid" notnull="notnull" />
     </columns>
 </query>
diff --git a/modules/document/queries/insertDocumentExtraVar.xml b/modules/document/queries/insertDocumentExtraVar.xml
index 32528617b..cef45f439 100644
--- a/modules/document/queries/insertDocumentExtraVar.xml
+++ b/modules/document/queries/insertDocumentExtraVar.xml
@@ -8,5 +8,6 @@
         <column name="var_idx" var="var_idx" filter="number" notnull="notnull" />
         <column name="value" var="value" notnull="notnull" />
         <column name="lang_code" var="lang_code" />
+        <column name="eid" var="eid" notnull="notnull" />
     </columns>
 </query>
diff --git a/modules/document/queries/isExistsExtraKey.xml b/modules/document/queries/isExistsExtraKey.xml
new file mode 100644
index 000000000..8aeac3325
--- /dev/null
+++ b/modules/document/queries/isExistsExtraKey.xml
@@ -0,0 +1,13 @@
+<query id="isExistsExtraKey" action="select">
+    <tables>
+        <table name="document_extra_keys" />
+    </tables>
+    <columns>
+        <column name="count(*)" alias="count" />
+    </columns>
+    <conditions>
+        <condition operation="equal" column="module_srl" var="module_srl" filter="number" notnull="notnull" pipe="where" />
+        <condition operation="notequal" column="var_idx" var="var_idx" filter="number" pipe="and" />
+        <condition operation="equal" column="eid" var="eid" notnull="notnull" pipe="and" />
+    </conditions>
+</query>
diff --git a/modules/document/queries/updateDocumentExtraKey.xml b/modules/document/queries/updateDocumentExtraKey.xml
index af0fb57d2..07966b4fd 100644
--- a/modules/document/queries/updateDocumentExtraKey.xml
+++ b/modules/document/queries/updateDocumentExtraKey.xml
@@ -9,6 +9,7 @@
         <column name="var_search" var="var_search" default="N" notnull="notnull" />
         <column name="var_default" var="var_default" notnull="notnull" />
         <column name="var_desc" var="var_desc" notnull="notnull" />
+        <column name="eid" var="eid" notnull="notnull" />
     </columns>
     <conditions>
         <condition operation="equal" column="module_srl" var="module_srl" filter="number" notnull="notnull" />
diff --git a/modules/document/queries/updateDocumentExtraVar.xml b/modules/document/queries/updateDocumentExtraVar.xml
index 818b28147..52bdcb9bb 100644
--- a/modules/document/queries/updateDocumentExtraVar.xml
+++ b/modules/document/queries/updateDocumentExtraVar.xml
@@ -5,6 +5,7 @@
     <columns>
         <column name="value" var="value" notnull="notnull" />
         <column name="lang_code" var="lang_code" />
+        <column name="eid" var="eid" />
     </columns>
     <conditions>
         <condition operation="equal" column="module_srl" var="module_srl" filter="number" notnull="notnull" />
diff --git a/modules/document/schemas/document_extra_keys.xml b/modules/document/schemas/document_extra_keys.xml
index 96d1026c2..5334e1882 100644
--- a/modules/document/schemas/document_extra_keys.xml
+++ b/modules/document/schemas/document_extra_keys.xml
@@ -7,4 +7,5 @@
     <column name="var_search" type="char" size="1" default="N" notnull="notnull" />
     <column name="var_default" type="text" />
     <column name="var_desc" type="text" />
+    <column name="eid" type="varchar" size="40" />
 </table>
diff --git a/modules/document/schemas/document_extra_vars.xml b/modules/document/schemas/document_extra_vars.xml
index d7b2e0efd..36e3df05f 100644
--- a/modules/document/schemas/document_extra_vars.xml
+++ b/modules/document/schemas/document_extra_vars.xml
@@ -4,4 +4,5 @@
     <column name="var_idx" type="number" size="11" notnull="notnull" unique="unique_extra_vars" />
     <column name="lang_code" type="varchar" size="10" notnull="notnull" unique="unique_extra_vars" />
     <column name="value" type="bigtext" />
+    <column name="eid" type="varchar" size="40" />
 </table>
diff --git a/modules/document/tpl/extra_keys.html b/modules/document/tpl/extra_keys.html
index e92bf7508..74264265a 100644
--- a/modules/document/tpl/extra_keys.html
+++ b/modules/document/tpl/extra_keys.html
@@ -14,6 +14,12 @@
 
         <h4 class="xeAdmin">{$lang->extra_vars} {$selected_var_idx}</h4>
         <table cellspacing="0" class="crossTable ">
+        <tr>
+            <th><div>{$lang->eid}</div></th>
+            <td class="wide">
+                <input type="text" name="eid" value="{$selected_var->eid}" class="inputTypeText w200" id="eid" /><p>{$lang->about_extra_vars_eid_value}</p>
+            </td>
+        </tr>
         <tr>
             <th><div>{$lang->column_name}</div></th>
             <td class="wide">
@@ -68,6 +74,7 @@
     <thead>
     <tr>
         <th><div>{$lang->no}</div></th>
+        <th><div>{$lang->eid}</div></th>
         <th><div>{$lang->column_name}</div></th>
         <th><div>{$lang->column_type}</div></th>
         <th><div>{$lang->is_required}</div></th>
@@ -79,6 +86,7 @@
     <!--@foreach($extra_keys as $key => $val)-->
     <tr>
         <td rowspan="3">{$val->idx}</td>
+        <td rowspan="3">{$val->eid}</td>
         <td class="nowrap"><b>{$val->name}</b></td>
         <td class="nowrap">{$lang->column_type_list[$val->type]}</td>
         <td rowspan="3"><!--@if($val->is_required=='Y')--><b>{$lang->is_required}</b><!--@else-->N<!--@end--></td>
diff --git a/modules/document/tpl/filter/insert_extra_var.xml b/modules/document/tpl/filter/insert_extra_var.xml
index 0b8e3d96d..e011d7386 100644
--- a/modules/document/tpl/filter/insert_extra_var.xml
+++ b/modules/document/tpl/filter/insert_extra_var.xml
@@ -2,6 +2,7 @@
     <form>
         <node target="name" required="true" />
         <node target="module_srl" required="true" />
+        <node target="eid" required="true" filter="alpha_number" />
     </form>
     <parameter />
     <response callback_func="completeInsertExtraVar">
diff --git a/modules/module/lang/ko.lang.php b/modules/module/lang/ko.lang.php
index 690a3b702..00988d124 100644
--- a/modules/module/lang/ko.lang.php
+++ b/modules/module/lang/ko.lang.php
@@ -64,6 +64,7 @@
     $lang->msg_move_failed = '이동 실패하였습니다';
     $lang->msg_cannot_delete_for_child = '하부 분류가  있는 분류는 삭제하실 수 없습니다';
     $lang->msg_limit_mid ='모듈이름은 영문+[영문+숫자+_] 만 가능합니다.';
+    $lang->msg_extra_name_exists = '이미 존재하는 확장변수 이름입니다. 다른 이름을 입력해주세요.';
 
     $lang->about_browser_title = '브라우저의 제목에 나타나는 값입니다. RSS/Trackback에서도 사용됩니다.';
     $lang->about_mid = '모듈이름은 http://주소/?mid=모듈이름 처럼 직접 호출할 수 있는 값입니다. ( 영문+[영문+숫자+_] 만 가능)';
@@ -83,7 +84,9 @@
     $lang->about_grant_deatil = '가입한 사용자는 cafeXE등 분양형 가상 사이트에 가입을 한 로그인 사용자를 의미합니다';
     $lang->about_module = "XE는 기본 라이브러리를 제외한 나머지는 모두 모듈로 구성되어 있습니다.\n모듈관리 모듈은 설치된 모든 모듈을 보여주고 관리를 도와줍니다.";
     $lang->about_extra_vars_default_value = '다중/단일 선택등 기본값이 여러개가 필요한 경우 , (콤마)로 연결하시면 됩니다';
-    $lang->about_search_virtual_site = '가상 사이트(카페XE등)의 도메인을 입력하신 후 검색하세요.<br/>가상 사이트이외의 모듈은 내용을 비우고 검색하시면 됩니다.  (http:// 는 제외)';
+    $lang->about_search_virtual_site = '가상 사이트(카페XE등)의 도메인을 입력하신 후 검색하세요.<br/>가상 사이트이외의 모듈은 내용을 비우고 검색하시면 됩니다.  (http:// 는 제
+	외)';
+    $lang->about_extra_vars_eid_value = '확장변수에 이름을 적어주세요. ( 영문+[영문+숫자+_] 만 가능)';
     $lang->about_langcode = '언어별로 다르게 설정하고 싶으시면 언어코드 찾기를 이용해주세요';
     $lang->about_file_extension= "%s 파일만 가능합니다.";
 ?>