diff --git a/feed_test.go b/feed_test.go
index dc84b76..a1345e8 100644
--- a/feed_test.go
+++ b/feed_test.go
@@ -76,26 +76,26 @@ func Test_RssAuthor(t *testing.T) {
 	}
 }
 
-func Test_Extensions(t *testing.T) {
+func Test_ItemExtensions(t *testing.T) {
 	content, _ := ioutil.ReadFile("testdata/extension.rss")
 	feed := New(1, true, chanHandler, itemHandler)
 	feed.FetchBytes("http://example.com", content, nil)
 
-	extension := feed.Channels[0].Items[0].Extensions["http://www.sec.gov/Archives/edgar"][0]
+	edgarExtension := feed.Channels[0].Items[0].Extensions["http://www.sec.gov/Archives/edgar"]
 
 	companyExpected := "Cellular Biomedicine Group, Inc."
-	companyName := *extension.Childrens[0]
+	companyName := edgarExtension["companyName"][0]
 	if companyName.Value != companyExpected {
 		t.Errorf("Expected company to be %s but found %s", companyExpected, companyName.Value)
 	}
 
-	files := *extension.Childrens[11]
+	files := edgarExtension["xbrlFiles"][0].Childrens["xbrlFile"]
 	fileSizeExpected := 10
-	if len(files.Childrens) != 10 {
-		t.Errorf("Expected files size to be %s but found %s", fileSizeExpected, len(files.Childrens))
+	if len(files) != 10 {
+		t.Errorf("Expected files size to be %s but found %s", fileSizeExpected, len(files))
 	}
 
-	file := *files.Childrens[0]
+	file := files[0]
 	fileExpected := "cbmg_10qa.htm"
 	if file.Attrs["file"] != fileExpected {
 		t.Errorf("Expected file to be %s but found %s", fileExpected, len(file.Attrs["file"]))
diff --git a/item.go b/item.go
index a9b274f..74045e4 100644
--- a/item.go
+++ b/item.go
@@ -24,7 +24,7 @@ type Item struct {
 	Contributors []string
 	Content      *Content
 
-	Extensions map[string][]*Extension
+	Extensions map[string]map[string][]Extension
 }
 
 func (i *Item) Key() string {
diff --git a/rss.go b/rss.go
index 34e1eee..a4797de 100644
--- a/rss.go
+++ b/rss.go
@@ -10,7 +10,7 @@ type Extension struct {
 	Name      string
 	Value     string
 	Attrs     map[string]string
-	Childrens []*Extension
+	Childrens map[string][]Extension
 }
 
 var days = map[string]int{
@@ -182,11 +182,11 @@ func (this *Feed) readRss2(doc *xmlx.Document) (err error) {
 			}
 
 			tl = item.SelectNodes("*", "*")
-			i.Extensions = make(map[string][]*Extension)
+			i.Extensions = make(map[string]map[string][]Extension)
 			for _, lv := range tl {
-				e, ok := getExtension(lv)
+				e, ok := getExtentions(lv)
 				if ok {
-					i.Extensions[lv.Name.Space] = append(i.Extensions[lv.Name.Space], e)
+					i.Extensions[lv.Name.Space] = e
 				}
 			}
 
@@ -197,24 +197,39 @@ func (this *Feed) readRss2(doc *xmlx.Document) (err error) {
 	return
 }
 
-func getExtension(node *xmlx.Node) (*Extension, bool) {
+func getExtentions(node *xmlx.Node) (extentions map[string][]Extension, ok bool) {
+	extentions = make(map[string][]Extension, 0)
+	if node.Name.Space != "" {
+		for _, y := range node.Children {
+			extension, ok := getExtention(y)
+			if ok {
+				extentions[y.Name.Local] = append(extentions[y.Name.Local], extension)
+			}
+		}
+		ok = true
+	} else {
+		ok = false
+	}
+	return
+}
+
+func getExtention(node *xmlx.Node) (Extension, bool) {
+	var extension Extension
 	if node.Name.Space != "" {
-		var extension Extension
 		extension = Extension{Name: node.Name.Local, Value: node.GetValue()}
 		extension.Attrs = make(map[string]string)
-
+		extension.Childrens = make(map[string][]Extension, 0)
 		for _, x := range node.Attributes {
 			extension.Attrs[x.Name.Local] = x.Value
 		}
-
 		for _, y := range node.Children {
-			if c, ok := getExtension(y); ok {
-				extension.Childrens = append(extension.Childrens, c)
+			children, ok := getExtention(y)
+			if ok {
+				extension.Childrens[y.Name.Local] = append(extension.Childrens[y.Name.Local], children)
 			}
 		}
-
-		return &extension, true
+		return extension, true
 	} else {
-		return nil, false
+		return extension, false
 	}
 }