diff --git a/feed.go b/feed.go
index 1511d71..29d3c74 100644
--- a/feed.go
+++ b/feed.go
@@ -68,17 +68,21 @@ type Item struct {
 	XMLName         xml.Name       `xml:"item"`
 	Title           string         `xml:"title"`
 	GUID            string         `xml:"guid"`
+	Link            string         `xml:"link"`
 	PubDate         *PubDate       `xml:"pubDate"`
 	Author          string         `xml:"itunes:author,omitempty"`
 	Block           string         `xml:"itunes:block,omitempty"`
-	Duration        time.Duration  `xml:"itunes:duration,omitempty"`
+	Duration        string  `xml:"itunes:duration,omitempty"`
 	Explicit        string         `xml:"itunes:explicit,omitempty"`
 	ClosedCaptioned string         `xml:"itunes:isClosedCaptioned,omitempty"`
 	Order           int            `xml:"itunes:order,omitempty"`
+    ItunesTitle     string         `xml:"itunes:title,omitempty"`
 	Subtitle        string         `xml:"itunes:subtitle,omitempty"`
 	Summary         *ItunesSummary `xml:"itunes:summary,omitempty"`
 	Enclosure       *Enclosure
 	Image           *ItunesImage
+    Season          int            `xml:"itunes:season,omitempty"`
+    Episode         int            `xml:"itunes:episode,omitempty"`
 }
 
 // Channel represents a RSS channel for given podcast.
diff --git a/options.go b/options.go
index bd3743b..66de23e 100644
--- a/options.go
+++ b/options.go
@@ -13,11 +13,13 @@ var (
 	ErrInvalidImage = errors.New("podcasts: invalid image")
 )
 
+// Values represents positive/negative value used in XML feed.
 const (
-	// ValueYes represents positive value used in XML feed.
 	ValueYes = "yes"
+	ValueNo = "no"
 )
 
+
 // Author sets itunes:author of given feed.
 func Author(author string) func(f *Feed) error {
 	return func(f *Feed) error {
@@ -37,13 +39,17 @@ func Explicit(f *Feed) error {
 	f.Channel.Explicit = ValueYes
 	return nil
 }
+// NotExplicit disables itunes:explicit of given feed.
+func NotExplicit(f *Feed) error {
+	f.Channel.Explicit = ValueNo
+	return nil
+}
 
 // Complete enables itunes:complete of given feed.
 func Complete(f *Feed) error {
 	f.Channel.Complete = ValueYes
 	return nil
 }
-
 // NewFeedURL sets itunes:new-feed-url of given feed.
 func NewFeedURL(newURL string) func(f *Feed) error {
 	return func(f *Feed) error {
@@ -102,3 +108,24 @@ func Image(href string) func(f *Feed) error {
 		return nil
 	}
 }
+
+
+
+// Category appends itunes:category of given feed.
+// Execute multiple times to add new main category and subcategories
+func Category(category string, subcategories []string) func(f *Feed) error {
+	return func(f *Feed) error {
+        c := &ItunesCategory{
+            Text: category,
+        }
+
+        for _, subcategory := range subcategories {
+            c.Categories = append(c.Categories, &ItunesCategory{
+                Text: subcategory,
+            })
+        }
+
+		f.Channel.Categories = append(f.Channel.Categories, c)
+		return nil
+	}
+}