diff --git a/cmd/xmpp_component/xmpp_component.go b/cmd/xmpp_component/xmpp_component.go
index a4640ed..4b76a82 100644
--- a/cmd/xmpp_component/xmpp_component.go
+++ b/cmd/xmpp_component/xmpp_component.go
@@ -80,8 +80,8 @@ func DiscoResult(c MyComponent, attrs xmpp.PacketAttrs, info *xmpp.DiscoInfo) {
 	payload := xmpp.DiscoInfo{
 		Identity: identity,
 		Features: []xmpp.Feature{
-			{Var: "http://jabber.org/protocol/disco#info"},
-			{Var: "http://jabber.org/protocol/disco#item"},
+			{Var: xmpp.NSDiscoInfo},
+			{Var: xmpp.NSDiscoItems},
 		},
 	}
 	iq.AddPayload(&payload)
diff --git a/iq.go b/iq.go
index bfc13e3..eb2e9e8 100644
--- a/iq.go
+++ b/iq.go
@@ -318,8 +318,8 @@ type DiscoItem struct {
 }
 
 func init() {
-	typeRegistry.MapExtension(PKTIQ, xml.Name{"http://jabber.org/protocol/disco#info", "query"}, DiscoInfo{})
-	typeRegistry.MapExtension(PKTIQ, xml.Name{"http://jabber.org/protocol/disco#items", "query"}, DiscoItems{})
+	typeRegistry.MapExtension(PKTIQ, xml.Name{NSDiscoInfo, "query"}, DiscoInfo{})
+	typeRegistry.MapExtension(PKTIQ, xml.Name{NSDiscoItems, "query"}, DiscoItems{})
 	typeRegistry.MapExtension(PKTIQ, xml.Name{"urn:ietf:params:xml:ns:xmpp-bind", "bind"}, BindBind{})
 	typeRegistry.MapExtension(PKTIQ, xml.Name{"urn:xmpp:iot:control", "set"}, ControlSet{})
 }
diff --git a/iq_test.go b/iq_test.go
index f78456b..eb3ab2a 100644
--- a/iq_test.go
+++ b/iq_test.go
@@ -43,8 +43,8 @@ func TestGenerateIq(t *testing.T) {
 			Type:     "mqtt",
 		},
 		Features: []xmpp.Feature{
-			{Var: "http://jabber.org/protocol/disco#info"},
-			{Var: "http://jabber.org/protocol/disco#item"},
+			{Var: xmpp.NSDiscoInfo},
+			{Var: xmpp.NSDiscoItems},
 		},
 	}
 	iq.AddPayload(&payload)
diff --git a/msg_chat_markers.go b/msg_chat_markers.go
index 418a09a..fc7f61b 100644
--- a/msg_chat_markers.go
+++ b/msg_chat_markers.go
@@ -7,6 +7,8 @@ Support for:
 - XEP-0333 - Chat Markers: https://xmpp.org/extensions/xep-0333.html
 */
 
+const NSMsgChatMarkers = "urn:xmpp:chat-markers:0"
+
 type Markable struct {
 	MsgExtension
 	XMLName xml.Name `xml:"urn:xmpp:chat-markers:0 markable"`
@@ -31,8 +33,8 @@ type MarkAcknowledged struct {
 }
 
 func init() {
-	typeRegistry.MapExtension(PKTMessage, xml.Name{"urn:xmpp:chat-markers:0", "markable"}, Markable{})
-	typeRegistry.MapExtension(PKTMessage, xml.Name{"urn:xmpp:chat-markers:0", "received"}, MarkReceived{})
-	typeRegistry.MapExtension(PKTMessage, xml.Name{"urn:xmpp:chat-markers:0", "displayed"}, MarkDisplayed{})
-	typeRegistry.MapExtension(PKTMessage, xml.Name{"urn:xmpp:chat-markers:0", "acknowledged"}, MarkAcknowledged{})
+	typeRegistry.MapExtension(PKTMessage, xml.Name{NSMsgChatMarkers, "markable"}, Markable{})
+	typeRegistry.MapExtension(PKTMessage, xml.Name{NSMsgChatMarkers, "received"}, MarkReceived{})
+	typeRegistry.MapExtension(PKTMessage, xml.Name{NSMsgChatMarkers, "displayed"}, MarkDisplayed{})
+	typeRegistry.MapExtension(PKTMessage, xml.Name{NSMsgChatMarkers, "acknowledged"}, MarkAcknowledged{})
 }
diff --git a/msg_receipts.go b/msg_receipts.go
index 76958a8..43d5b7d 100644
--- a/msg_receipts.go
+++ b/msg_receipts.go
@@ -7,6 +7,8 @@ Support for:
 - XEP-0184 - Message Delivery Receipts: https://xmpp.org/extensions/xep-0184.html
 */
 
+const NSMsgReceipts = "urn:xmpp:receipts"
+
 // Used on outgoing message, to tell the recipient that you are requesting a message receipt / ack.
 type ReceiptRequest struct {
 	MsgExtension
@@ -20,6 +22,6 @@ type ReceiptReceived struct {
 }
 
 func init() {
-	typeRegistry.MapExtension(PKTMessage, xml.Name{"urn:xmpp:receipts", "request"}, ReceiptRequest{})
-	typeRegistry.MapExtension(PKTMessage, xml.Name{"urn:xmpp:receipts", "received"}, ReceiptReceived{})
+	typeRegistry.MapExtension(PKTMessage, xml.Name{NSMsgReceipts, "request"}, ReceiptRequest{})
+	typeRegistry.MapExtension(PKTMessage, xml.Name{NSMsgReceipts, "received"}, ReceiptReceived{})
 }