diff --git a/Cargo.toml b/Cargo.toml
index c1f48c00..a7011854 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -26,3 +26,7 @@ try_from = "0.2.2"
 [dependencies.jid]
 version = "0.2.3"
 features = ["minidom"]
+
+[features]
+# Build xmpp-parsers to make components instead of clients.
+component = []
diff --git a/src/forwarding.rs b/src/forwarding.rs
index 86474dd1..2348068b 100644
--- a/src/forwarding.rs
+++ b/src/forwarding.rs
@@ -34,9 +34,9 @@ impl TryFrom<Element> for Forwarded {
         for child in elem.children() {
             if child.is("delay", ns::DELAY) {
                 delay = Some(Delay::try_from(child.clone())?);
-            } else if child.is("message", ns::JABBER_CLIENT) {
+            } else if child.is("message", ns::DEFAULT_NS) {
                 stanza = Some(Message::try_from(child.clone())?);
-            // TODO: also handle the five other possibilities.
+            // TODO: also handle the two other possibilities.
             } else {
                 return Err(Error::ParseError("Unknown child in forwarded element."));
             }
diff --git a/src/iq.rs b/src/iq.rs
index 1fd308c0..7e919985 100644
--- a/src/iq.rs
+++ b/src/iq.rs
@@ -207,7 +207,7 @@ impl TryFrom<Element> for Iq {
     type Err = Error;
 
     fn try_from(root: Element) -> Result<Iq, Error> {
-        if !root.is("iq", ns::JABBER_CLIENT) {
+        if !root.is("iq", ns::DEFAULT_NS) {
             return Err(Error::ParseError("This is not an iq element."));
         }
         let from = get_attr!(root, "from", optional);
@@ -222,7 +222,7 @@ impl TryFrom<Element> for Iq {
                 return Err(Error::ParseError("Wrong number of children in iq element."));
             }
             if type_ == "error" {
-                if elem.is("error", ns::JABBER_CLIENT) {
+                if elem.is("error", ns::DEFAULT_NS) {
                     if error_payload.is_some() {
                         return Err(Error::ParseError("Wrong number of children in iq element."));
                     }
@@ -275,7 +275,7 @@ impl TryFrom<Element> for Iq {
 impl From<Iq> for Element {
     fn from(iq: Iq) -> Element {
         let mut stanza = Element::builder("iq")
-                                 .ns(ns::JABBER_CLIENT)
+                                 .ns(ns::DEFAULT_NS)
                                  .attr("from", iq.from)
                                  .attr("to", iq.to)
                                  .attr("id", iq.id)
@@ -300,7 +300,10 @@ mod tests {
 
     #[test]
     fn test_require_type() {
+        #[cfg(not(feature = "component"))]
         let elem: Element = "<iq xmlns='jabber:client'/>".parse().unwrap();
+        #[cfg(feature = "component")]
+        let elem: Element = "<iq xmlns='jabber:component:accept'/>".parse().unwrap();
         let error = Iq::try_from(elem).unwrap_err();
         let message = match error {
             Error::ParseError(string) => string,
@@ -311,11 +314,16 @@ mod tests {
 
     #[test]
     fn test_get() {
+        #[cfg(not(feature = "component"))]
         let elem: Element = "<iq xmlns='jabber:client' type='get'>
-            <foo/>
+            <foo xmlns='bar'/>
+        </iq>".parse().unwrap();
+        #[cfg(feature = "component")]
+        let elem: Element = "<iq xmlns='jabber:component:accept' type='get'>
+            <foo xmlns='bar'/>
         </iq>".parse().unwrap();
         let iq = Iq::try_from(elem).unwrap();
-        let query: Element = "<foo xmlns='jabber:client'/>".parse().unwrap();
+        let query: Element = "<foo xmlns='bar'/>".parse().unwrap();
         assert_eq!(iq.from, None);
         assert_eq!(iq.to, None);
         assert_eq!(iq.id, None);
@@ -327,9 +335,14 @@ mod tests {
 
     #[test]
     fn test_set() {
+        #[cfg(not(feature = "component"))]
         let elem: Element = "<iq xmlns='jabber:client' type='set'>
             <vCard xmlns='vcard-temp'/>
         </iq>".parse().unwrap();
+        #[cfg(feature = "component")]
+        let elem: Element = "<iq xmlns='jabber:component:accept' type='set'>
+            <vCard xmlns='vcard-temp'/>
+        </iq>".parse().unwrap();
         let iq = Iq::try_from(elem).unwrap();
         let vcard: Element = "<vCard xmlns='vcard-temp'/>".parse().unwrap();
         assert_eq!(iq.from, None);
@@ -343,7 +356,10 @@ mod tests {
 
     #[test]
     fn test_result_empty() {
+        #[cfg(not(feature = "component"))]
         let elem: Element = "<iq xmlns='jabber:client' type='result'/>".parse().unwrap();
+        #[cfg(feature = "component")]
+        let elem: Element = "<iq xmlns='jabber:component:accept' type='result'/>".parse().unwrap();
         let iq = Iq::try_from(elem).unwrap();
         assert_eq!(iq.from, None);
         assert_eq!(iq.to, None);
@@ -356,9 +372,14 @@ mod tests {
 
     #[test]
     fn test_result() {
+        #[cfg(not(feature = "component"))]
         let elem: Element = "<iq xmlns='jabber:client' type='result'>
             <query xmlns='http://jabber.org/protocol/disco#items'/>
         </iq>".parse().unwrap();
+        #[cfg(feature = "component")]
+        let elem: Element = "<iq xmlns='jabber:component:accept' type='result'>
+            <query xmlns='http://jabber.org/protocol/disco#items'/>
+        </iq>".parse().unwrap();
         let iq = Iq::try_from(elem).unwrap();
         let query: Element = "<query xmlns='http://jabber.org/protocol/disco#items'/>".parse().unwrap();
         assert_eq!(iq.from, None);
@@ -372,12 +393,20 @@ mod tests {
 
     #[test]
     fn test_error() {
+        #[cfg(not(feature = "component"))]
         let elem: Element = "<iq xmlns='jabber:client' type='error'>
             <ping xmlns='urn:xmpp:ping'/>
             <error type='cancel'>
                 <service-unavailable xmlns='urn:ietf:params:xml:ns:xmpp-stanzas'/>
             </error>
         </iq>".parse().unwrap();
+        #[cfg(feature = "component")]
+        let elem: Element = "<iq xmlns='jabber:component:accept' type='error'>
+            <ping xmlns='urn:xmpp:ping'/>
+            <error type='cancel'>
+                <service-unavailable xmlns='urn:ietf:params:xml:ns:xmpp-stanzas'/>
+            </error>
+        </iq>".parse().unwrap();
         let iq = Iq::try_from(elem).unwrap();
         assert_eq!(iq.from, None);
         assert_eq!(iq.to, None);
@@ -396,7 +425,10 @@ mod tests {
 
     #[test]
     fn test_children_invalid() {
+        #[cfg(not(feature = "component"))]
         let elem: Element = "<iq xmlns='jabber:client' type='error'></iq>".parse().unwrap();
+        #[cfg(feature = "component")]
+        let elem: Element = "<iq xmlns='jabber:component:accept' type='error'></iq>".parse().unwrap();
         let error = Iq::try_from(elem).unwrap_err();
         let message = match error {
             Error::ParseError(string) => string,
@@ -407,7 +439,10 @@ mod tests {
 
     #[test]
     fn test_serialise() {
+        #[cfg(not(feature = "component"))]
         let elem: Element = "<iq xmlns='jabber:client' type='result'/>".parse().unwrap();
+        #[cfg(feature = "component")]
+        let elem: Element = "<iq xmlns='jabber:component:accept' type='result'/>".parse().unwrap();
         let iq2 = Iq {
             from: None,
             to: None,
@@ -420,7 +455,10 @@ mod tests {
 
     #[test]
     fn test_disco() {
+        #[cfg(not(feature = "component"))]
         let elem: Element = "<iq xmlns='jabber:client' type='get'><query xmlns='http://jabber.org/protocol/disco#info'/></iq>".parse().unwrap();
+        #[cfg(feature = "component")]
+        let elem: Element = "<iq xmlns='jabber:component:accept' type='get'><query xmlns='http://jabber.org/protocol/disco#info'/></iq>".parse().unwrap();
         let iq = Iq::try_from(elem).unwrap();
         let payload = match iq.payload {
             IqType::Get(payload) => IqGetPayload::try_from(payload).unwrap(),
diff --git a/src/mam.rs b/src/mam.rs
index b52e8041..65299b70 100644
--- a/src/mam.rs
+++ b/src/mam.rs
@@ -242,6 +242,7 @@ mod tests {
 
     #[test]
     fn test_result() {
+        #[cfg(not(feature = "component"))]
         let elem: Element = r#"
 <result xmlns='urn:xmpp:mam:2' queryid='f27' id='28482-98726-73623'>
   <forwarded xmlns='urn:xmpp:forward:0'>
@@ -251,6 +252,17 @@ mod tests {
     </message>
   </forwarded>
 </result>
+"#.parse().unwrap();
+        #[cfg(feature = "component")]
+        let elem: Element = r#"
+<result xmlns='urn:xmpp:mam:2' queryid='f27' id='28482-98726-73623'>
+  <forwarded xmlns='urn:xmpp:forward:0'>
+    <delay xmlns='urn:xmpp:delay' stamp='2010-07-10T23:08:25Z'/>
+    <message xmlns='jabber:component:accept' from="witch@shakespeare.lit" to="macbeth@shakespeare.lit">
+      <body>Hail to thee</body>
+    </message>
+  </forwarded>
+</result>
 "#.parse().unwrap();
         Result_::try_from(elem).unwrap();
     }
diff --git a/src/message.rs b/src/message.rs
index 3bf73ae8..5dba839e 100644
--- a/src/message.rs
+++ b/src/message.rs
@@ -49,7 +49,7 @@ impl TryFrom<Element> for MessagePayload {
 
     fn try_from(elem: Element) -> Result<MessagePayload, Error> {
         Ok(match (elem.name().as_ref(), elem.ns().unwrap().as_ref()) {
-            ("error", ns::JABBER_CLIENT) => MessagePayload::StanzaError(StanzaError::try_from(elem)?),
+            ("error", ns::DEFAULT_NS) => MessagePayload::StanzaError(StanzaError::try_from(elem)?),
 
             // XEP-0085
             ("active", ns::CHATSTATES)
@@ -116,9 +116,9 @@ generate_attribute!(MessageType, "type", {
 
 type Lang = String;
 
-generate_elem_id!(Body, "body", ns::JABBER_CLIENT);
-generate_elem_id!(Subject, "subject", ns::JABBER_CLIENT);
-generate_elem_id!(Thread, "thread", ns::JABBER_CLIENT);
+generate_elem_id!(Body, "body", ns::DEFAULT_NS);
+generate_elem_id!(Subject, "subject", ns::DEFAULT_NS);
+generate_elem_id!(Thread, "thread", ns::DEFAULT_NS);
 
 /// The main structure representing the `<message/>` stanza.
 #[derive(Debug, Clone)]
@@ -152,7 +152,7 @@ impl TryFrom<Element> for Message {
     type Err = Error;
 
     fn try_from(root: Element) -> Result<Message, Error> {
-        if !root.is("message", ns::JABBER_CLIENT) {
+        if !root.is("message", ns::DEFAULT_NS) {
             return Err(Error::ParseError("This is not a message element."));
         }
         let from = get_attr!(root, "from", optional);
@@ -164,7 +164,7 @@ impl TryFrom<Element> for Message {
         let mut thread = None;
         let mut payloads = vec!();
         for elem in root.children() {
-            if elem.is("body", ns::JABBER_CLIENT) {
+            if elem.is("body", ns::DEFAULT_NS) {
                 for _ in elem.children() {
                     return Err(Error::ParseError("Unknown child in body element."));
                 }
@@ -173,7 +173,7 @@ impl TryFrom<Element> for Message {
                 if bodies.insert(lang, body).is_some() {
                     return Err(Error::ParseError("Body element present twice for the same xml:lang."));
                 }
-            } else if elem.is("subject", ns::JABBER_CLIENT) {
+            } else if elem.is("subject", ns::DEFAULT_NS) {
                 for _ in elem.children() {
                     return Err(Error::ParseError("Unknown child in subject element."));
                 }
@@ -182,7 +182,7 @@ impl TryFrom<Element> for Message {
                 if subjects.insert(lang, subject).is_some() {
                     return Err(Error::ParseError("Subject element present twice for the same xml:lang."));
                 }
-            } else if elem.is("thread", ns::JABBER_CLIENT) {
+            } else if elem.is("thread", ns::DEFAULT_NS) {
                 if thread.is_some() {
                     return Err(Error::ParseError("Thread element present twice."));
                 }
@@ -210,7 +210,7 @@ impl TryFrom<Element> for Message {
 impl From<Message> for Element {
     fn from(message: Message) -> Element {
         Element::builder("message")
-                .ns(ns::JABBER_CLIENT)
+                .ns(ns::DEFAULT_NS)
                 .attr("from", message.from)
                 .attr("to", message.to)
                 .attr("id", message.id)
@@ -246,7 +246,10 @@ mod tests {
 
     #[test]
     fn test_simple() {
+        #[cfg(not(feature = "component"))]
         let elem: Element = "<message xmlns='jabber:client'/>".parse().unwrap();
+        #[cfg(feature = "component")]
+        let elem: Element = "<message xmlns='jabber:component:accept'/>".parse().unwrap();
         let message = Message::try_from(elem).unwrap();
         assert_eq!(message.from, None);
         assert_eq!(message.to, None);
@@ -257,7 +260,10 @@ mod tests {
 
     #[test]
     fn test_serialise() {
+        #[cfg(not(feature = "component"))]
         let elem: Element = "<message xmlns='jabber:client'/>".parse().unwrap();
+        #[cfg(feature = "component")]
+        let elem: Element = "<message xmlns='jabber:component:accept'/>".parse().unwrap();
         let mut message = Message::new(None);
         message.type_ = MessageType::Normal;
         let elem2 = message.into();
@@ -266,7 +272,10 @@ mod tests {
 
     #[test]
     fn test_body() {
+        #[cfg(not(feature = "component"))]
         let elem: Element = "<message xmlns='jabber:client' to='coucou@example.org' type='chat'><body>Hello world!</body></message>".parse().unwrap();
+        #[cfg(feature = "component")]
+        let elem: Element = "<message xmlns='jabber:component:accept' to='coucou@example.org' type='chat'><body>Hello world!</body></message>".parse().unwrap();
         let elem1 = elem.clone();
         let message = Message::try_from(elem).unwrap();
         assert_eq!(message.bodies[""], Body::from_str("Hello world!").unwrap());
@@ -277,7 +286,10 @@ mod tests {
 
     #[test]
     fn test_serialise_body() {
+        #[cfg(not(feature = "component"))]
         let elem: Element = "<message xmlns='jabber:client' to='coucou@example.org' type='chat'><body>Hello world!</body></message>".parse().unwrap();
+        #[cfg(feature = "component")]
+        let elem: Element = "<message xmlns='jabber:component:accept' to='coucou@example.org' type='chat'><body>Hello world!</body></message>".parse().unwrap();
         let mut message = Message::new(Some(Jid::from_str("coucou@example.org").unwrap()));
         message.bodies.insert(String::from(""), Body::from_str("Hello world!").unwrap());
         let elem2 = message.into();
@@ -286,7 +298,10 @@ mod tests {
 
     #[test]
     fn test_subject() {
+        #[cfg(not(feature = "component"))]
         let elem: Element = "<message xmlns='jabber:client' to='coucou@example.org' type='chat'><subject>Hello world!</subject></message>".parse().unwrap();
+        #[cfg(feature = "component")]
+        let elem: Element = "<message xmlns='jabber:component:accept' to='coucou@example.org' type='chat'><subject>Hello world!</subject></message>".parse().unwrap();
         let elem1 = elem.clone();
         let message = Message::try_from(elem).unwrap();
         assert_eq!(message.subjects[""], Subject::from_str("Hello world!").unwrap());
@@ -297,7 +312,10 @@ mod tests {
 
     #[test]
     fn test_attention() {
+        #[cfg(not(feature = "component"))]
         let elem: Element = "<message xmlns='jabber:client' to='coucou@example.org' type='chat'><attention xmlns='urn:xmpp:attention:0'/></message>".parse().unwrap();
+        #[cfg(feature = "component")]
+        let elem: Element = "<message xmlns='jabber:component:accept' to='coucou@example.org' type='chat'><attention xmlns='urn:xmpp:attention:0'/></message>".parse().unwrap();
         let elem1 = elem.clone();
         let message = Message::try_from(elem).unwrap();
         let elem2 = message.into();
diff --git a/src/ns.rs b/src/ns.rs
index 0d06a1d7..5df077e1 100644
--- a/src/ns.rs
+++ b/src/ns.rs
@@ -47,6 +47,9 @@ pub const REGISTER: &str = "jabber:iq:register";
 /// XEP-0085: Chat State Notifications
 pub const CHATSTATES: &str = "http://jabber.org/protocol/chatstates";
 
+/// XEP-0114: Jabber Component Protocol
+pub const COMPONENT_ACCEPT: &str = "jabber:component:accept";
+
 /// XEP-0115: Entity Capabilities
 pub const CAPS: &str = "http://jabber.org/protocol/caps";
 
@@ -119,3 +122,8 @@ pub const EME: &str = "urn:xmpp:eme:0";
 pub const ECAPS2: &str = "urn:xmpp:caps";
 /// XEP-0390: Entity Capabilities 2.0
 pub const ECAPS2_OPTIMIZE: &str = "urn:xmpp:caps:optimize";
+
+#[cfg(not(feature = "component"))]
+pub const DEFAULT_NS: &str = JABBER_CLIENT;
+#[cfg(feature = "component")]
+pub const DEFAULT_NS: &str = COMPONENT_ACCEPT;
diff --git a/src/presence.rs b/src/presence.rs
index 958a82b3..a1f11fa6 100644
--- a/src/presence.rs
+++ b/src/presence.rs
@@ -95,7 +95,7 @@ impl TryFrom<Element> for PresencePayload {
 
     fn try_from(elem: Element) -> Result<PresencePayload, Error> {
         Ok(match (elem.name().as_ref(), elem.ns().unwrap().as_ref()) {
-            ("error", ns::JABBER_CLIENT) => PresencePayload::StanzaError(StanzaError::try_from(elem)?),
+            ("error", ns::DEFAULT_NS) => PresencePayload::StanzaError(StanzaError::try_from(elem)?),
 
             // XEP-0045
             ("x", ns::MUC) => PresencePayload::Muc(Muc::try_from(elem)?),
@@ -248,7 +248,7 @@ impl TryFrom<Element> for Presence {
     type Err = Error;
 
     fn try_from(root: Element) -> Result<Presence, Error> {
-        if !root.is("presence", ns::JABBER_CLIENT) {
+        if !root.is("presence", ns::DEFAULT_NS) {
             return Err(Error::ParseError("This is not a presence element."));
         }
         let mut show = None;
@@ -264,7 +264,7 @@ impl TryFrom<Element> for Presence {
             payloads: vec!(),
         };
         for elem in root.children() {
-            if elem.is("show", ns::JABBER_CLIENT) {
+            if elem.is("show", ns::DEFAULT_NS) {
                 if show.is_some() {
                     return Err(Error::ParseError("More than one show element in a presence."));
                 }
@@ -275,7 +275,7 @@ impl TryFrom<Element> for Presence {
                     return Err(Error::ParseError("Unknown attribute in show element."));
                 }
                 show = Some(Show::from_str(elem.text().as_ref())?);
-            } else if elem.is("status", ns::JABBER_CLIENT) {
+            } else if elem.is("status", ns::DEFAULT_NS) {
                 for _ in elem.children() {
                     return Err(Error::ParseError("Unknown child in status element."));
                 }
@@ -288,7 +288,7 @@ impl TryFrom<Element> for Presence {
                 if presence.statuses.insert(lang, elem.text()).is_some() {
                     return Err(Error::ParseError("Status element present twice for the same xml:lang."));
                 }
-            } else if elem.is("priority", ns::JABBER_CLIENT) {
+            } else if elem.is("priority", ns::DEFAULT_NS) {
                 if priority.is_some() {
                     return Err(Error::ParseError("More than one priority element in a presence."));
                 }
@@ -316,7 +316,7 @@ impl TryFrom<Element> for Presence {
 impl From<Presence> for Element {
     fn from(presence: Presence) -> Element {
         Element::builder("presence")
-                .ns(ns::JABBER_CLIENT)
+                .ns(ns::DEFAULT_NS)
                 .attr("from", presence.from)
                 .attr("to", presence.to)
                 .attr("id", presence.id)
@@ -343,7 +343,10 @@ mod tests {
 
     #[test]
     fn test_simple() {
+        #[cfg(not(feature = "component"))]
         let elem: Element = "<presence xmlns='jabber:client'/>".parse().unwrap();
+        #[cfg(feature = "component")]
+        let elem: Element = "<presence xmlns='jabber:component:accept'/>".parse().unwrap();
         let presence = Presence::try_from(elem).unwrap();
         assert_eq!(presence.from, None);
         assert_eq!(presence.to, None);
@@ -354,7 +357,10 @@ mod tests {
 
     #[test]
     fn test_serialise() {
-        let elem: Element = "<presence xmlns='jabber:client' type='unavailable'/>".parse().unwrap();
+        #[cfg(not(feature = "component"))]
+        let elem: Element = "<presence xmlns='jabber:client' type='unavailable'/>/>".parse().unwrap();
+        #[cfg(feature = "component")]
+        let elem: Element = "<presence xmlns='jabber:component:accept' type='unavailable'/>/>".parse().unwrap();
         let presence = Presence::new(Type::Unavailable);
         let elem2 = presence.into();
         assert_eq!(elem, elem2);
@@ -362,7 +368,10 @@ mod tests {
 
     #[test]
     fn test_show() {
+        #[cfg(not(feature = "component"))]
         let elem: Element = "<presence xmlns='jabber:client'><show>chat</show></presence>".parse().unwrap();
+        #[cfg(feature = "component")]
+        let elem: Element = "<presence xmlns='jabber:component:accept'><show>chat</show></presence>".parse().unwrap();
         let presence = Presence::try_from(elem).unwrap();
         assert_eq!(presence.payloads.len(), 0);
         assert_eq!(presence.show, Show::Chat);
@@ -370,8 +379,10 @@ mod tests {
 
     #[test]
     fn test_missing_show_value() {
-        // "online" used to be a pretty common mistake.
+        #[cfg(not(feature = "component"))]
         let elem: Element = "<presence xmlns='jabber:client'><show/></presence>".parse().unwrap();
+        #[cfg(feature = "component")]
+        let elem: Element = "<presence xmlns='jabber:component:accept'><show/></presence>".parse().unwrap();
         let error = Presence::try_from(elem).unwrap_err();
         let message = match error {
             Error::ParseError(string) => string,
@@ -383,7 +394,10 @@ mod tests {
     #[test]
     fn test_invalid_show() {
         // "online" used to be a pretty common mistake.
+        #[cfg(not(feature = "component"))]
         let elem: Element = "<presence xmlns='jabber:client'><show>online</show></presence>".parse().unwrap();
+        #[cfg(feature = "component")]
+        let elem: Element = "<presence xmlns='jabber:component:accept'><show>online</show></presence>".parse().unwrap();
         let error = Presence::try_from(elem).unwrap_err();
         let message = match error {
             Error::ParseError(string) => string,
@@ -394,7 +408,10 @@ mod tests {
 
     #[test]
     fn test_empty_status() {
+        #[cfg(not(feature = "component"))]
         let elem: Element = "<presence xmlns='jabber:client'><status/></presence>".parse().unwrap();
+        #[cfg(feature = "component")]
+        let elem: Element = "<presence xmlns='jabber:component:accept'><status/></presence>".parse().unwrap();
         let presence = Presence::try_from(elem).unwrap();
         assert_eq!(presence.payloads.len(), 0);
         assert_eq!(presence.statuses.len(), 1);
@@ -403,7 +420,10 @@ mod tests {
 
     #[test]
     fn test_status() {
+        #[cfg(not(feature = "component"))]
         let elem: Element = "<presence xmlns='jabber:client'><status>Here!</status></presence>".parse().unwrap();
+        #[cfg(feature = "component")]
+        let elem: Element = "<presence xmlns='jabber:component:accept'><status>Here!</status></presence>".parse().unwrap();
         let presence = Presence::try_from(elem).unwrap();
         assert_eq!(presence.payloads.len(), 0);
         assert_eq!(presence.statuses.len(), 1);
@@ -412,7 +432,10 @@ mod tests {
 
     #[test]
     fn test_multiple_statuses() {
+        #[cfg(not(feature = "component"))]
         let elem: Element = "<presence xmlns='jabber:client'><status>Here!</status><status xml:lang='fr'>Là!</status></presence>".parse().unwrap();
+        #[cfg(feature = "component")]
+        let elem: Element = "<presence xmlns='jabber:component:accept'><status>Here!</status><status xml:lang='fr'>Là!</status></presence>".parse().unwrap();
         let presence = Presence::try_from(elem).unwrap();
         assert_eq!(presence.payloads.len(), 0);
         assert_eq!(presence.statuses.len(), 2);
@@ -422,7 +445,10 @@ mod tests {
 
     #[test]
     fn test_invalid_multiple_statuses() {
+        #[cfg(not(feature = "component"))]
         let elem: Element = "<presence xmlns='jabber:client'><status xml:lang='fr'>Here!</status><status xml:lang='fr'>Là!</status></presence>".parse().unwrap();
+        #[cfg(feature = "component")]
+        let elem: Element = "<presence xmlns='jabber:component:accept'><status xml:lang='fr'>Here!</status><status xml:lang='fr'>Là!</status></presence>".parse().unwrap();
         let error = Presence::try_from(elem).unwrap_err();
         let message = match error {
             Error::ParseError(string) => string,
@@ -433,7 +459,10 @@ mod tests {
 
     #[test]
     fn test_priority() {
+        #[cfg(not(feature = "component"))]
         let elem: Element = "<presence xmlns='jabber:client'><priority>-1</priority></presence>".parse().unwrap();
+        #[cfg(feature = "component")]
+        let elem: Element = "<presence xmlns='jabber:component:accept'><priority>-1</priority></presence>".parse().unwrap();
         let presence = Presence::try_from(elem).unwrap();
         assert_eq!(presence.payloads.len(), 0);
         assert_eq!(presence.priority, -1i8);
@@ -441,7 +470,10 @@ mod tests {
 
     #[test]
     fn test_invalid_priority() {
+        #[cfg(not(feature = "component"))]
         let elem: Element = "<presence xmlns='jabber:client'><priority>128</priority></presence>".parse().unwrap();
+        #[cfg(feature = "component")]
+        let elem: Element = "<presence xmlns='jabber:component:accept'><priority>128</priority></presence>".parse().unwrap();
         let error = Presence::try_from(elem).unwrap_err();
         match error {
             Error::ParseIntError(_) => (),
@@ -451,7 +483,10 @@ mod tests {
 
     #[test]
     fn test_unknown_child() {
+        #[cfg(not(feature = "component"))]
         let elem: Element = "<presence xmlns='jabber:client'><test xmlns='invalid'/></presence>".parse().unwrap();
+        #[cfg(feature = "component")]
+        let elem: Element = "<presence xmlns='jabber:component:accept'><test xmlns='invalid'/></presence>".parse().unwrap();
         let presence = Presence::try_from(elem).unwrap();
         let payload = &presence.payloads[0];
         assert!(payload.is("test", "invalid"));
@@ -459,7 +494,10 @@ mod tests {
 
     #[test]
     fn test_invalid_status_child() {
+        #[cfg(not(feature = "component"))]
         let elem: Element = "<presence xmlns='jabber:client'><status><coucou/></status></presence>".parse().unwrap();
+        #[cfg(feature = "component")]
+        let elem: Element = "<presence xmlns='jabber:component:accept'><status><coucou/></status></presence>".parse().unwrap();
         let error = Presence::try_from(elem).unwrap_err();
         let message = match error {
             Error::ParseError(string) => string,
@@ -470,7 +508,10 @@ mod tests {
 
     #[test]
     fn test_invalid_attribute() {
+        #[cfg(not(feature = "component"))]
         let elem: Element = "<presence xmlns='jabber:client'><status coucou=''/></presence>".parse().unwrap();
+        #[cfg(feature = "component")]
+        let elem: Element = "<presence xmlns='jabber:component:accept'><status coucou=''/></presence>".parse().unwrap();
         let error = Presence::try_from(elem).unwrap_err();
         let message = match error {
             Error::ParseError(string) => string,
@@ -485,7 +526,7 @@ mod tests {
         let mut presence = Presence::new(Type::Unavailable);
         presence.statuses.insert(String::from(""), status);
         let elem: Element = presence.into();
-        assert!(elem.is("presence", ns::JABBER_CLIENT));
-        assert!(elem.children().next().unwrap().is("status", ns::JABBER_CLIENT));
+        assert!(elem.is("presence", ns::DEFAULT_NS));
+        assert!(elem.children().next().unwrap().is("status", ns::DEFAULT_NS));
     }
 }
diff --git a/src/stanza_error.rs b/src/stanza_error.rs
index 0c7ca7e8..8ca9c862 100644
--- a/src/stanza_error.rs
+++ b/src/stanza_error.rs
@@ -125,7 +125,7 @@ impl TryFrom<Element> for StanzaError {
     type Err = Error;
 
     fn try_from(elem: Element) -> Result<StanzaError, Error> {
-        if !elem.is("error", ns::JABBER_CLIENT) {
+        if !elem.is("error", ns::DEFAULT_NS) {
             return Err(Error::ParseError("This is not an error element."));
         }
 
@@ -175,7 +175,7 @@ impl TryFrom<Element> for StanzaError {
 impl From<StanzaError> for Element {
     fn from(err: StanzaError) -> Element {
         let mut root = Element::builder("error")
-                               .ns(ns::JABBER_CLIENT)
+                               .ns(ns::DEFAULT_NS)
                                .attr("type", err.type_)
                                .attr("by", err.by)
                                .append(err.defined_condition)
@@ -201,7 +201,10 @@ mod tests {
 
     #[test]
     fn test_simple() {
+        #[cfg(not(feature = "component"))]
         let elem: Element = "<error xmlns='jabber:client' type='cancel'><undefined-condition xmlns='urn:ietf:params:xml:ns:xmpp-stanzas'/></error>".parse().unwrap();
+        #[cfg(feature = "component")]
+        let elem: Element = "<error xmlns='jabber:component:accept' type='cancel'><undefined-condition xmlns='urn:ietf:params:xml:ns:xmpp-stanzas'/></error>".parse().unwrap();
         let error = StanzaError::try_from(elem).unwrap();
         assert_eq!(error.type_, ErrorType::Cancel);
         assert_eq!(error.defined_condition, DefinedCondition::UndefinedCondition);
@@ -209,7 +212,10 @@ mod tests {
 
     #[test]
     fn test_invalid_type() {
+        #[cfg(not(feature = "component"))]
         let elem: Element = "<error xmlns='jabber:client'/>".parse().unwrap();
+        #[cfg(feature = "component")]
+        let elem: Element = "<error xmlns='jabber:component:accept'/>".parse().unwrap();
         let error = StanzaError::try_from(elem).unwrap_err();
         let message = match error {
             Error::ParseError(string) => string,
@@ -217,7 +223,10 @@ mod tests {
         };
         assert_eq!(message, "Required attribute 'type' missing.");
 
+        #[cfg(not(feature = "component"))]
         let elem: Element = "<error xmlns='jabber:client' type='coucou'/>".parse().unwrap();
+        #[cfg(feature = "component")]
+        let elem: Element = "<error xmlns='jabber:component:accept' type='coucou'/>".parse().unwrap();
         let error = StanzaError::try_from(elem).unwrap_err();
         let message = match error {
             Error::ParseError(string) => string,
@@ -228,7 +237,10 @@ mod tests {
 
     #[test]
     fn test_invalid_condition() {
+        #[cfg(not(feature = "component"))]
         let elem: Element = "<error xmlns='jabber:client' type='cancel'/>".parse().unwrap();
+        #[cfg(feature = "component")]
+        let elem: Element = "<error xmlns='jabber:component:accept' type='cancel'/>".parse().unwrap();
         let error = StanzaError::try_from(elem).unwrap_err();
         let message = match error {
             Error::ParseError(string) => string,