diff --git a/src/dav/calencoder.rs b/src/dav/calencoder.rs
index 73db4fa..a701fe1 100644
--- a/src/dav/calencoder.rs
+++ b/src/dav/calencoder.rs
@@ -278,8 +278,6 @@ impl<C: CalContext> QuickWritable<C> for Violation {
             Self::SupportedCalendarData => atom("supported-calendar-data").await,
             Self::ValidCalendarObjectResource => atom("valid-calendar-object-resource").await,
             Self::SupportedCalendarComponent => atom("supported-calendar-component").await,
-            Self::ValidCalendarObjectResource => atom("valid-calendar-object-resource").await,
-            Self::SupportedCalendarComponent => atom("SupportedCalendarComponent").await,
             Self::NoUidConflict(href) => {
                 let start = ctx.create_cal_element("no-uid-conflict");
                 let end = start.to_end();
@@ -391,43 +389,82 @@ impl<C: CalContext> QuickWritable<C> for CalendarDataEmpty {
 
 impl<C: CalContext> QuickWritable<C> for Comp {
     async fn write(&self, xml: &mut Writer<impl AsyncWrite+Unpin>, ctx: C) -> Result<(), QError> {
-        unimplemented!();
+        let mut start = ctx.create_cal_element("calendar-data");
+        start.push_attribute(("name", self.name.as_str()));
+        let end = start.to_end();
+        xml.write_event_async(Event::Start(start.clone())).await?;
+        self.prop_kind.write(xml, ctx.child()).await?;
+        self.comp_kind.write(xml, ctx.child()).await?;
+        xml.write_event_async(Event::End(end)).await
     }
 }
 
 impl<C: CalContext> QuickWritable<C> for CompSupport {
     async fn write(&self, xml: &mut Writer<impl AsyncWrite+Unpin>, ctx: C) -> Result<(), QError> {
-        unimplemented!();
+        let mut empty = ctx.create_cal_element("comp");
+        empty.push_attribute(("name", self.0.as_str()));
+        xml.write_event_async(Event::Empty(empty)).await
     }
 }
 
 impl<C: CalContext> QuickWritable<C> for CompKind {
     async fn write(&self, xml: &mut Writer<impl AsyncWrite+Unpin>, ctx: C) -> Result<(), QError> {
-        unimplemented!();
+        match self {
+            Self::AllComp => xml.write_event_async(Event::Empty(ctx.create_cal_element("allcomp"))).await,
+            Self::Comp(many_comp) => {
+                for comp in many_comp.iter() {
+                    // Required: recursion in an async fn requires boxing
+                    // rustc --explain E0733
+                    Box::pin(comp.write(xml, ctx.child())).await?;
+                }
+                Ok(())
+            }
+        }
     }
 }
 
 impl<C: CalContext> QuickWritable<C> for PropKind {
     async fn write(&self, xml: &mut Writer<impl AsyncWrite+Unpin>, ctx: C) -> Result<(), QError> {
-        unimplemented!();
+        match self {
+            Self::AllProp => xml.write_event_async(Event::Empty(ctx.create_cal_element("allprop"))).await,
+            Self::Prop(many_prop) => {
+                for prop in many_prop.iter() {
+                    prop.write(xml, ctx.child()).await?;
+                }
+                Ok(())
+            }
+        }
     }
 }
 
 impl<C: CalContext> QuickWritable<C> for CalProp {
     async fn write(&self, xml: &mut Writer<impl AsyncWrite+Unpin>, ctx: C) -> Result<(), QError> {
-        unimplemented!();
+        let mut empty = ctx.create_cal_element("prop");
+        empty.push_attribute(("name", self.name.0.as_str()));
+        match self.novalue {
+            None => (),
+            Some(true) => empty.push_attribute(("novalue", "yes")),
+            Some(false) => empty.push_attribute(("novalue", "no")),
+        }
+        xml.write_event_async(Event::Empty(empty)).await
     }
 }
 
 impl<C: CalContext> QuickWritable<C> for RecurrenceModifier {
     async fn write(&self, xml: &mut Writer<impl AsyncWrite+Unpin>, ctx: C) -> Result<(), QError> {
-        unimplemented!();
+        match self {
+            Self::Expand(exp) => exp.write(xml, ctx).await,
+            Self::LimitRecurrenceSet(lrs) => lrs.write(xml, ctx).await,
+        }
     }
 }
 
 impl<C: CalContext> QuickWritable<C> for Expand {
     async fn write(&self, xml: &mut Writer<impl AsyncWrite+Unpin>, ctx: C) -> Result<(), QError> {
-        unimplemented!();
+        let mut empty = ctx.create_cal_element("expand");
+        empty.push_attribute(("start", format!("{}", self.0.format(ICAL_DATETIME_FMT)).as_str()));
+        empty.push_attribute(("end", format!("{}", self.1.format(ICAL_DATETIME_FMT)).as_str()));
+        xml.write_event_async(Event::Empty(empty)).await
     }
 }
 
diff --git a/src/dav/caltypes.rs b/src/dav/caltypes.rs
index 97d75c5..5668201 100644
--- a/src/dav/caltypes.rs
+++ b/src/dav/caltypes.rs
@@ -846,9 +846,9 @@ pub struct CalendarDataSupport {
 /// in the "urn:ietf:params:xml:ns:caldav" namespace instead of the
 /// "DAV:" namespace.
 pub struct Comp {
-    name: Component,
-    prop_kind: PropKind,
-    comp_kind: CompKind,
+    pub name: Component,
+    pub prop_kind: PropKind,
+    pub comp_kind: CompKind,
 }
 
 /// For SupportedCalendarComponentSet
@@ -864,7 +864,7 @@ pub struct Comp {
 ///     <C:comp name="VEVENT"/>
 ///     <C:comp name="VTODO"/>
 /// </C:supported-calendar-component-set>
-pub struct CompSupport(Component);
+pub struct CompSupport(pub Component);
 
 /// Name:  allcomp
 ///
@@ -932,8 +932,8 @@ pub enum PropKind {
 /// defined in the "urn:ietf:params:xml:ns:caldav" namespace instead
 /// of the "DAV:" namespace.
 pub struct CalProp {
-    name: ComponentProperty,
-    novalue: bool,
+    pub name: ComponentProperty,
+    pub novalue: Option<bool>,
 }
 
 pub enum RecurrenceModifier {
@@ -981,7 +981,7 @@ pub enum RecurrenceModifier {
 ///                  end   CDATA #REQUIRED>
 /// start value: an iCalendar "date with UTC time"
 /// end value: an iCalendar "date with UTC time"
-pub struct Expand(DateTime<Utc>, DateTime<Utc>);
+pub struct Expand(pub DateTime<Utc>, pub DateTime<Utc>);
 
 /// CALDAV:limit-recurrence-set XML Element
 ///
@@ -1348,11 +1348,24 @@ pub enum Component {
     VAlarm,
     Unknown(String),
 }
+impl  Component {
+    pub fn as_str<'a>(&'a self) -> &'a str {
+        match self {
+            Self::VCalendar => "VCALENDAR",
+            Self::VJournal => "VJOURNAL",
+            Self::VFreeBusy => "VFREEBUSY",
+            Self::VEvent => "VEVENT",
+            Self::VTodo => "VTODO",
+            Self::VAlarm => "VALARM",
+            Self::Unknown(c) => c,
+        }
+    }
+}
 
 /// name="VERSION", name="SUMMARY", etc.
 /// Can be set on different objects: VCalendar, VEvent, etc.
 /// Might be replaced by an enum later
-pub struct ComponentProperty(String);
+pub struct ComponentProperty(pub String);
 
 /// like PARSTAT
 pub struct PropertyParameter(String);
diff --git a/src/dav/encoder.rs b/src/dav/encoder.rs
index f842734..7778d61 100644
--- a/src/dav/encoder.rs
+++ b/src/dav/encoder.rs
@@ -37,16 +37,16 @@ impl Context for NoExtension {
         }
         start
     }
-    async fn hook_error(&self, err: &Disabled, xml: &mut Writer<impl AsyncWrite+Unpin>) -> Result<(), QError> {
+    async fn hook_error(&self, _err: &Disabled, _xml: &mut Writer<impl AsyncWrite+Unpin>) -> Result<(), QError> {
         unreachable!();
     }
-    async fn hook_property(&self, prop: &Disabled, xml: &mut Writer<impl AsyncWrite+Unpin>) -> Result<(), QError> {
+    async fn hook_property(&self, _prop: &Disabled, _xml: &mut Writer<impl AsyncWrite+Unpin>) -> Result<(), QError> {
         unreachable!();
     }
-    async fn hook_propertyrequest(&self, prop: &Disabled, xml: &mut Writer<impl AsyncWrite+Unpin>) -> Result<(), QError> {
+    async fn hook_propertyrequest(&self, _prop: &Disabled, _xml: &mut Writer<impl AsyncWrite+Unpin>) -> Result<(), QError> {
         unreachable!();
     }
-    async fn hook_resourcetype(&self, restype: &Disabled, xml: &mut Writer<impl AsyncWrite+Unpin>) -> Result<(), QError> {
+    async fn hook_resourcetype(&self, _restype: &Disabled, _xml: &mut Writer<impl AsyncWrite+Unpin>) -> Result<(), QError> {
         unreachable!();
     }
 }