diff --git a/src/dav/caltypes.rs b/src/dav/caltypes.rs
index c672370..a68936c 100644
--- a/src/dav/caltypes.rs
+++ b/src/dav/caltypes.rs
@@ -8,6 +8,7 @@ impl Extension for CalExtension {
     type Error = Violation;
     type Property = Property;
     type PropertyRequest = Property; //@FIXME
+    type ResourceType = Property; //@FIXME
 }
 
 pub enum Violation {
diff --git a/src/dav/encoder.rs b/src/dav/encoder.rs
index 399a92e..5392b18 100644
--- a/src/dav/encoder.rs
+++ b/src/dav/encoder.rs
@@ -198,8 +198,15 @@ impl<C: Context> QuickWritable<C> for Property<C> {
         match self {
             CreationDate(date) => unimplemented!(),
             DisplayName(name) => unimplemented!(),
-            //@FIXME not finished
-            _ => unimplemented!(),
+            GetContentLanguage(lang) => unimplemented!(),
+            GetContentLength(len) => unimplemented!(),
+            GetContentType(ct) => unimplemented!(),
+            GetEtag(et) => unimplemented!(),
+            GetLastModified(dt) => unimplemented!(),
+            LockDiscovery(locks) => unimplemented!(),
+            ResourceType(res) => unimplemented!(),
+            SupportedLock(sup) => unimplemented!(),
+            Extension(inner) => unimplemented!(),
         };
         Ok(())
     }
diff --git a/src/dav/types.rs b/src/dav/types.rs
index 8807658..59cfcd6 100644
--- a/src/dav/types.rs
+++ b/src/dav/types.rs
@@ -8,6 +8,7 @@ pub trait Extension {
     type Error;
     type Property;
     type PropertyRequest;
+    type ResourceType;
 }
 
 /// No extension
@@ -18,6 +19,7 @@ impl Extension for NoExtension {
     type Error = Disabled;
     type Property = Disabled;
     type PropertyRequest = Disabled;
+    type ResourceType = Disabled;
  }
 
 /// 14.1.  activelock XML Element
@@ -849,7 +851,7 @@ pub enum Property<T: Extension> {
     ///       <x:collection/>
     ///       <f:search-results xmlns:f="http://www.example.com/ns"/>
     ///   </x:resourcetype>
-    ResourceType(Collection),
+    ResourceType(Vec<ResourceType<T>>),
 
     /// 15.10.  supportedlock Property
     ///
@@ -880,4 +882,7 @@ pub enum Property<T: Extension> {
     Extension(T::Property),
 }
 
-
+pub enum ResourceType<T: Extension> {
+    Collection,
+    Extension(T::ResourceType),
+}