diff --git a/Cargo.toml b/Cargo.toml
index 279d1f6..3f02d12 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,6 +9,7 @@ edition = "2021"
 axum = "0.7.3"
 chrono = { version = "0.4.31", features = ["serde"] }
 clap = { version = "4.5.3", features = ["derive"] }
+reqwest = { version = "0.11.26", features = ["json"] }
 sea-orm = { version = "0.12.14", features = ["macros", "sqlx-sqlite", "runtime-tokio-rustls"] }
 sea-orm-migration = "0.12.15"
 serde = { version = "1.0.193", features = ["derive"] }
diff --git a/src/activitystream/activity.rs b/src/activitystream/activity.rs
deleted file mode 100644
index 004feba..0000000
--- a/src/activitystream/activity.rs
+++ /dev/null
@@ -1,56 +0,0 @@
-pub trait Activity : super::Object {
-	fn activity_type(&self) -> Option<super::types::ActivityType> { None }
-
-	fn actor_id(&self) -> Option<&str> { None }
-	fn actor(&self) -> Option<super::LinkedObject<impl super::Object>> { None::<super::LinkedObject<()>> }
-
-	fn object_id(&self) -> Option<&str> { None }
-	fn object(&self) -> Option<super::LinkedObject<impl super::Object>> { None::<super::LinkedObject<()>> }
-
-	fn target(&self) -> Option<&str> { None }
-}
-
-impl Activity for serde_json::Value {
-	fn activity_type(&self) -> Option<super::types::ActivityType> {
-		let serde_json::Value::String(t) = self.get("type")? else { return None };
-		super::types::ActivityType::try_from(t.as_str()).ok()
-	}
-
-	fn object(&self) -> Option<super::LinkedObject<impl super::Object>> {
-		let obj = self.get("object")?;
-		match obj {
-			serde_json::Value::Object(_) => Some(obj.clone().into()),
-			_ => None,
-		}
-	}
-
-	fn object_id(&self) -> Option<&str> {
-		match self.get("object")? {
-			serde_json::Value::Object(map) => match map.get("id")? {
-				serde_json::Value::String(id) => Some(id),
-				_ => None,
-			},
-			serde_json::Value::String(id) => Some(id),
-			_ => None,
-		}
-	}
-
-	fn actor(&self) -> Option<super::LinkedObject<impl super::Object>> {
-		let obj = self.get("actor")?;
-		match obj {
-			serde_json::Value::Object(_) => Some(obj.clone().into()),
-			_ => None,
-		}
-	}
-
-	fn actor_id(&self) -> Option<&str> {
-		match self.get("actor")? {
-			serde_json::Value::Object(map) => match map.get("id")? {
-				serde_json::Value::String(id) => Some(id),
-				_ => None,
-			},
-			serde_json::Value::String(id) => Some(id),
-			_ => None,
-		}
-	}
-}
diff --git a/src/activitystream/actor.rs b/src/activitystream/actor.rs
deleted file mode 100644
index 70a2a75..0000000
--- a/src/activitystream/actor.rs
+++ /dev/null
@@ -1,3 +0,0 @@
-pub trait Actor : super::Object {
-	fn actor_type(&self) -> Option<super::ActorType> { None }
-}
diff --git a/src/activitystream/link.rs b/src/activitystream/link.rs
index 4aa65b5..9041118 100644
--- a/src/activitystream/link.rs
+++ b/src/activitystream/link.rs
@@ -1,4 +1,13 @@
-pub trait Link {
+use crate::strenum;
+
+strenum! {
+	pub enum LinkType {
+		Link,
+		Mention
+	}
+}
+
+pub trait Link : super::Base {
 	fn href(&self) -> &str;
 	fn rel(&self) -> Option<&str> { None }
 	fn media_type(&self) -> Option<&str> { None } // also in obj
@@ -9,27 +18,6 @@ pub trait Link {
 	fn preview(&self) -> Option<&str> { None }    // also in obj
 }
 
-pub enum LinkedObject<T> {
-	Object(T),
-	Link(Box<dyn Link>),
-}
-
-impl<T> LinkedObject<T>
-where
-	T : for<'de> serde::Deserialize<'de>,
-{
-	pub async fn resolve(self) -> T {
-		match self {
-			LinkedObject::Object(o) => o,
-			LinkedObject::Link(l) =>
-				reqwest::get(l.href())
-					.await.unwrap()
-					.json::<T>()
-					.await.unwrap(),
-		}
-	}
-}
-
 impl Link for String {
 	fn href(&self) -> &str {
 		self
@@ -53,14 +41,3 @@ impl Link for serde_json::Value {
 
 	// ... TODO!
 }
-
-impl From<serde_json::Value> for LinkedObject<serde_json::Value> {
-	fn from(value: serde_json::Value) -> Self {
-		if value.is_string() || value.get("href").is_some() {
-			Self::Link(Box::new(value))
-		} else {
-			Self::Object(value)
-		}
-	}
-}
-
diff --git a/src/activitystream/mod.rs b/src/activitystream/mod.rs
index 6f2c4df..6bb5356 100644
--- a/src/activitystream/mod.rs
+++ b/src/activitystream/mod.rs
@@ -1,62 +1,48 @@
-pub mod object;
-pub use object::Object;
-
-
-pub mod actor;
-pub use actor::Actor;
-
-
-pub mod activity;
-pub use activity::Activity;
-
-
 pub mod types;
-pub use types::{BaseType, ObjectType, ActivityType, ActorType};
-
 
 pub mod link;
-pub use link::{Link, LinkedObject};
+pub use link::{Link, LinkType};
 
-pub trait ToJson : Object {
-	fn json(&self) -> serde_json::Value;
-}
+pub mod object;
+pub use object::{Object, ObjectType};
 
-impl<T> ToJson for T where T : Object {
-	fn json(&self) -> serde_json::Value {
-		let mut map = serde_json::Map::new();
-		let mp = &mut map;
+pub mod node;
+pub use node::Node;
 
-		put_str(mp, "id", self.id());
-		put_str(mp, "attributedTo", self.attributed_to());
-		put_str(mp, "name", self.name());
-		put_str(mp, "summary", self.summary());
-		put_str(mp, "content", self.content());
+use crate::strenum;
 
-		if let Some(t) = self.full_type() {
-			map.insert(
-				"type".to_string(),
-				serde_json::Value::String(format!("{t:?}")),
-			);
-		}
+strenum! {
+	pub enum BaseType {
+		Invalid
 
-		if let Some(published) = self.published() {
-			map.insert(
-				"published".to_string(),
-				serde_json::Value::String(published.to_rfc3339()),
-			);
-		}
-
-		// ... TODO!
-
-		serde_json::Value::Object(map)
+		Object(ObjectType),
+		Link(LinkType)
 	}
 }
 
-fn put_str(map: &mut serde_json::Map<String, serde_json::Value>, k: &str, v: Option<&str>) {
-	if let Some(v) = v {
-		map.insert(
-			k.to_string(),
-			serde_json::Value::String(v.to_string()),
-		);
+pub trait Base {
+	fn id(&self) -> Option<&str> { None }
+	fn base_type(&self) -> Option<BaseType> { None }
+}
+
+impl Base for () {}
+
+impl Base for String {
+	fn id(&self) -> Option<&str> {
+		Some(self)
+	}
+
+	fn base_type(&self) -> Option<BaseType> {
+		Some(BaseType::Link(LinkType::Link))
+	}
+}
+
+impl Base for serde_json::Value {
+	fn id(&self) -> Option<&str> {
+		self.get("id")?.as_str()
+	}
+
+	fn base_type(&self) -> Option<BaseType> {
+		self.get("type")?.as_str()?.try_into().ok()
 	}
 }
diff --git a/src/activitystream/node.rs b/src/activitystream/node.rs
new file mode 100644
index 0000000..8d70a3e
--- /dev/null
+++ b/src/activitystream/node.rs
@@ -0,0 +1,166 @@
+#[derive(Debug, thiserror::Error)]
+pub enum NodeResolutionError {
+	#[error("error fetching object: {0}")]
+	FetchError(#[from] reqwest::Error),
+
+	#[error("empty array")]
+	EmptyArray,
+
+	#[error("field not present")]
+	Empty,
+}
+
+pub enum Node<T> {
+	Array(Vec<T>),
+	Object(T),
+	Link(Box<dyn super::Link>),
+	Empty,
+}
+
+impl<T> From<Option<T>> for Node<T> {
+	fn from(value: Option<T>) -> Self {
+		match value {
+			Some(x) => Node::Object(x),
+			None => Node::Empty,
+		}
+	}
+}
+
+impl<T> Node<T> {
+	pub fn first(&self) -> Option<&T> {
+		match self {
+			Node::Empty | Node::Link(_) => None,
+			Node::Object(x) => Some(x),
+			Node::Array(v) => v.first(),
+		}
+	}
+
+	pub fn items(&self) -> Option<Vec<&T>> {
+		match self {
+			Node::Empty | Node::Link(_) => None,
+			Node::Object(x) => Some(vec![x]),
+			Node::Array(v) =>
+				Some(v.iter().map(|x| &x).collect()),
+		}
+	}
+}
+
+impl<T> Node<T>
+where
+	T : super::Base
+{
+	pub fn id(&self) -> Option<&str> {
+		match self {
+			Node::Array(v) => v.first()?.id(),
+			Node::Link(x) => Some(x.href()),
+			Node::Object(x) => x.id(),
+			Node::Empty => None,
+		}
+	}
+}
+
+impl<T> Node<T>
+where
+	T : Clone + for<'de> serde::Deserialize<'de>,
+{
+	pub async fn resolve(self) -> Result<T, NodeResolutionError> {
+		match self {
+			Node::Empty => Err(NodeResolutionError::Empty),
+			Node::Object(object) => Ok(object),
+			Node::Array(array) => Ok(
+				array
+					.first()
+					.ok_or(NodeResolutionError::EmptyArray)?
+					.clone()
+			),
+			Node::Link(link) => Ok(
+				reqwest::get(link.href())
+					.await?
+					.json::<T>()
+					.await?
+			),
+		}
+	}
+}
+
+pub trait NodeExtractor {
+	fn node(&self, id: &str) -> Node<serde_json::Value>;
+	fn node_vec(&self, id: &str) -> Node<serde_json::Value>;
+}
+
+impl NodeExtractor for serde_json::Value {
+	fn node(&self, id: &str) -> Node<serde_json::Value> {
+		match self.get(id) {
+			None => Node::Empty,
+			Some(x) => match Node::new(x.clone()) {
+				Err(e) => Node::Empty,
+				Ok(x) => x,
+			}
+		}
+	}
+
+	fn node_vec(&self, id: &str) -> Node<serde_json::Value> {
+		match self.get(id) {
+			None => Node::Empty,
+			Some(x) => match Node::many(x.clone()) {
+				Err(e) => Node::Empty,
+				Ok(x) => x,
+			}
+		}
+	}
+}
+
+#[derive(Debug, thiserror::Error)]
+#[error("json object is wrongly structured")]
+pub struct JsonStructureError;
+
+impl Node<serde_json::Value> {
+	pub fn new(value: serde_json::Value) -> Result<Self, JsonStructureError> {
+		if !(value.is_string() || value.is_object()) {
+			return Err(JsonStructureError);
+		}
+		if value.is_string() || value.get("href").is_some() {
+			Ok(Self::Link(Box::new(value)))
+		} else {
+			Ok(Self::Object(value))
+		}
+	}
+
+	pub fn many(value: serde_json::Value) -> Result<Vec<Self>, JsonStructureError> {
+		if let serde_json::Value::Array(arr) = value {
+			Ok(
+				arr
+					.into_iter()
+					.filter_map(|x| Self::new(x.clone()).ok())
+					.collect()
+			)
+		} else {
+			Ok(vec![Self::new(value)?])
+		}
+	}
+}
+
+
+pub(crate) trait InsertStr {
+	fn insert_str(&mut self, k: &str, v: Option<&str>);
+	fn insert_timestr(&mut self, k: &str, t: Option<chrono::DateTime<chrono::Utc>>);
+}
+impl InsertStr for serde_json::Map<String, serde_json::Value> {
+	fn insert_str(&mut self, k: &str, v: Option<&str>) {
+		if let Some(v) = v {
+			self.insert(
+				k.to_string(),
+				serde_json::Value::String(v.to_string()),
+			);
+		}
+	}
+
+	fn insert_timestr(&mut self, k: &str, t: Option<chrono::DateTime<chrono::Utc>>) {
+		if let Some(published) = t {
+			self.insert(
+				"published".to_string(),
+				serde_json::Value::String(published.to_rfc3339()),
+			);
+		}
+	}
+}
diff --git a/src/activitystream/object.rs b/src/activitystream/object.rs
deleted file mode 100644
index 35d8b10..0000000
--- a/src/activitystream/object.rs
+++ /dev/null
@@ -1,47 +0,0 @@
-pub trait Object {
-	fn id(&self) -> Option<&str> { None }
-	fn full_type(&self) -> Option<super::BaseType> { None }
-	fn attachment (&self) -> Option<&str> { None }
-	fn attributed_to (&self) -> Option<&str> { None }
-	fn audience (&self) -> Option<&str> { None }
-	fn content (&self) -> Option<&str> { None } 
-	fn context (&self) -> Option<&str> { None }
-	fn name (&self) -> Option<&str> { None }
-	fn end_time (&self) -> Option<&str> { None }
-	fn generator (&self) -> Option<&str> { None }
-	fn icon (&self) -> Option<&str> { None }
-	fn image (&self) -> Option<&str> { None }
-	fn in_reply_to (&self) -> Option<&str> { None }
-	fn location (&self) -> Option<&str> { None }
-	fn preview (&self) -> Option<&str> { None }
-	fn published (&self) -> Option<chrono::DateTime<chrono::Utc>> { None }
-	fn replies (&self) -> Option<&str> { None }
-	fn start_time (&self) -> Option<&str> { None }
-	fn summary (&self) -> Option<&str> { None }
-	fn tag (&self) -> Option<&str> { None }
-	fn updated (&self) -> Option<&str> { None }
-	fn url (&self) -> Option<&str> { None }
-	fn to (&self) -> Option<&str> { None }
-	fn bto (&self) -> Option<&str> { None }
-	fn cc (&self) -> Option<&str> { None }
-	fn bcc (&self) -> Option<&str> { None }
-	fn media_type (&self) -> Option<&str> { None }
-	fn duration (&self) -> Option<&str> { None }
-}
-
-/// impl for empty object
-impl Object for () {}
-
-// TODO only Value::Object is a valid Object, but rn "asd" behaves like {} (both are valid...)
-/// impl for any json value
-impl Object for serde_json::Value {
-	fn id(&self) -> Option<&str> {
-		self.get("id")?.as_str()
-	}
-
-	fn full_type(&self) -> Option<super::BaseType> {
-		self.get("type")?.as_str()?.try_into().ok()
-	}
-
-	// ... TODO!
-}
diff --git a/src/activitystream/object/activity/accept.rs b/src/activitystream/object/activity/accept.rs
new file mode 100644
index 0000000..5a69328
--- /dev/null
+++ b/src/activitystream/object/activity/accept.rs
@@ -0,0 +1,12 @@
+use crate::strenum;
+
+strenum! {
+	pub enum AcceptType {
+		Accept,
+		TentativeAccept
+	}
+}
+
+pub trait Accept : super::Activity {
+	fn accept_type(&self) -> Option<AcceptType>;
+}
diff --git a/src/activitystream/object/activity/ignore.rs b/src/activitystream/object/activity/ignore.rs
new file mode 100644
index 0000000..fe6f343
--- /dev/null
+++ b/src/activitystream/object/activity/ignore.rs
@@ -0,0 +1,12 @@
+use crate::strenum;
+
+strenum! {
+	pub enum IgnoreType {
+		Ignore,
+		Block
+	}
+}
+
+pub trait Ignore : super::Activity {
+	fn ignore_type(&self) -> Option<IgnoreType>;
+}
diff --git a/src/activitystream/object/activity/intransitive.rs b/src/activitystream/object/activity/intransitive.rs
new file mode 100644
index 0000000..2d51301
--- /dev/null
+++ b/src/activitystream/object/activity/intransitive.rs
@@ -0,0 +1,14 @@
+use crate::strenum;
+
+strenum! {
+	pub enum IntransitiveActivityType {
+		IntransitiveActivity,
+		Arrive,
+		Question,
+		Travel
+	}
+}
+
+pub trait IntransitiveActivity : super::Activity {
+	fn intransitive_activity_type(&self) -> Option<IntransitiveActivityType>;
+}
diff --git a/src/activitystream/object/activity/mod.rs b/src/activitystream/object/activity/mod.rs
new file mode 100644
index 0000000..c5b43ec
--- /dev/null
+++ b/src/activitystream/object/activity/mod.rs
@@ -0,0 +1,72 @@
+pub mod accept;
+pub use accept::{Accept, AcceptType};
+
+pub mod ignore;
+pub use ignore::{Ignore, IgnoreType};
+
+pub mod intransitive;
+pub use intransitive::{IntransitiveActivity, IntransitiveActivityType};
+
+pub mod offer;
+pub use offer::{Offer, OfferType};
+
+pub mod reject;
+pub use reject::{Reject, RejectType};
+
+use crate::activitystream::node::NodeExtractor;
+use crate::activitystream::Node;
+use crate::strenum;
+
+strenum! {
+	pub enum ActivityType {
+		Activity,
+		Add,
+		Announce,
+		Create,
+		Delete,
+		Dislike,
+		Flag,
+		Follow,
+		Join,
+		Leave,
+		Like,
+		Listen,
+		Move,
+		Read,
+		Remove,
+		Undo,
+		Update,
+		View
+
+		IntransitiveActivity(IntransitiveActivityType),
+		Accept(AcceptType),
+		Ignore(IgnoreType),
+		Offer(OfferType),
+		Reject(RejectType)
+	}
+}
+
+pub trait Activity : super::Object {
+	fn activity_type(&self) -> Option<ActivityType> { None }
+	fn actor(&self) -> Node<impl super::Actor> { Node::Empty::<serde_json::Value> }
+	fn object(&self) -> Node<impl super::Object> { Node::Empty::<serde_json::Value> }
+	fn target(&self) -> Option<&str> { None }
+	fn result(&self) -> Node<impl super::Object> { Node::Empty::<serde_json::Value> }
+	fn origin(&self) -> Node<impl super::Object> { Node::Empty::<serde_json::Value> }
+	fn instrument(&self) -> Node<impl super::Object> { Node::Empty::<serde_json::Value> }
+}
+
+impl Activity for serde_json::Value {
+	fn activity_type(&self) -> Option<ActivityType> {
+		let serde_json::Value::String(t) = self.get("type")? else { return None };
+		ActivityType::try_from(t.as_str()).ok()
+	}
+
+	fn object(&self) -> Node<impl super::Object> {
+		self.node_vec("object")
+	}
+
+	fn actor(&self) -> Node<impl super::Actor> {
+		self.node_vec("actor")
+	}
+}
diff --git a/src/activitystream/object/activity/offer.rs b/src/activitystream/object/activity/offer.rs
new file mode 100644
index 0000000..5422242
--- /dev/null
+++ b/src/activitystream/object/activity/offer.rs
@@ -0,0 +1,12 @@
+use crate::strenum;
+
+strenum! {
+	pub enum OfferType {
+		Offer,
+		Invite
+	}
+}
+
+pub trait Offer : super::Activity {
+	fn offer_type(&self) -> Option<OfferType>;
+}
diff --git a/src/activitystream/object/activity/reject.rs b/src/activitystream/object/activity/reject.rs
new file mode 100644
index 0000000..7e5dd66
--- /dev/null
+++ b/src/activitystream/object/activity/reject.rs
@@ -0,0 +1,12 @@
+use crate::strenum;
+
+strenum! {
+	pub enum RejectType {
+		Reject,
+		TentativeReject
+	}
+}
+
+pub trait Reject : super::Activity {
+	fn reject_type(&self) -> Option<RejectType>;
+}
diff --git a/src/activitystream/object/actor.rs b/src/activitystream/object/actor.rs
new file mode 100644
index 0000000..b39dede
--- /dev/null
+++ b/src/activitystream/object/actor.rs
@@ -0,0 +1,28 @@
+use crate::strenum;
+
+strenum! {
+	pub enum ActorType {
+		Application,
+		Group,
+		Organization,
+		Person,
+		Object
+	}
+}
+
+pub trait Profile : super::Object {
+	// not a Node because it's always embedded and one
+	fn describes(&self) -> Option<impl super::Object> { None::<serde_json::Value> }
+}
+
+pub trait Actor : super::Object {
+	fn actor_type(&self) -> Option<ActorType> { None }
+}
+
+impl Actor for serde_json::Value {
+
+}
+
+impl Profile for serde_json::Value {
+
+}
diff --git a/src/activitystream/object/collection/mod.rs b/src/activitystream/object/collection/mod.rs
new file mode 100644
index 0000000..d653bc1
--- /dev/null
+++ b/src/activitystream/object/collection/mod.rs
@@ -0,0 +1,32 @@
+pub mod page;
+pub use page::CollectionPage;
+
+use crate::activitystream::Node;
+use crate::strenum;
+
+strenum! {
+	pub enum CollectionType {
+		Collection,
+		CollectionPage,
+		OrderedCollection,
+		OrderedCollectionPage
+	}
+}
+
+pub trait Collection : super::Object {
+	fn collection_type(&self) -> Option<CollectionType> { None }
+
+	fn total_items(&self) -> Option<u32> { None }
+	fn current(&self) -> Node<impl CollectionPage> { Node::Empty::<serde_json::Value> }
+	fn first(&self) -> Node<impl CollectionPage> { Node::Empty::<serde_json::Value> }
+	fn last(&self) -> Node<impl CollectionPage> { Node::Empty::<serde_json::Value> }
+	fn items(&self) -> Node<impl super::Object> { Node::Empty::<serde_json::Value> }
+}
+
+impl Collection for serde_json::Value {
+
+}
+
+impl CollectionPage for serde_json::Value {
+
+}
diff --git a/src/activitystream/object/collection/page.rs b/src/activitystream/object/collection/page.rs
new file mode 100644
index 0000000..a2b01c9
--- /dev/null
+++ b/src/activitystream/object/collection/page.rs
@@ -0,0 +1,7 @@
+use crate::activitystream::Node;
+
+pub trait CollectionPage : super::Collection {
+	fn part_of(&self) -> Node<impl super::Collection> { Node::Empty::<serde_json::Value> }
+	fn next(&self) -> Node<impl CollectionPage> { Node::Empty::<serde_json::Value> }
+	fn prev(&self) -> Node<impl CollectionPage> { Node::Empty::<serde_json::Value> }
+}
diff --git a/src/activitystream/object/document.rs b/src/activitystream/object/document.rs
new file mode 100644
index 0000000..346c46e
--- /dev/null
+++ b/src/activitystream/object/document.rs
@@ -0,0 +1,34 @@
+use crate::strenum;
+
+strenum! {
+	pub enum DocumentType {
+		Document,
+		Audio,
+		Image,
+		Page,
+		Video
+	}
+}
+
+pub trait Document : super::Object {
+	fn document_type(&self) -> Option<DocumentType> { None }
+}
+
+
+pub trait Place : super::Object {
+	fn accuracy(&self) -> Option<f32> { None }
+	fn altitude(&self) -> Option<f32> { None }
+	fn latitude(&self) -> Option<f32> { None }
+	fn longitude(&self) -> Option<f32> { None }
+	fn radius(&self) -> Option<f32> { None }
+	fn units(&self) -> Option<&str> { None }
+}
+
+pub trait Image : Document {}
+
+impl Document for serde_json::Value {
+
+}
+
+impl Image for serde_json::Value {}
+
diff --git a/src/activitystream/object/mod.rs b/src/activitystream/object/mod.rs
new file mode 100644
index 0000000..2b81f77
--- /dev/null
+++ b/src/activitystream/object/mod.rs
@@ -0,0 +1,129 @@
+pub mod actor;
+pub use actor::{Actor, Profile, ActorType};
+
+pub mod collection;
+pub use collection::{Collection, CollectionPage, CollectionType};
+
+pub mod document;
+pub use document::{Document, Image, Place, DocumentType};
+
+pub mod activity;
+pub use activity::{Activity, ActivityType};
+
+pub mod tombstone;
+pub use tombstone::Tombstone;
+
+pub mod relationship;
+pub use relationship::Relationship;
+
+use crate::strenum;
+
+use super::{node::NodeExtractor, Node};
+
+strenum! {
+	pub enum ObjectType {
+		Object,
+		Article,
+		Event,
+		Note,
+		Place,
+		Profile,
+		Relationship,
+		Tombstone
+	
+		Activity(ActivityType),
+		Actor(ActorType),
+		Collection(CollectionType),
+		Document(DocumentType)
+	}
+}
+
+pub trait Object : super::Base {
+	fn object_type(&self) -> Option<ObjectType> { None }
+	fn attachment(&self) -> Node<impl Object> { Node::Empty::<serde_json::Value> }
+	fn attributed_to(&self) -> Node<impl Actor> { Node::Empty::<serde_json::Value> }
+	fn audience(&self) -> Node<impl Actor> { Node::Empty::<serde_json::Value> }
+	fn content(&self) -> Option<&str> { None } // TODO handle language maps
+	fn context(&self) -> Node<impl Object> { Node::Empty::<serde_json::Value> } 
+	fn name(&self) -> Option<&str> { None }       // also in link // TODO handle language maps
+	fn end_time(&self) -> Option<chrono::DateTime<chrono::Utc>> { None }
+	fn generator(&self) -> Node<impl Actor> { Node::Empty::<serde_json::Value> }
+	fn icon(&self) -> Node<impl Image> { Node::Empty::<serde_json::Value> }
+	fn image(&self) -> Node<impl Image> { Node::Empty::<serde_json::Value> }
+	fn in_reply_to(&self) -> Node<impl Object> { Node::Empty::<serde_json::Value> }
+	fn location(&self) -> Node<impl Object> { Node::Empty::<serde_json::Value> }
+	fn preview(&self) -> Node<impl Object> { Node::Empty::<serde_json::Value> }    // also in link
+	fn published(&self) -> Option<chrono::DateTime<chrono::Utc>> { None }
+	fn replies(&self) -> Node<impl Collection> { Node::Empty::<serde_json::Value> }
+	fn start_time(&self) -> Option<chrono::DateTime<chrono::Utc>> { None }
+	fn summary(&self) -> Option<&str> { None }
+	fn tag(&self) -> Node<impl Object> { Node::Empty::<serde_json::Value> }
+	fn updated(&self) -> Option<chrono::DateTime<chrono::Utc>> { None }
+	fn url(&self) -> Option<Vec<impl super::Link>> { None::<Vec<serde_json::Value>> }
+	fn to(&self) -> Node<impl Object> { Node::Empty::<serde_json::Value> }
+	fn bto(&self) -> Node<impl Object> { Node::Empty::<serde_json::Value> }
+	fn cc(&self) -> Node<impl Object> { Node::Empty::<serde_json::Value> }
+	fn bcc(&self) -> Node<impl Object> { Node::Empty::<serde_json::Value> }
+	fn media_type(&self) -> Option<&str> { None } // also in link
+	fn duration(&self) -> Option<&str> { None } // TODO how to parse xsd:duration ?
+}
+
+impl Object for serde_json::Value {
+	fn object_type(&self) -> Option<ObjectType> {
+		match self.base_type() {
+			Some(super::BaseType::Object(o)) => Some(o),
+			_ => None,
+		}
+	}
+
+	fn attachment(&self) -> Node<impl Object> {
+		self.node_vec("attachment")
+	}
+
+	fn attributed_to(&self) -> Node<impl Actor> {
+		self.node_vec("attributedTo")
+	}
+
+	fn audience(&self) -> Node<impl Actor> {
+		self.node_vec("audience")
+	}
+
+	fn content(&self) -> Option<&str> {
+		self.get("content")?.as_str()
+	}
+
+	fn name(&self) -> Option<&str> {
+		self.get("name")?.as_str()
+	}
+
+	fn end_time(&self) -> Option<chrono::DateTime<chrono::Utc>> {
+		Some(
+			chrono::DateTime::parse_from_rfc3339(
+					self
+						.get("endTime")?
+						.as_str()?
+				)
+				.ok()?
+				.with_timezone(&chrono::Utc))
+	}
+
+	fn generator(&self) -> Node<impl Actor> {
+		self.node_vec("generator")
+	}
+
+	fn icon(&self) -> Node<impl Image> {
+		self.node_vec("icon")
+	}
+
+	fn image(&self) -> Node<impl Image> {
+		self.node_vec("image")
+	}
+
+	fn in_reply_to(&self) -> Node<impl Object> {
+		self.node_vec("inReplyTo")
+	}
+
+	fn location(&self) -> Node<impl Object> {
+		self.node_vec("location")
+	}
+}
diff --git a/src/activitystream/object/relationship.rs b/src/activitystream/object/relationship.rs
new file mode 100644
index 0000000..ccd9abe
--- /dev/null
+++ b/src/activitystream/object/relationship.rs
@@ -0,0 +1,11 @@
+use crate::activitystream::Node;
+
+pub trait Relationship : super::Object {
+	fn subject(&self) -> Node<impl super::Object> { Node::Empty::<serde_json::Value> }
+	fn relationship(&self) -> Option<&str> { None } // TODO what does this mean???
+	fn object(&self) -> Node<impl super::Object> { Node::Empty::<serde_json::Value> }
+}
+
+impl Relationship for serde_json::Value {
+	// ... TODO
+}
diff --git a/src/activitystream/object/tombstone.rs b/src/activitystream/object/tombstone.rs
new file mode 100644
index 0000000..39dc286
--- /dev/null
+++ b/src/activitystream/object/tombstone.rs
@@ -0,0 +1,8 @@
+pub trait Tombstone : super::Object {
+	fn former_type(&self) -> Option<super::super::BaseType> { None }
+	fn deleted(&self) -> Option<chrono::DateTime<chrono::Utc>> { None }
+}
+
+impl Tombstone for serde_json::Value {
+	// ... TODO
+}
diff --git a/src/activitystream/types.rs b/src/activitystream/types.rs
index fcee780..58e863c 100644
--- a/src/activitystream/types.rs
+++ b/src/activitystream/types.rs
@@ -14,8 +14,9 @@ impl From<TypeValueError> for sea_orm::TryGetError {
 	}
 }
 
+#[macro_export]
 macro_rules! strenum {
-	( $(pub enum $enum_name:ident { $($flat:ident),+ $($deep:ident($inner:ident)),*};)+ ) => {
+	( $(pub enum $enum_name:ident { $($flat:ident),+ $($deep:ident($inner:ident)),*})+ ) => {
 		$(
 			#[derive(PartialEq, Eq, Debug, Clone, Copy)]
 			pub enum $enum_name {
@@ -33,7 +34,7 @@ macro_rules! strenum {
 			}
 
 			impl TryFrom<&str> for $enum_name {
-				type Error = TypeValueError;
+				type Error = $crate::activitystream::types::TypeValueError;
 
 				fn try_from(value:&str) -> Result<Self, Self::Error> {
 					match value {
@@ -44,7 +45,7 @@ macro_rules! strenum {
 									return Ok(Self::$deep(x));
 								}
 							)*
-							Err(TypeValueError)
+							Err($crate::activitystream::types::TypeValueError)
 						},
 					}
 				}
@@ -87,142 +88,3 @@ macro_rules! strenum {
 		)*
 	};
 }
-
-strenum! {
-	pub enum BaseType {
-		Invalid
-
-		Object(ObjectType),
-		Link(LinkType)
-	};
-	
-	pub enum LinkType {
-		Base,
-		Mention
-	};
-	
-	pub enum ObjectType {
-		Object,
-		Relationship,
-		Tombstone
-
-		Activity(ActivityType),
-		Actor(ActorType),
-		Collection(CollectionType),
-		Status(StatusType)
-	};
-	
-	pub enum ActorType {
-		Application,
-		Group,
-		Organization,
-		Person,
-		Object
-	};
-	
-	pub enum StatusType {
-		Article,
-		Event,
-		Note,
-		Place,
-		Profile
-
-		Document(DocumentType)
-	};
-
-	pub enum CollectionType {
-		Collection,
-		CollectionPage,
-		OrderedCollection,
-		OrderedCollectionPage
-	};
-
-	pub enum AcceptType {
-		Accept,
-		TentativeAccept
-	};
-
-	pub enum DocumentType {
-		Document,
-		Audio,
-		Image,
-		Page,
-		Video
-	};
-	
-	pub enum ActivityType {
-		Activity,
-		Add,
-		Announce,
-		Create,
-		Delete,
-		Dislike,
-		Flag,
-		Follow,
-		Join,
-		Leave,
-		Like,
-		Listen,
-		Move,
-		Read,
-		Remove,
-		Undo,
-		Update,
-		View
-
-		IntransitiveActivity(IntransitiveActivityType),
-		Accept(AcceptType),
-		Ignore(IgnoreType),
-		Offer(OfferType),
-		Reject(RejectType)
-	};
-	
-	pub enum IntransitiveActivityType {
-		IntransitiveActivity,
-		Arrive,
-		Question,
-		Travel
-	};
-	
-	pub enum IgnoreType {
-		Ignore,
-		Block
-	};
-	
-	pub enum OfferType {
-		Offer,
-		Invite
-	};
-	
-	pub enum RejectType {
-		Reject,
-		TentativeReject
-	};
-}
-
-#[cfg(test)]
-mod test {
-	#[test]
-	fn assert_flat_types_serialize() {
-		let x = super::IgnoreType::Block;
-		assert_eq!("Block", <super::IgnoreType as AsRef<str>>::as_ref(&x));
-	}
-
-	#[test]
-	fn assert_deep_types_serialize() {
-		let x = super::StatusType::Document(super::DocumentType::Page);
-		assert_eq!("Page", <super::StatusType as AsRef<str>>::as_ref(&x));
-	}
-
-	#[test]
-	fn assert_flat_types_deserialize() {
-		let x = super::ActorType::try_from("Person").expect("could not deserialize");
-		assert_eq!(super::ActorType::Person, x);
-	}
-
-	#[test]
-	fn assert_deep_types_deserialize() {
-		let x = super::ActivityType::try_from("Invite").expect("could not deserialize");
-		assert_eq!(super::ActivityType::Offer(super::OfferType::Invite), x);
-	}
-}