diff --git a/edn/README.md b/edn/README.md
new file mode 100644
index 00000000..5c05a67d
--- /dev/null
+++ b/edn/README.md
@@ -0,0 +1,4 @@
+# `tek_edn`
+
+parser and bindings for tek's configuration language,
+which is based on edn.
diff --git a/edn/examples/edn01.rs b/edn/examples/edn01.rs
new file mode 100644
index 00000000..26fe7431
--- /dev/null
+++ b/edn/examples/edn01.rs
@@ -0,0 +1,8 @@
+use tek_edn::*;
+
+const SOURCE: &'static str = include_str!("edn01.edn");
+
+fn main () {
+    Tui::run(Arc::new(RwLock::new(Demo::new())))?;
+    Ok(())
+}
diff --git a/edn/examples/edn02.rs b/edn/examples/edn02.rs
new file mode 100644
index 00000000..d5e23ee8
--- /dev/null
+++ b/edn/examples/edn02.rs
@@ -0,0 +1,8 @@
+use tek_edn::*;
+
+const SOURCE: &'static str = include_str!("edn02.edn");
+
+fn main () {
+    Tui::run(Arc::new(RwLock::new(Demo::new())))?;
+    Ok(())
+}
diff --git a/edn/src/edn_layout.rs b/edn/src/edn_layout.rs
deleted file mode 100644
index 6c893626..00000000
--- a/edn/src/edn_layout.rs
+++ /dev/null
@@ -1,20 +0,0 @@
-use crate::*;
-use std::marker::PhantomData;
-use ::tek_layout::{*, tek_engine::{Usually, Content, Render, Engine, Thunk}};
-use EdnItem::*;
-
-pub type EdnRender<'a, Engine> =
-    dyn Render<Engine> + Send + Sync + 'a;
-
-pub type EdnCallback<'a, Engine, State> =
-    dyn Fn(&'a State)->Box<EdnRender<'a, Engine>> + Send + Sync + 'a;
-
-pub type EdnRenderCallback<'a, Engine, State> =
-    Box<EdnCallback<'a, Engine, State>>;
-
-pub trait EdnLayout<'a, E: Engine + 'a> where Self: 'a {
-    fn get_bool    (&self,    _sym: &str) -> bool { false }
-    fn get_unit    (&self,    _sym: &str) -> E::Unit { 0.into() }
-    fn get_usize   (&self,    _sym: &str) -> usize { 0 }
-    fn get_content (&'a self, _sym: &str) -> Box<EdnRender<'a, E>> { Box::new(()) }
-}
diff --git a/edn/src/edn_view.rs b/edn/src/edn_view.rs
index dbac002b..aad174e4 100644
--- a/edn/src/edn_view.rs
+++ b/edn/src/edn_view.rs
@@ -1,22 +1,40 @@
 use crate::*;
 use std::marker::PhantomData;
+use ::tek_layout::{*, tek_engine::{Usually, Content, Render, Engine, Thunk}};
+use EdnItem::*;
+
+pub type EdnRender<'a, Engine> =
+    dyn Render<Engine> + Send + Sync + 'a;
+
+pub type EdnCallback<'a, Engine, State> =
+    dyn Fn(&'a State)->Box<EdnRender<'a, Engine>> + Send + Sync + 'a;
+
+pub type EdnRenderCallback<'a, Engine, State> =
+    Box<EdnCallback<'a, Engine, State>>;
+
+pub trait EdnLayout<E: Engine> {
+    fn get_bool    (&self,    _sym: &str) -> bool { false }
+    fn get_unit    (&self,    _sym: &str) -> E::Unit { 0.into() }
+    fn get_usize   (&self,    _sym: &str) -> usize { 0 }
+    fn get_content <'a> (&'a self, _sym: &str) -> Box<EdnRender<'a, E>> { Box::new(()) }
+}
 
 /// Renders from EDN source and context.
-pub struct EdnView<'a, E: Engine + 'a, T: EdnLayout<'a, E> + 'a> {
-    _engine: PhantomData<&'a E>,
+pub struct EdnView<E: Engine, T: EdnLayout<E>> {
+    _engine: PhantomData<E>,
     context: T,
     layout:  EdnItem<String>
     //render: Box<dyn Fn(&'a T)->Box<dyn Render<E> + Send + Sync + 'a> + Send + Sync + 'a>
 }
 
-impl<'a, E: Engine + 'a, T: EdnLayout<'a, E> + 'a> EdnView<'a, E, T> {
-    pub fn new (context: T, source: &'a str) -> Usually<Self> {
+impl<E: Engine, T: EdnLayout<E>> EdnView<E, T> {
+    pub fn new (context: T, source: &str) -> Usually<Self> {
         let layout = EdnItem::read_one(&source)?.0;
         Ok(Self { _engine: Default::default(), context, layout, })
     }
 }
 
-impl<'a, E: Engine + 'a, T: EdnLayout<'a, E> + Send + Sync + 'a> Content<E> for EdnView<'a, E, T> {
+impl<E: Engine, T: EdnLayout<E> + Send + Sync> Content<E> for EdnView<E, T> {
     fn content (&self) -> impl Render<E> {
         use EdnItem::*;
         match &self.layout {
diff --git a/edn/src/lib.rs b/edn/src/lib.rs
index 70f8ced2..e0e93502 100644
--- a/edn/src/lib.rs
+++ b/edn/src/lib.rs
@@ -11,7 +11,6 @@ pub(crate) use ::tek_layout::{
 
 mod edn_error;   pub use self::edn_error::*;
 mod edn_item;    pub use self::edn_item::*;
-mod edn_layout;  pub use self::edn_layout::*;
 mod edn_token;   pub use self::edn_token::*;
 mod edn_view;    pub use self::edn_view::*;
 
diff --git a/engine/src/output.rs b/engine/src/output.rs
index 7fa9a823..e37d3a47 100644
--- a/engine/src/output.rs
+++ b/engine/src/output.rs
@@ -27,6 +27,9 @@ impl<E: Engine, C: Content<E>> Render<E> for C {
     fn layout (&self, area: E::Area) -> E::Area { Content::layout(self, area) }
     fn render (&self, output: &mut E::Output) { Content::render(self, output) }
 }
+impl<'a, E: Engine> Content<E> for Box<dyn Render<E> + 'a> {
+    fn content (&self) -> impl Render<E> { self }
+}
 impl<'a, E: Engine> Content<E> for Box<dyn Render<E> + Send + Sync + 'a> {
     fn content (&self) -> impl Render<E> { self }
 }
@@ -74,6 +77,7 @@ impl<E: Engine, T: Content<E>> Content<E> for Option<T> {
     }
 }
 
+
 #[macro_export] macro_rules! render {
     (($self:ident:$Struct:ty) => $content:expr) => {
         impl <E: Engine> Content<E> for $Struct {
diff --git a/engine/src/tui.rs b/engine/src/tui.rs
index 02b5948f..68116829 100644
--- a/engine/src/tui.rs
+++ b/engine/src/tui.rs
@@ -92,7 +92,7 @@ impl Tui {
     }
 }
 
-pub trait TuiRun<R: Content<Tui> + Handle<Tui> + Sized + 'static> {
+pub trait TuiRun<R: Render<Tui> + Handle<Tui> + Sized + 'static> {
     /// Run an app in the main loop.
     fn run (&self, state: &Arc<RwLock<R>>) -> Usually<()>;
     /// Spawn the input thread.
@@ -101,7 +101,7 @@ pub trait TuiRun<R: Content<Tui> + Handle<Tui> + Sized + 'static> {
     fn run_output (&self, state: &Arc<RwLock<R>>, sleep: Duration) -> JoinHandle<()>;
 }
 
-impl<T: Content<Tui> + Handle<Tui> + Sized + 'static> TuiRun<T> for Arc<RwLock<Tui>> {
+impl<T: Render<Tui> + Handle<Tui> + Sized + 'static> TuiRun<T> for Arc<RwLock<Tui>> {
     fn run (&self, state: &Arc<RwLock<T>>) -> Usually<()> {
         let _input_thread = self.run_input(state, Duration::from_millis(100));
         self.write().unwrap().setup()?;
diff --git a/engine/src/tui/tui_output.rs b/engine/src/tui/tui_output.rs
index 43382fb7..f0a80aa5 100644
--- a/engine/src/tui/tui_output.rs
+++ b/engine/src/tui/tui_output.rs
@@ -65,7 +65,7 @@ impl TuiOut {
     }
 }
 
-impl Content<Tui> for &str {
+impl Render<Tui> for &str {
     fn layout (&self, to: [u16;4]) -> [u16;4] {
         to.center_xy([self.chars().count() as u16, 1])
     }
@@ -74,7 +74,7 @@ impl Content<Tui> for &str {
     }
 }
 
-impl Content<Tui> for String {
+impl Render<Tui> for String {
     fn layout (&self, to: [u16;4]) -> [u16;4] {
         to.center_xy([self.chars().count() as u16, 1])
     }