diff --git a/src/value.rs b/src/value.rs
index a8d2d62..e280472 100644
--- a/src/value.rs
+++ b/src/value.rs
@@ -12,11 +12,10 @@ pub enum Value<'a> {
     List(Box<List<'a>>),
     Vector(Vec<Self>),
     Map(BTreeMap<Self, Self>),
-    Symbol(Cow<'a, str>),
+    Symbol(Symbol<'a>),
     Keyword(Cow<'a, str>),
     Function {
-        args: Vec<Value<'a>>,
-        body: Box<Value<'a>>,
+        // TODO: Fields,
     },
     Bool(bool),
     Number(OrderedFloat<f64>),
@@ -24,6 +23,27 @@ pub enum Value<'a> {
     Nil,
 }
 
+#[derive(Debug, Clone, Hash, PartialEq, Eq, PartialOrd, Ord)]
+pub enum Symbol<'a> {
+    Interned(u64),
+    String(Cow<'a, str>),
+}
+
+impl<'a> From<&'a str> for Symbol<'a> {
+    fn from(s: &'a str) -> Self {
+        Self::String(Cow::Borrowed(s))
+    }
+}
+
+impl<'a> Display for Symbol<'a> {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Symbol::Interned(n) => write!(f, "#{n}"),
+            Symbol::String(s) => write!(f, "{s}"),
+        }
+    }
+}
+
 impl<'a> Display for Value<'a> {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         match self {