diff --git a/src/lib.rs b/src/lib.rs
index d9ea91d..f74f579 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,5 +1,7 @@
 mod node_ref;
 mod links;
+mod metadata;
 
 pub use node_ref::*;
 pub use links::*;
+pub use metadata::*;
diff --git a/src/links.rs b/src/links.rs
index 12bfea1..14ef1ef 100644
--- a/src/links.rs
+++ b/src/links.rs
@@ -1,11 +1,7 @@
-pub trait LinkedStructLinksTypeProvider {
-    type Links: Sized;
-}
-
-pub trait LinkedStructLinksOffset: LinkedStructLinksTypeProvider {
+pub trait LinkedStructLinksOffset {
     type Node;
+    type Links;
 
     fn getLinks<R>(nodeRef: &Self::Node, consumer: impl FnOnce(&Self::Links) -> R) -> R;
-
     fn getLinksMut<R>(nodeRef: &mut Self::Node, consumer: impl FnOnce(&mut Self::Links) -> R) -> R;
 }
diff --git a/src/metadata.rs b/src/metadata.rs
new file mode 100644
index 0000000..1176710
--- /dev/null
+++ b/src/metadata.rs
@@ -0,0 +1,7 @@
+use crate::LinkedStructNodeRef;
+
+pub trait LinkedStructMetadata {
+    type Links<Node>: Sized;
+
+    type NodeRef<Node>: LinkedStructNodeRef;
+}