diff --git a/ast-generator/src/spec/struct_spec.rs b/ast-generator/src/spec/struct_spec.rs
index 56acd01..780e23a 100644
--- a/ast-generator/src/spec/struct_spec.rs
+++ b/ast-generator/src/spec/struct_spec.rs
@@ -48,15 +48,15 @@ impl SkipChild {
 pub struct VecChild {
     name: String,
     rule: String,
-    kind: String,
+    build: Box<VecChildBuild>
 }
 
 impl VecChild {
-    pub fn new(name: &str, rule: &str, kind: &str) -> Self {
+    pub fn new(name: &str, rule: &str, build: Box<VecChildBuild>) -> Self {
         Self {
             name: name.to_string(),
             rule: rule.to_string(),
-            kind: kind.to_string(),
+            build
         }
     }
 
@@ -69,10 +69,51 @@ impl VecChild {
     pub fn rule(&self) -> &str {
         &self.rule
     }
+    
+    pub fn build(&self) -> &VecChildBuild {
+        &self.build
+    }
+}
 
+pub enum VecChildBuild {
+    String(VecChildStringBuild),
+    Node(VecChildNodeBuild)
+}
+
+pub struct VecChildStringBuild {
+    with: String
+}
+
+impl VecChildStringBuild {
+    pub fn new(with: &str) -> Self {
+        Self { with: with.to_string() }
+    }
+    
+    pub fn with(&self) -> &str {
+        &self.with
+    }
+}
+
+pub struct VecChildNodeBuild {
+    kind: String,
+    with: String
+}
+
+impl VecChildNodeBuild {
+    pub fn new(kind: &str, with: &str) -> Self {
+        Self {
+            kind: kind.to_string(),
+            with: with.to_string()
+        }
+    }
+    
     pub fn kind(&self) -> &str {
         &self.kind
     }
+    
+    pub fn with(&self) -> &str {
+        &self.with
+    }
 }
 
 #[derive(Debug)]