diff --git a/src/wanijo/attribute/domain.clj b/src/wanijo/attribute/domain.clj
index 10cd386..c002321 100644
--- a/src/wanijo/attribute/domain.clj
+++ b/src/wanijo/attribute/domain.clj
@@ -1,23 +1,17 @@
 (ns wanijo.attribute.domain
   (:require [clojure.spec.alpha :as spec]
+            [wanijo.specs :as specs]
             [wanijo.framework.neo4j :as neo4j]))
 
-(spec/def ::name
-  (spec/and string? not-empty))
-
 (def types
   #{"string" "markdown"})
-
-(spec/def ::type
-  (spec/and string? types))
-
-(spec/def ::created-at
-  (spec/and string? ::neo4j/date-str))
-
+(spec/def ::type types)
+(spec/def ::name
+  (spec/and ::specs/name (complement empty?)))
 (spec/def ::attribute
   (spec/keys ::req-un [::name
                        ::type
-                       ::created-at]))
+                       ::specs/created-at]))
 
 (neo4j/defquery
   findy-by-schema
@@ -25,7 +19,6 @@
    WHERE s.uuid = {uuid}
    RETURN a
    ORDER BY a.name")
-
 (defn find-by-schema! [schema-uuid]
   (map :a
        (neo4j/exec-query!
@@ -43,7 +36,6 @@
       SET a.uuid = {attribute_uuid}
       SET a.required = {required}
       SET a.created_at = {created_at}")
-
 (defn create-new! [attr schema-uuid user-uuid]
   (neo4j/exec-query!
    create-new
@@ -59,7 +51,6 @@
      SET a.type = {type}
      SET a.name = {name}
      SET a.required = {required}")
-
 (defn edit! [attr]
   (neo4j/exec-query!
    edit
@@ -69,7 +60,6 @@
   "MATCH (a:attribute)-[c]-()
    WHERE a.uuid = {uuid}
    DELETE c, a")
-
 (defn delete-by-uuid! [uuid]
   (neo4j/exec-query!
    delete-by-uuid
@@ -80,7 +70,6 @@
    WHERE a.required = 1
    RETURN a
    ORDER BY a.name")
-
 (defn required! [schema-uuid]
   (map :a
        (neo4j/exec-query! required
@@ -89,7 +78,6 @@
 (neo4j/defquery schema-of
   "MATCH (a:attribute {uuid:{uuid}})-[:of]->(s:schema)
    RETURN s")
-
 (defn schema-of! [uuid]
   (->> (neo4j/exec-query! schema-of
                           {:uuid uuid})
@@ -102,7 +90,6 @@
          (a:attribute)-[:of]->(s)
    RETURN a
    ORDER BY a.name")
-
 (defn find-by-instance! [instance-uuid]
   (map :a
        (neo4j/exec-query! find-by-instance