diff --git a/model/delta/1.4.0.sql b/model/delta/1.4.0.sql
new file mode 100644
index 0000000..7a52b92
--- /dev/null
+++ b/model/delta/1.4.0.sql
@@ -0,0 +1,18 @@
+create table luminotes_group ( id text not null, revision timestamp with time zone not null, name text );
+create index luminotes_group_pkey on luminotes_group using btree ( id, revision );
+create view
+  luminotes_group_current as
+  select
+    luminotes_group.id, luminotes_group.revision, luminotes_group.name
+  from
+    luminotes_group
+  where
+    ( luminotes_group.revision in (
+      select
+        max( sub_group.revision ) as max
+      from
+        luminotes_group sub_group
+      where
+        sub_group.id = luminotes_group.id
+    ) );
+create table user_group ( user_id text not null, group_id text not null, admin boolean default false );
diff --git a/model/schema.sql b/model/schema.sql
index a0fa985..f36d40e 100644
--- a/model/schema.sql
+++ b/model/schema.sql
@@ -59,6 +59,29 @@ CREATE TABLE invite (
 
 ALTER TABLE public.invite OWNER TO luminotes;
 
+--
+-- Name: luminotes_group; Type: TABLE; Schema: public; Owner: luminotes; Tablespace: 
+--
+
+CREATE TABLE luminotes_group (
+    id text NOT NULL,
+    revision timestamp with time zone NOT NULL,
+    name text
+);
+
+
+ALTER TABLE public.luminotes_group OWNER TO luminotes;
+
+--
+-- Name: luminotes_group_current; Type: VIEW; Schema: public; Owner: luminotes
+--
+
+CREATE VIEW luminotes_group_current AS
+    SELECT luminotes_group.id, luminotes_group.revision, luminotes_group.name FROM luminotes_group WHERE (luminotes_group.revision IN (SELECT max(sub_group.revision) AS max FROM luminotes_group sub_group WHERE (sub_group.id = luminotes_group.id)));
+
+
+ALTER TABLE public.luminotes_group_current OWNER TO luminotes;
+
 --
 -- Name: luminotes_user; Type: TABLE; Schema: public; Owner: luminotes; Tablespace: 
 --
@@ -157,6 +180,19 @@ CREATE TABLE password_reset (
 
 ALTER TABLE public.password_reset OWNER TO luminotes;
 
+--
+-- Name: user_group; Type: TABLE; Schema: public; Owner: luminotes; Tablespace: 
+--
+
+CREATE TABLE user_group (
+    user_id text NOT NULL,
+    group_id text NOT NULL,
+    "admin" boolean DEFAULT false
+);
+
+
+ALTER TABLE public.user_group OWNER TO luminotes;
+
 --
 -- Name: user_notebook; Type: TABLE; Schema: public; Owner: luminotes; Tablespace: 
 --
@@ -242,6 +278,13 @@ CREATE INDEX file_note_id_index ON file USING btree (note_id);
 CREATE INDEX file_notebook_id_index ON file USING btree (notebook_id);
 
 
+--
+-- Name: luminotes_group_pkey; Type: INDEX; Schema: public; Owner: luminotes; Tablespace: 
+--
+
+CREATE INDEX luminotes_group_pkey ON luminotes_group USING btree (id, revision);
+
+
 --
 -- Name: luminotes_user_email_address_index; Type: INDEX; Schema: public; Owner: luminotes; Tablespace: 
 --