diff --git a/extension/toar_controlled_vocabulary-0.1/toar_controlled_vocabulary--0.1.sql b/extension/toar_controlled_vocabulary-0.1/toar_controlled_vocabulary--0.1.sql
index 7c955595996d35a2828c2b3d069b0a9b259128ee..22515c65163f3a095a024bd668f018d861692cd0 100644
--- a/extension/toar_controlled_vocabulary-0.1/toar_controlled_vocabulary--0.1.sql
+++ b/extension/toar_controlled_vocabulary-0.1/toar_controlled_vocabulary--0.1.sql
@@ -47,6 +47,26 @@ INSERT INTO RS_vocabulary (enum_val, enum_str, enum_display_str) VALUES
     (1, 'inactive', 'inactive'),
     (2, 'unknown', 'unknown');
 
+
+-- Annotation
+-- ==========
+
+-- Kind of Annotation
+
+CREATE TABLE IF NOT EXISTS AK_vocabulary (
+    enum_val         INT NOT NULL,
+    enum_str         character varying(128) NOT NULL, 
+    enum_display_str character varying(128) NOT NULL, 
+    PRIMARY KEY(enum_val, enum_str),
+    CONSTRAINT ak_enum_val_unique UNIQUE (enum_val)
+);      
+
+INSERT INTO AK_vocabulary (enum_val, enum_str, enum_display_str) VALUES
+    (0, 'User', 'user comment'),
+    (1, 'Provider', 'provider comment');
+
+
+
 -- Contacts
 -- ========
 
diff --git a/toardb/generic/models.py b/toardb/generic/models.py
index ad6af6b31157305fc1981556dba295a99663ef66..6222dffbdee9456015cb2430f6bbb07103bea4c7 100644
--- a/toardb/generic/models.py
+++ b/toardb/generic/models.py
@@ -5,6 +5,8 @@ from toardb.base import Base
 
 # controlled vocabulary
 
+## Roles
+
 # Role Status
 RS_enum_table = Table("rs_vocabulary",
                 Base.metadata,
@@ -58,3 +60,20 @@ CL_enum = (
     Enumdict(6, 'Flagging', 'data value flagging')
     )
 
+## Annotations
+
+# Kind of Annotations
+AK_enum_table = Table("ak_vocabulary",
+                Base.metadata,
+                Column("enum_val", Integer, primary_key=True),
+                Column("enum_str", String),
+                Column("enum_display_str", String)
+          )
+# The following code is just a workaround (see stationmeta/models.py):
+from collections import namedtuple
+Enumdict=namedtuple("Dict",["value","string","display_str"])
+AK_enum = (
+    Enumdict(0, 'User', 'user comment'),
+    Enumdict(1, 'Provider', 'provider comment')
+    )
+ 
diff --git a/toardb/stationmeta/models_annotation.py b/toardb/stationmeta/models_annotation.py
index 2a7fb421586c04d0e2a3b6e40f0ff4f21666bba4..45bb9f355b13fb12b14509d9ad37aa4c793e8205 100644
--- a/toardb/stationmeta/models_annotation.py
+++ b/toardb/stationmeta/models_annotation.py
@@ -4,7 +4,7 @@ class StationmetaAnnotation (Base)
 ==================================
 """
 from sqlalchemy import Column, DateTime, Float, ForeignKey, Integer, String, \
-                       Text, Boolean, CheckConstraint, Table, Sequence
+                       Text, Boolean, CheckConstraint, Table, Sequence, text
 from sqlalchemy.orm import relationship
 from toardb.auth_user.models import AuthUser
 from toardb.base import Base
@@ -26,7 +26,7 @@ class StationmetaAnnotation(Base):
     +================+==========================+===========+==========+========================================================+
     | id             | integer                  |           | not null | nextval('stationmeta_annotations_id_seq'::regclass)    |
     +----------------+--------------------------+-----------+----------+--------------------------------------------------------+
-    | kind           | integer                  |           | not null |                                                        |
+    | kind           | integer                  |           | not null | 0                                                      |
     +----------------+--------------------------+-----------+----------+--------------------------------------------------------+
     | text           | text                     |           | not null |                                                        |
     +----------------+--------------------------+-----------+----------+--------------------------------------------------------+
@@ -43,6 +43,7 @@ class StationmetaAnnotation(Base):
      "stationmeta_annotations_kind_check" CHECK (kind >= 0)
     Foreign-key constraints:
      "stationmeta_annotations_contributor_id_a5009820_fk_auth_user_id" FOREIGN KEY (contributor_id) REFERENCES auth_user(id) DEFERRABLE INITIALLY DEFERRED
+     "stationmeta_annotations_kind_fk_ak_vocabulary_enum_val" FOREIGN KEY (kind) REFERENCES ak_vocabulary(enum_val)
     """
     __tablename__ = 'stationmeta_annotations'
     __table_args__ = (
@@ -50,7 +51,7 @@ class StationmetaAnnotation(Base):
     )
 
     id = Column(Integer, STATIONMETA_ANNOTATIONS_ID_SEQ, primary_key=True, server_default=STATIONMETA_ANNOTATIONS_ID_SEQ.next_value())
-    kind = Column(Integer, nullable=False)
+    kind = Column(ForeignKey('ak_vocabulary.enum_val'), nullable=False, server_default=text("0'::integer"))
     text = Column(Text, nullable=False)
     date_added = Column(DateTime(True), nullable=False)
     approved = Column(Boolean, nullable=False)