diff --git a/rex/admin.py b/rex/admin.py
index ef8252ecc2efe313e4ca1a6c396f96255de7c4b7..eafb14abf6a31ff5ddd48392754191ad80fa7009 100644
--- a/rex/admin.py
+++ b/rex/admin.py
@@ -4,9 +4,11 @@ from reversion_compare.admin import CompareVersionAdmin
 from rex.models.university import University, MainCampus
 from rex.models.location import Country, City
 
+from rex.models.module import BasicModule
 
 admin.site.register(Country)
 admin.site.register(City)
+admin.site.register(BasicModule)
 
 admin.site.register(University, CompareVersionAdmin)
 admin.site.register(MainCampus, CompareVersionAdmin)
diff --git a/rex/migrations/0001_initial.py b/rex/migrations/0001_initial.py
index 687d4a9c5f2406a65feba474e7ed59abf59132e7..ce98ac5dd887846aa0e78bdec8f35508000545f7 100644
--- a/rex/migrations/0001_initial.py
+++ b/rex/migrations/0001_initial.py
@@ -1,8 +1,9 @@
-# Generated by Django 2.0.3 on 2018-08-18 08:44
+# Generated by Django 2.0.3 on 2018-08-19 11:49
 
 import django.core.validators
 from django.db import migrations, models
 import django.db.models.deletion
+import rex.models.tools.usefullLinksField
 import rex.utils.friendly_path
 
 
@@ -14,6 +15,14 @@ class Migration(migrations.Migration):
     ]
 
     operations = [
+        migrations.CreateModel(
+            name='BasicModule',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('comment', models.TextField()),
+                ('usefull_links', rex.models.tools.usefullLinksField.UsefullLinksField(validators=[rex.models.tools.usefullLinksField.validate_usefull_links])),
+            ],
+        ),
         migrations.CreateModel(
             name='City',
             fields=[
diff --git a/rex/models/module/__init__.py b/rex/models/module/__init__.py
index 3b0b8597cf752570f4cbe9837ebc781a6f4d6f66..caa63724ed9cef0a626fbc65aa5d84bd720e4275 100644
--- a/rex/models/module/__init__.py
+++ b/rex/models/module/__init__.py
@@ -1 +1,2 @@
 from .module import Module  # noqa: F401
+from .basicModule import BasicModule  # noqa: F401
diff --git a/rex/models/module/basicModule.py b/rex/models/module/basicModule.py
new file mode 100644
index 0000000000000000000000000000000000000000..241677660706b0935ff9e17a9a159a26549146b2
--- /dev/null
+++ b/rex/models/module/basicModule.py
@@ -0,0 +1,11 @@
+from django.db import models
+from rex.models.tools import UsefullLinksField
+
+
+class BasicModule(models.Model):
+
+    comment = models.TextField()
+    usefull_links = UsefullLinksField()
+
+    # class Meta:
+    #     abstract = True
diff --git a/rex/models/tools/__init__.py b/rex/models/tools/__init__.py
index da1a08ceaa94eabae324c5a9ce90faa4dfbfa39a..a666aa722a1d016d3d00efa2ce67de04b7f31aea 100644
--- a/rex/models/tools/__init__.py
+++ b/rex/models/tools/__init__.py
@@ -1 +1,3 @@
 from .DictModeViewSet import DictModeViewSet  # noqa: F401
+from .usefullLinksField import UsefullLinksField  # noqa: F401
+from .validateWithRestFramework import validate_with_rest_framework  # noqa: F401
diff --git a/rex/models/tools/usefullLinksField.py b/rex/models/tools/usefullLinksField.py
new file mode 100644
index 0000000000000000000000000000000000000000..f12cc805c7a27fc183c1e8d4eb4a89681cca828d
--- /dev/null
+++ b/rex/models/tools/usefullLinksField.py
@@ -0,0 +1,35 @@
+from django.contrib.postgres.fields import JSONField
+from django.core.exceptions import ValidationError
+
+from rest_framework import serializers
+from rex.models.tools.validateWithRestFramework import validate_with_rest_framework
+
+
+class UrlAndDescriptionSerializer(serializers.Serializer):
+    """
+        Simple serialize used to validate each usefull links objs
+    """
+    url = serializers.URLField(required=True)
+    description = serializers.CharField(
+        required=False, allow_null=True, allow_blank=True)
+
+
+def validate_usefull_links(value):
+    """
+        Function validate the data that should be stored
+        in a usefull_links field
+    """
+
+    if type(value) is not list:
+        raise ValidationError("Usefull links must be a JSON array !")
+
+    for obj in value:
+        validate_with_rest_framework(UrlAndDescriptionSerializer, obj)
+
+
+class UsefullLinksField(JSONField):
+    description = "A field to store a URL and a description as single JSON data"
+
+    def __init__(self, *args, **kwargs):
+        kwargs['validators'] = [validate_usefull_links]
+        super(UsefullLinksField, self).__init__(*args, **kwargs)
diff --git a/rex/models/tools/validateWithRestFramework.py b/rex/models/tools/validateWithRestFramework.py
new file mode 100644
index 0000000000000000000000000000000000000000..c7bb8f057fecc8627dd9fe6381be8321ab55393d
--- /dev/null
+++ b/rex/models/tools/validateWithRestFramework.py
@@ -0,0 +1,20 @@
+from django.core.exceptions import ValidationError
+
+
+def validate_with_rest_framework(serializer, value):
+    """
+        Function to validate some data (comming from JSON)
+        against a serializer.
+        TODO add test for this...
+    """
+
+    valid_ser = serializer(data=value)
+    if not valid_ser.is_valid():
+        raise ValidationError(str(valid_ser.errors))
+
+    # Also checks that no extra fields were added
+    if type(value) is not list:
+        allowed_keys = list(valid_ser.get_fields())
+        for key in value.keys():
+            if key not in allowed_keys:
+                raise ValidationError("Expected JSON schema not respected")