diff --git a/db.sqlite3 b/db.sqlite3
index 08493af..c9c273c 100644
Binary files a/db.sqlite3 and b/db.sqlite3 differ
diff --git a/evolus/admin.py b/evolus/admin.py
index 785c0ba..718b9bc 100644
--- a/evolus/admin.py
+++ b/evolus/admin.py
@@ -1,8 +1,13 @@
 from django.contrib import admin
 
-from .models import Audience, Document, Structure
+from .models import Audience, Document, Site, Structure
+
+
+class DocumentAdmin(admin.ModelAdmin):
+    list_filter = ('audiences', 'sites', 'structures')
 
 
 admin.site.register(Audience)
+admin.site.register(Site)
 admin.site.register(Structure)
-admin.site.register(Document)
\ No newline at end of file
+admin.site.register(Document, DocumentAdmin)
\ No newline at end of file
diff --git a/evolus/filters.py b/evolus/filters.py
index 45065df..454c973 100644
--- a/evolus/filters.py
+++ b/evolus/filters.py
@@ -6,4 +6,4 @@ from evolus.models import Document
 class DocumentFilter(django_filters.FilterSet):
     class Meta:
         model = Document
-        fields = ('audience', 'structure', 'standards')
+        fields = ('audiences', 'sites', 'structures', 'standards')
diff --git a/evolus/migrations/0005_auto_20170918_1251.py b/evolus/migrations/0005_auto_20170918_1251.py
new file mode 100644
index 0000000..7cbad96
--- /dev/null
+++ b/evolus/migrations/0005_auto_20170918_1251.py
@@ -0,0 +1,27 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.5 on 2017-09-18 10:51
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('evolus', '0004_auto_20170915_0954'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Site',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(max_length=50)),
+            ],
+        ),
+        migrations.AddField(
+            model_name='document',
+            name='sites',
+            field=models.ManyToManyField(to='evolus.Site'),
+        ),
+    ]
diff --git a/evolus/migrations/0006_auto_20170918_1254.py b/evolus/migrations/0006_auto_20170918_1254.py
new file mode 100644
index 0000000..fc8d336
--- /dev/null
+++ b/evolus/migrations/0006_auto_20170918_1254.py
@@ -0,0 +1,25 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.5 on 2017-09-18 10:54
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('evolus', '0005_auto_20170918_1251'),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name='site',
+            options={'ordering': ['name']},
+        ),
+        migrations.AddField(
+            model_name='document',
+            name='title',
+            field=models.CharField(default='', max_length=255),
+            preserve_default=False,
+        ),
+    ]
diff --git a/evolus/migrations/0007_document_overview.py b/evolus/migrations/0007_document_overview.py
new file mode 100644
index 0000000..eed4bbb
--- /dev/null
+++ b/evolus/migrations/0007_document_overview.py
@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.5 on 2017-09-18 10:56
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('evolus', '0006_auto_20170918_1254'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='document',
+            name='overview',
+            field=models.TextField(blank=True, null=True),
+        ),
+    ]
diff --git a/evolus/migrations/0008_auto_20170918_1305.py b/evolus/migrations/0008_auto_20170918_1305.py
new file mode 100644
index 0000000..81d3fcc
--- /dev/null
+++ b/evolus/migrations/0008_auto_20170918_1305.py
@@ -0,0 +1,25 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.5 on 2017-09-18 11:05
+from __future__ import unicode_literals
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('evolus', '0007_document_overview'),
+    ]
+
+    operations = [
+        migrations.RenameField(
+            model_name='document',
+            old_name='audience',
+            new_name='audiences',
+        ),
+        migrations.RenameField(
+            model_name='document',
+            old_name='structure',
+            new_name='structures',
+        ),
+    ]
diff --git a/evolus/models.py b/evolus/models.py
index ae9ac60..aa9d639 100644
--- a/evolus/models.py
+++ b/evolus/models.py
@@ -15,6 +15,17 @@ class Audience(ClosureModel):
     def __str__(self):
         return self.name
 
+
+class Site(models.Model):
+    name = models.CharField(max_length=50)
+
+    def __str__(self):
+        return self.name
+
+    class Meta:
+        ordering = ['name']
+
+
 class Structure(ClosureModel):
     name = models.CharField(max_length=50)
     parent = models.ForeignKey('self', related_name='children', null=True, blank=True)
@@ -22,10 +33,14 @@ class Structure(ClosureModel):
     def __str__(self):
         return self.name
 
+
 class Document(models.Model):
-    audience = models.ManyToManyField(Audience)
+    audiences = models.ManyToManyField(Audience)
+    sites = models.ManyToManyField(Site)
     standards = models.ManyToManyField(Standard)
-    structure = models.ManyToManyField(Structure)
+    structures = models.ManyToManyField(Structure)
+    title = models.CharField(max_length=255)
+    overview = models.TextField(blank=True, null=True)
 
     def __str__(self):
-        return '{} {}'.format(self.audience, self.structure)
\ No newline at end of file
+        return self.title
\ No newline at end of file