diff -r 4d93f4ed95bc -r 63be3ce389f7 src/notes/api/serializers/core.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/notes/api/serializers/core.py	Wed Jun 14 15:17:51 2017 +0200
@@ -0,0 +1,55 @@
+"""
+Serializers for model core classes
+"""
+from rest_framework import serializers
+
+from notes.models import Note, Session
+
+
+class DetailNoteSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Note
+        fields = (
+            'ext_id', 'version', 'created', 'updated',
+            'plain', 'html', 'raw',
+            'categorization', 'margin_note', 'tc_start', 'tc_end'
+        )
+        read_only_fields = ('ext_id', 'version', 'created', 'updated')
+
+
+class ListNoteSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Note
+        fields = (
+            'ext_id', 'tc_start', 'tc_end'
+        )
+        read_only_fields = ('ext_id', )
+
+
+class ListSessionSerializer(serializers.ModelSerializer):
+
+    owner = serializers.SlugRelatedField(
+        read_only=True, slug_field='username', default=serializers.CurrentUserDefault())
+
+    class Meta:
+        model = Session
+        fields = (
+            'ext_id', 'version', 'created', 'updated',
+            'owner', 'title', 'description', 'protocol'
+        )
+        read_only_fields = ('ext_id', 'version', 'created', 'updated', 'owner')
+
+
+class DetailSessionSerializer(serializers.ModelSerializer):
+
+    owner = serializers.SlugRelatedField(read_only=True, slug_field='username')
+    notes = DetailNoteSerializer(many=True, read_only=True)
+
+    class Meta:
+        model = Session
+        fields = (
+            'ext_id', 'version', 'created', 'updated',
+            'owner', 'title', 'description', 'protocol',
+            'notes'
+        )
+        read_only_fields = ('ext_id', 'version', 'created', 'updated', 'owner')