+* packagegroup-agl-demo-platform
+
+This is for making image 'agl-demo-platform' which is full image
+for IVI profile of AGL distro.
+
+As meta-agl's design of packagegroups, ``agl-demo-platform.bb`` contains
+only ``packagegroup-agl-demo-platform`` and packages of DEMO apps.
+
+``packagegroup-agl-demo-platform`` has 4 packagegroups in it,
+``packagegroup-agl-core``, ``packagegroup-agl-ivi``,
+``packagegroup-agl-ivi-common-core``, and ``packagegroup-agl-appfw``.
+
+* packagegroup-agl-appfw*
+
+These packagegroups contains packages for application framework of AGL Distro.
+Subsystem should maintain ``packagegroup-agl-appfw-[subsystem].bb`` which
+should hold sufficient packages for application framework of AGL Distro.
+
+Subsystems also can maintain their own packagegroups under appropriate
+``recipes-*/``.
+
+For example, Qt5 has 2 packagegroups in ``meta-agl-demo``,
+``packagegroup-agl-appfw-native-qt5`` and ``packagegroup-agl-demo-qt-examples``
+which are under ``recipes-qt/``.