diff --git a/index.bs b/index.bs
index 05b84a6..36a9e74 100644
--- a/index.bs
+++ b/index.bs
@@ -290,7 +290,8 @@ on a sensor hub.
The AbsoluteOrientationSensor Model {#absoluteorientationsensor-model}
----------------------------------------------------------------------
-The Absolute Orientation Sensor [=sensor type=] represents the sensor described in [[MOTION-SENSORS#absolute-orientation]]. Its associated [=extension sensor interface=] is {{AbsoluteOrientationSensor}}, a subclass of {{OrientationSensor}}.
+The Absolute Orientation Sensor [=sensor type=] represents the sensor described in [[MOTION-SENSORS#absolute-orientation]]. Its associated [=extension sensor interface=] is {{AbsoluteOrientationSensor}}, a subclass of {{OrientationSensor}}. Its associated [=virtual sensor type=] is
+"absolute-orientation
".
For the absolute orientation sensor the value of [=latest reading=]["quaternion"] represents
the rotation of a device's [=local coordinate system=] in relation to the Earth's reference
@@ -312,7 +313,8 @@ orientation sensor's [=latest reading=] would represent 0 (rad) [[SI]] rotation
The RelativeOrientationSensor Model {#relativeorientationsensor-model}
----------------------------------------------------------------------
-The Relative Orientation Sensor [=sensor type=] represents the sensor described in [[MOTION-SENSORS#relative-orientation]]. Its associated [=extension sensor interface=] is {{RelativeOrientationSensor}}, a subclass of {{OrientationSensor}}.
+The Relative Orientation Sensor [=sensor type=] represents the sensor described in [[MOTION-SENSORS#relative-orientation]]. Its associated [=extension sensor interface=] is {{RelativeOrientationSensor}}, a subclass of {{OrientationSensor}}. Its associated [=virtual sensor type=] is
+"relative-orientation
".
For the relative orientation sensor the value of [=latest reading=]["quaternion"] represents the
rotation of a device's [=local coordinate system=] in relation to a [=stationary reference coordinate
@@ -496,17 +498,17 @@ This section extends [[GENERIC-SENSOR#automation]] by providing [=Orientation Se
The [=per-type virtual sensor metadata=] [=map=] must have the following [=map/entry=]:
: [=map/key=]
-:: "`absolute-orientation`"
+:: "[=absolute-orientation virtual sensor type|absolute-orientation=]
"
: [=map/value=]
-:: A [=virtual sensor metadata=] whose [=virtual sensor metadata/virtual sensor type=] is [=Absolute Orientation Sensor=] and [=reading parsing algorithm=] is [=parse quaternion reading=].
+:: A [=virtual sensor metadata=] whose [=virtual sensor metadata/reading parsing algorithm=] is [=parse quaternion reading=].
Relative Orientation Sensor automation
The [=per-type virtual sensor metadata=] [=map=] must have the following [=map/entry=]:
: [=map/key=]
-:: "`relative-orientation`"
+:: "[=relative-orientation virtual sensor type|relative-orientation=]
"
: [=map/value=]
-:: A [=virtual sensor metadata=] whose [=virtual sensor metadata/virtual sensor type=] is [=Relative Orientation Sensor=] and [=reading parsing algorithm=] is [=parse quaternion reading=].
+:: A [=virtual sensor metadata=] whose [=virtual sensor metadata/reading parsing algorithm=] is [=parse quaternion reading=].
Acknowledgements {#acknowledgements}
================