<!-- Pose -->
<element name="pose" type="pose" default="0 0 0 0 0 0" required="0">
<description>A position (x,y,z) and orientation (roll, pitch yaw) with respect
to the frame named in the relative_to attribute.</description>
<attribute name="relative_to" type="string" default="" required="*">
<description>
If specified, this pose is expressed in the named frame. The named frame
must be declared within the same scope (world/model) as the element that
has its pose specified by this tag.
If missing, the pose is expressed in the frame of the parent XML element
of the element that contains the pose. For exceptions to this rule and
more details on the default behavior, see
http://sdformat.org/tutorials?tut=pose_frame_semantics.
Note that @relative_to merely affects an element's initial pose and
does not affect the element's dynamic movement thereafter.
New in v1.8: @relative_to may use frames of nested scopes. In this case,
the frame is specified using `::` as delimiter to define the scope of the
frame, e.g. `nested_model_A::nested_model_B::awesome_frame`.
</description>
</attribute>
</element> <!-- End Pose -->