====== Adding a new element to the world model ======
Example, adding a skiros:Location element to skiros:Scene-0:
<code python>
element = Element('skiros:Location')
self._wmi.instanciate(element, relations=[{'src': 'skiros:Scene-0', 'type': 'skiros:contain', 'dst': '-1'}])
</code>

====== Modifying an element in the world model ======
Example, changing the position of an object:
<code python>
element.setData(':Position', [1.0, 0.0, 0.0])
self._wmi.update_element_properties(element)
</code>
Example, changing the frame id of an object:
<code python>
element.setProperty('skiros:FrameId', 'map')
self._wmi.update_element_properties(element)
</code>