Retrieve the context names:
context_names -i 10

response:
<response command="context_names" transaction_id="10">
  <context name="Locals" id="0"></context>
  <context name="Globals" id="1"></context>
</response>


Retrieve information from a context:
context_get -i 12 -d 0 -c 0

response:
<response command="context_get" transaction_id="12">
  <property name="a" fullname="\$a" address="140272044"
      type="int"><![CDATA[7]]></property>
</response>