Associating a command with a <choice> tag

Is this possible, if so how?

Example of what I was thinking:

<map id="license.choices">
  <entry key="false" value="I do NOT accept the license agreement" />
  <entry key="true" value="I accept the license agreement" />
</map>
...
<choice id="license.choice" map="license.choices" type="radio"
command="enable.license.next" />
...
<button label="Prev &lt;" id="license.prev" command="welcome.show"
accesskey="P" key="p" />
<button label="Next &gt;" id="license.next" command="chooselocation.show"
accesskey="N" key="n" />



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