impossible to extract annotation literals with xqdoc

The current xqdoc output format doesn't allow the extraction of multiple annotation literals.

For example,

%restxq:form-param("message","{$message}", "'no message delivered'", 5)

results in

<xqdoc:annotation prefix="restxq" namespace="" localname="form-param" value="message {$message} 'no message delivered' 5"/>.

The proposal is to structure the literals as follows:

<xqdoc:annotation prefix="restxq" namespace="" localname="form-param"/>
  <xqdoc:literal type="string" value="message"/>
  <xqdoc:literal type="string" value="{$message}"/>
  <xqdoc:literal type="string" value="'no message delivered'"/>
  <xqdoc:literal type="numeric" value="5"/>
</xqdoc:annotation>

where the order of the literal elements reflects the order of the literals in the annotation.