Can you specify attribute settings in the Quick Element toolbar?

Hi,

I'm using Structured FrameMaker 12 (XML).

I have customized my quick_element.xml toolbar file to create icons that insert custom elements into my documents. This works great. I really need to extend this toolbar so that the icons insert an element with a specified attribute setting. This would save massive amounts of clicks (I know this is possible for keyboard shortcuts via extendscript). The documentation is sparse and the available syntax is not documented for the <ELEMENT> tag in tag-description.xml.

This is the functionality I currently have:

<STRUCTURED_APPLICATION  app_name="Topic">

   <ELEMENT elemTag="Font">

  <images base="fontIcon"/>

   </ELEMENT>

</STRUCTURED_APPLICATION>

This is the functionality that I want:

<STRUCTURED_APPLICATION  app_name="Topic">

   <ELEMENT elemTag="Font" attrName="outputclass" attrVal="emphasis">

  <images base="fontIcon"/>

   </ELEMENT>

</STRUCTURED_APPLICATION>

Does anyone have any idea on how to implement this functionality? Is there missing syntax that I'm unaware of that supports this?

Many thanks,

Matt