How to use the 'if' attribute in xforms with html elements?

I have a <div> element which I want to use based on the xforms instance value.

Something like:

    <xf:trigger appearance="minimal"  >
                <xf:label >
                  ..
                 <div  if="instance('scope')= 'user'">   <!-- I know this doesn't work -->
                 </div>
                  ..
                </xf:label>
                    ....      
     </xf:trigger>

Is this 'if' attribute where we check instance values only available with the <xf:action>,<xf:submission> etc. elements and not with regular html elements ? Or is there a way I am missing ?

Solution

For conditional HTML elements, XForms allows to define an xf:group element with a ref attribute.

The trick to emulate an "if" is to use a predicate as in ".[instance('scope') = 'user']": this way, the context node remains the same but the xf:group content will be disabled if the condition in the predicate is false.