oxy_link-text() Function
      
      content property to obtain a text
         description from the source of a reference.
      By default, the oxy_link-text() function resolves DITA and DocBook references.
            For further details about how you can also extend this functionality to other frameworks,
            go
            to Configuring an Extensions Bundle.
         
DITA Support
For DITA, the oxy_link-text() function resolves the xref
               element and the elements that have a keyref attribute. The text description
               is the same as the one presented in the final output for those elements. If you use
               this
               function for a topicref element that has the navtitle and
               locktitle attributes set, the function returns the value of the
               navtitle attribute.
            
DocBook Support
For DocBook, the oxy_link-text() function resolves the
               xref element that defines a link in the same document. The text
               description is the same as the one presented in the final output for those elements.
            
For the following XML and associated CSS fragments the oxy_link-text()
               function is resolved to the value of the xreflabel attribute.
            
<para><code id="para.id" xreflabel="The reference label">my code</code>
      </para>
<para><xref linkend="para.id"/></para>
            xref {
    content: oxy_link-text();
}
            If the text from the target cannot extracted (for instance, if the href is
               not valid), you can use an optional argument to display fallback text.
            
*[class~="map/topicref"]:before{
    content: oxy_link-text("Cannot find the topic reference");
    link:attr(href);
}
            