oxy_unparsed-entity-uri() Function
      
      This function returns the URI value of an unparsed entity name.
      
oxy_unparsed-entity-uri( unparsedEntityName )
            
- unparsedEntityName
- The name of an unparsed entity defined in the DTD.
This function can be useful to display images that are referenced with unparsed entity names.
CSS for displaying the image in Author for an 
                  imagedata
                   with 
                  entityref
                   to an unparsed entity
            
            imagedata[entityref]{
content: oxy_url(oxy_unparsed-entity-uri(attr(entityref))); 
}
            