Graphic elements in XML

Guys, I guess I'm kinda stupid or blind or both, but I got this trivial issue:

I try to roundtrip graphics from a simple EDD to XML and back.

So I got this pretty simple rules in EDD, DTD and RWR:

EDD:

element (graphic): image

   attribute list

      1. Name: href          String          Optional

   Initial graphic element format

     1. In all contexts

           Insert anchored frame

DTD:

<!ELEMENT image       EMPTY>

<!ATTLIST image      href       CDATA       #IMPLIED>

RWR:

element "image"

{

          is fm graphic element;

          attribute "href" is fm property file;

}

I got a basic element as top level element defined to get the image placed...

So, what bothers me is, how the hell do I get the damn href attribute told, where the image reference is? The XML output places the image element without problems - but the ref is missing.

Pulling my hairs out on this one...

Cheers Alex