[sXBL] Attachment using definition clarification

Dear SVG/sXBL WG,

a small clarification question regarding Section 3.2 of sXBL, 
"Attachment using definition":

The second paragraph says: "While an element matches the element 
attribute of one of the definition elements that is imported into, or 
defined in, the element's document, the binding defined by the *first* 
such definition element must be bound to the element."

What should the first element be? Something along the lines of 
getElementsByTagName('definition')[0] (grossly simplified)? That is, in 
the sense of "the first definition element that is encountered in a 
preorder traversal of the Document tree"?

Regards,
   Harald Albrecht