Entity: xref-atts

Content Model

id         ID                               #IMPLIED
              ref-type   (aff | app | author-notes | bibr | 
                         boxed-text | chem | contrib | corresp | 
                         disp-formula | fig | fn | kwd | list | 
                         plate | scheme | sec | statement | 
                         supplementary-material | 
                         table | table-fn | 
                         other)                    #IMPLIED 
              rid        IDREFS                           #IMPLIED