Entity: xref-atts
Content Model
alt CDATA #IMPLIED 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 specific-use CDATA #IMPLIED xml:lang NMTOKEN #IMPLIED