Lists the values of the @ref-type attribute, which is used to name the type of element to which an internal reference is pointing; for example, the value “fig” means that the reference is pointing to a <fig>.
<!ENTITY % ref-types "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" >link3.ent