Technical
(package, termdef, …)
Error related
(errorcode, errorname, …)
Programming
(function, varname, …)
Products
(productname, trademark, …)
Operating system
(envar, filename, …)
Markup related
(tag, token, literal, …)
Bibliographic
(citation, author, …)
Publishing related
(acronym, footnote, …)
Graphic
(inlinemediaobject)
Keyboard related
(keycap, shortcut, …)
Indexing
(indexterm)
GUI related
(guiicon, guibutton, …)
Links
(link, xref, olink, anchor)