- case @type
- when :ref
  anchor id=@target xreflabel=@text /
- when :xref
  - if @text.nil?
    xref linkend=@target /
  - else
    link linkend=@target =@text
- when :link
  ulink url=@target =@text
- when :bibref
  anchor id=@target xreflabel="[#@target]"
  | [#@target]