biblioref
                  biblioref — A cross reference to a bibliographic entry
biblioref ::= EMPTY
| 
                         Name  | 
                     
                         Type  | 
                     
                         Default  | 
                  
| xrefstyle | CDATA | None | 
| endterm | IDREF | None | 
| begin | CDATA | None | 
| end | CDATA | None | 
| linkend | IDREF | Required | 
| units | CDATA | None | 
A cross-reference to a bibliographic entry.
These elements contain biblioref:
                  application, attribution, bibliomisc, bridgehead, citation, citetitle, emphasis, entry, firstterm, foreignphrase, glosssee, glossseealso, glossterm, lineannotation, link, literallayout, lotentry, member, msgaud, olink, para, phrase, primary, primaryie, productname, programlisting, quote, refentrytitle, refpurpose, remark, screen, screeninfo, secondary, secondaryie, see, seealso, seealsoie, seeie, seg, segtitle, simpara, subtitle, synopsis, td, term, termdef, tertiary, tertiaryie, th, title, titleabbrev, tocback, tocentry, tocfront, ulink.