ConTeXt: Superscript for Citation

Question

Background

I would like to cite bibliography references using superscript.

Example

The setup code so far:

\setupbibtex[database=sources]
\setuppublications[
  refcommand=num,
  numbering=yes
]

\setupcite[num][
  left=\empty,
  right=\empty,
]

A bibliography entry in sources.bib:

@inproceedings{kattamuri@debate,
 author = {Kattamuri, Kishore and Silaghi, Marius and Kaner, Cem and Stansifer, Ryan and Zanker, Markus},
 title = {Supporting Debates over Citizen Initiatives},
 booktitle = {Proceedings of the 2005 National Conference on Digital Government Research},
 series = {dg.o '05},
 year = {2005},
 location = {Atlanta, Georgia},
 pages = {279--280},
 numpages = {2},
 url = {https://repository.lib.fit.edu/bitstream/handle/11141/150/cs-2005-03.pdf},
 acmid = {1065321},
 publisher = {Digital Government Society of North America},
}

Example document:

\starttext
  Citation.\cite[kattamuri@debate]
\stoptext

Problem

There does not appear to be a way to make the citation number superscript. I tried:

\setupcite[num][
  left=\empty,
  right=\empty,
  textstyle=\textsuperscript,
]

I looked in bibl-bib.mkiv and bibl-tra.mkiv but could not see how to hook into the citation macros. I spotted \bibtexnumref and think it might be useful:

\def\bibtexnumref[#1]%
  {\dontleavehmode
   \begingroup
   \bibtexcitationparameter\v!left
   \penalty\plustenthousand
   \ctxlua{bibtex.hacks.resolve("","\number\bibtexblock","#1")}%
   \bibtexcitationparameter\v!right
   \endgroup}

Question

How can ConTeXt produce superscript citation numbers?

Related

Related LaTeX questions:

• Biblatex \textcite using a superscript reference number
• Parentheses around superscript citations in article

Answer 1

From the mailing list (courtesy of Wolfgang Schuster):

% Superscript citation cross-references.
\setupcite[num][
  left=\raisebox{1ex}\hbox\bgroup\tfxx,
  right=\egroup,
]