% WS on dev list:

\setupreferencestructureprefix
  [default]
  [prefixstopper={\symbol[none]},
   numberstopper={\symbol[none]}]

% \setupreferencestructureprefix
%   [section]
%   [default]
%   [prefixconversion=A]

% \setupreferencestructureprefix
%   [float]
%   [default]
%   [numberconversion=A]

\setuphead
  [chapter]
  [sectionstopper=.]

\setupcaption
  [figure]
  [numberstopper=:]

\starttext

\chapter[sec:dummy]{Dummy chapter}

\placefigure
  [here]
  [fig:dummy]
  {Dummy figure}
  {\externalfigure[dummy]}

Section: \in[sec:dummy]

Float: \in[fig:dummy]

\stoptext
