List topics that refer to a given topic recursively, either by specifying
a TopicReference explicitly in a TWikiForm field, or by being a child topic.
Syntax:
%COUNTCHILDTOPICS{"<topic>" ... }%
"<topic>"
name of a topic
web="..."
web where to search for references; defaults to the web specified as part of the "topic" parameter or the current one
format="..."
format string used to display the count; the variable $count is replaced by the calculated references; defaults to "$count"
single="..."
format string used to display a single hit; defaults to the "format" value (see above)
null="..."
format string used to display a zero hit; defaults to "0"
hidenull="on,off"
if set to "on" nohting is displayed if no references where found; defaults to "off"
Following variables are expanded in format strings: