The <cxxclass> element is a reference to a C++ class.
The <cxxclass> element can be used to reference a C++ class from another topic type, such as concept or task.
<task id="connectionsxml"> <title>Connections</title> <taskbody> <steps> <step><cm>Open the connection</cm> <info>You can use <cxxclass keyref="classkey">Connections class</cxxclass> in a C++ application.</info> </step> ... </steps> </taskbody> </task>